Loading...
The URL can be used to link to this page
Your browser does not support the video tag.
Home
My WebLink
About
APPROVED Powerwall+ with Backup Switch Installation Manual
Powerwall+ Installation Manual with Backup Switch For the latest Powerwall+ installation documents in all supported languages, visit: www.tesla.com/support/powerwall To secure the full 10-year product warranty, Powerwall+ must be registered by completing the commissioning process and sending system information to Tesla. Product Speciffcations All speciffcations and descriptions contained in this document are veriffed to be accurate at the time of printing. However, because continuous improvement is a goal at Tesla, we reserve the right to make product modiffcations at any time. The images provided in this document are for demonstration purposes only. Depending on product version and market region, details may appear slightly difierent. Errors or Omissions To communicate any inaccuracies or omissions in this manual, send an email to: energy-pubs@tesla.com. ©2021 TESLA, INC. All rights reserved. All information in this document is subject to copyright and other intellectual property rights of Tesla, Inc. and its licensors. This material may not be modiffed, reproduced or copied, in whole or in part, without the prior written permission of Tesla, Inc. and its licensors. Additional information is available upon request. The following are trademarks or registered trademarks of Tesla, Inc. in the United States and other countries: Tesla Tesla Motors Powerwall All other trademarks contained in this document are the property of their respective owners and their use herein does not imply sponsorship or endorsement of their products or services. The unauthorized use of any trademark displayed in this document or on the product is strictly prohibited. Electronic Device: Do Not Throw Away Proper disposal of batteries is required. Refer to local codes for disposal requirements. For Private Households: Information on Disposal for Users of WEEE This symbol on the product(s) and / or accompanying documents means that used electrical and electronic equipment (WEEE) should not be mixed with general household waste. For proper treatment, recovery and recycling, please take this product(s) to designated collection points where it will be accepted free of charge. Alternatively, in some countries, you may be able to return your products to your local retailer upon purchase of an equivalent new product. Disposing of this product correctly will help save valuable resources and prevent any potential negative efiects on human health and the environment, which could otherwise arise from inappropriate waste handling. Please contact your local authority for further details of your nearest designated collection point. Penalties may be applicable for incorrect disposal of this waste, in accordance with you national legislation. For Professional Users in the European Union If you wish to discard electrical and electronic equipment (EEE), please contact your dealer or supplier for further information. For Disposal in Countries Outside of the European Union This symbol is only valid in the European Union (EU). If you wish to discard this product please contact your local authorities or dealer and ask for the correct method of disposal. General Warnings and Information.................3 Speciffcations..........................................................6 Powerwall+ Speciffcations..................................................6 Backup Switch Speciffcations...........................................8 Registering Powerwall+.......................................9 Powerwall+ Overview.........................................10 Site Requirements and Pre-Installation Guidance...................................................................11 Powerwall+ with Backup Switch Installation Requirements..........................................................................11 Powerwall+ Physical Requirements...............................12 Powerwall+ Optimum Temperature Range.................12 Backup Switch Physical Requirements........................14 Preparing for Installation...................................15 In the Powerwall+ Crate.....................................................15 In the Backup Switch Box..................................................16 Required Tools.......................................................................17 Required Supplies.................................................................18 Service Parts, Orderable Parts, and Accessory Kits.... .....................................................................................................19 Powerwall+ Service Parts, Orderable Parts, and Accessories............................................................................19 Backup Switch Service Parts, Orderable Parts, and Accessory Kits......................................................................19 STEP 1: Plan the Installation Site...................20 Choose a Location..............................................................20 Choose Solar Assembly Cable Entry...........................20 Plan Wiring Method............................................................20 Plan Distance Between Components..........................20 STEP 2: Mount Powerwall+...............................21 Anchor the Powerwall+ Mounting Brackets...............21 Mount the Battery Assembly on the Bracket...........26 Mount the Solar Assembly...............................................29 STEP 3: Connect the Solar and Battery Assemblies..............................................................31 STEP 4: Make Solar DC Connections...........32 Make DC Power Connections..........................................32 Install MPPT Paralleling Jumpers (Optional)............34 Install Mid-Circuit Interrupters in PV Array................36 STEP 5: Install Backup Switch........................40 Inspect the Meter and Meter Socket...........................40 Remove the Meter................................................................41 Install the Backup Switch.................................................43 Reinstall the Meter..............................................................45 Connect Powerwall+ to the Backup Switch..............47 STEP 6: Make AC Power Connections........50 UL 1741 PCS Requirements...............................................52 STEP 7: Install Optional System Shutdown Switch......................................................................54 STEP 8: Complete the Installation.................57 Plan Internet Connection for Powerwall+...................57 Close the Wiring Compartments and Turn the System On..............................................................................57 Conffgure the System........................................................60 Backup Switch Ofi-Grid Test..........................................61 Finish and Demonstrate the Installation......................61 Technical Support................................................................62 Maintenance...........................................................................62 Appendix A: Powerwall+ Mounting Details.... ....................................................................................63 Powerwall+ Space Requirements..................................63 Mounting Bracket Anchoring Details...........................65 Appendix B: Wiring Reference......................70 Powerwall+ Wiring..............................................................70 Solar Assembly and Battery Assembly Connections ..................................................................................................70 Battery Assembly Wiring.................................................71 Solar Assembly Wiring.....................................................72 Backup Switch Wiring.......................................................74 Appendix C: System Wiring Diagrams........75 Whole Home Backup..........................................................75 Appendix D: Inverter Settings........................76 Voltage Ride-Through........................................................76 Frequency Ride-Through..................................................77 Accuracy.................................................................................78 Other Function Parameters.............................................78 Appendix E: Solar Assembly Rapid Shutdown................................................................81 Rapid Shutdown Initiation................................................82 Self-Test Function................................................................82 Rapid Shutdown Initiator Label......................................82 RSD Initiator Label Location..........................................82 Appendix F: System Energy Metering.........83 Installing a Neurio Remote Energy Meter..................83 Wireless Communication to the Powerwall+...........83 Meter Voltage Taps............................................................83 Voltage Tap and Current Transformer Connections.. ..................................................................................................84 Meter Placement and CT Wire Lengths....................84 Current Transformer Placement...................................85 Current Transformer Orientation.................................86 Current Transformer Capacity......................................86 Installing the Meter............................................................87 Appendix G: Installation Troubleshooting...... ...................................................................................90 Updating Firmware.............................................................90 Accessing the Powerwall+ User Interface..................90 Conffguring Energy Meters.............................................90 Reset the Backup Switch...................................................91 Power Cycle the System....................................................91 Appendix H: Safety Features..........................92 Arc Fault Detection and Protection..............................92 Ground Fault Protection...................................................92 Protective Earth Impedance Check..............................92 System LED Behavior.........................................................93 Powerwall+ LED Behavior...............................................93 Backup Switch LED Behavior........................................93 Neurio Meter LED Behavior...........................................94 Appendix I: Multi-Powerwall+ Installations..... ....................................................................................95 Multi-Powerwall+ Systems...............................................95 Powerwall+ Systems with Powerwall 2 AC................96 Side by Side Installations................................................96 Stacked Installations........................................................101 In the Powerwall Stack Kit............................................101 Required Tools..................................................................101 Site Requirements..........................................................102 Installation Instructions................................................103 Step 1: Prepare for Installation..................................103 Step 2: Choose a Wiring Option..............................105 Step 3: Prepare for Concealed Wiring...................105 Step 4: Join the Units..................................................107 Step 5: Wire the Powerwall Units.............................114 Step 6: Close the Wiring Compartments and Replace the Covers........................................................116 Step 7: Turn On and Conffgure the System..........118 Appendix J: Servicing Powerwall+...............119 Performing a Backup Switch Manual Override........119 Backup Switch Manual Override Switch Positions...... ....................................................................................................119 Servicing the Solar Assembly.......................................120 Appendix K: Revision Log..............................122 GENERAL WARNINGS AND INFORMATION ATTENTION: Read this entire document before installing or using Powerwall+. Failure to do so or to follow any of the instructions or warnings in this document can result in electrical shock, serious injury, or death, or can damage Powerwall+, potentially rendering it inoperable. Important Safety Instructions This manual contains important instructions for the Tesla Powerwall+ and Backup Switch that must be followed during installation and maintenance of the system. Symbols Used CAUTION: indicates a hazardous situation which, if not avoided, could result in minor injury or damage to the equipment. RISK OF ELECTRIC SHOCK: indicates components that present risk of electrical shock. WARNING: indicates a hazardous situation which, if not avoided, could result in injury or death. CAUTION, RISK OF ELECTRIC SHOCK, ENERGY STORAGE TIMED DISCHARGE. Discharge time is 5 minutes from de-energization. NOTE: indicates an important step or tip that leads to best results, but is not safety or damage related. BIDIRECTIONAL TERMINAL: Indicates location of combined input/output connector on the equipment. REFER TO OPERATING INSTRUCTIONS: indicates that user should refer to operating or installation instructions before proceeding. PROTECTIVE CONDUCTOR TERMINAL: Indicates location of grounding connection on the equipment. General Information WARNING: Powerwall+ installation must be carried out only by a competent electrician who is certiffed by Tesla and who has been trained in dealing with low voltage electricity. WARNING: Electric shock hazard. The DC conductors of this PV system are normally ungrounded but will become intermittently grounded without indication when the inverter measures the PV array isolation. Energy stored in capacitor. Do not remove cover until 5 minutes after disconnecting the equipment. Power fed from more than one source. Disconnect all sources of supply before servicing. WARNING: Do not touch non-insulated cable ends. WARNING: Do not touch the DC conductors when energized. 3Powerwall+ Installation Manual WARNING: Do not touch any live components of the inverter. WARNING: If an error occurs, have it rectiffed by qualiffed persons only. WARNING: Before beginning the wiring portion of the installation, ensure that Powerwall+ is switched ofi, and lock out any associated circuit breakers and disconnect switches (if applicable for the installation). WARNING: Prior to performing any work on Powerwall+, disconnect it from all voltage sources as described in this document. WARNING: Connect and ground the PV modules, array frame, and non-current carrying electrically conductive components so that there is continuous conduction. Observe the applicable local regulations. WARNING: This Photovoltaic Rapid Shutdown Equipment (PVRSS) does not perform all of the functions of a complete Photovoltaic Rapid Shutdown Equipment (PVRSS). This PVRSS must be installed with other equipment to form a complete PVRSS that meets the requirements of NEC (NFPA 70) section 690.12 for controlled conductors outside the array. Other equipment installed in or on this PV system may adversely afiect the operation of the PVRSS. It is the responsibility of the installer to ensure that the completed PV system meets the Rapid Shutdown functional requirements. This equipment must be installed according to the manufacturer’s installation instructions. WARNING: Risk of electric shock and ffre. Use only with PV modules with a maximum system voltage of rating of 600 V or higher. WARNING: A battery can present a risk of electrical shock, ffre, or explosion from vented gases. Observe proper precautions. WARNING: Powerwall+ is heavy. Use of lift equipment is recommended. WARNING: Use Powerwall+ only as directed. WARNING: Do not use Powerwall+ if it is defective, appears cracked, broken, or otherwise damaged, or fails to operate. WARNING: Do not attempt to open, disassemble, repair, tamper with, or modify Powerwall+. Powerwall+ and its components are not user serviceable. Batteries in Powerwall+ are not replaceable. Contact Tesla Support for guidance on repairs. WARNING: To protect Powerwall+ and its components from damage when transporting, handle with care. Do not impact, pull, drag, or step on Powerwall+. Do not subject Powerwall+ to any strong force. To help prevent damage, leave Powerwall+ in its shipping packaging until it is ready to be installed. WARNING: Do not insert foreign objects into any part of Powerwall+. WARNING: Do not expose Powerwall+ or its components to direct flame. WARNING: Do not install Powerwall+ near heating equipment. GENERAL WARNINGS AND INFORMATION 4Powerwall+ Installation Manual WARNING: Do not immerse Powerwall+ or its components in water or other fluids. WARNING: Install Powerwall+ in a location that prevents damage from flooding. WARNING: Operating or storing Powerwall+ in temperatures outside its speciffed range might cause damage to Powerwall+. WARNING: Do not expose Powerwall+ to ambient temperatures above 60°C (140°F) or below -30°C (-22°F). CAUTION: Risk of electric shock. Do not remove cover, there are no user serviceable parts inside. Refer servicing to qualiffed personnel. CAUTION: Both AC and DC voltage sources are terminated inside this equipment. Each circuit must be individually disconnected before servicing. CAUTION: When the PV array is exposed to light, it supplies a DC voltage to this equipment. CAUTION: Do not use solvents to clean Powerwall+, or expose Powerwall+ to flammable or harsh chemicals or vapors. CAUTION: Do not use fluids, parts, or accessories other than those speciffed in this manual, including use of non-genuine Tesla parts or accessories, or parts or accessories not purchased directly from Tesla or a Tesla-certiffed party. CAUTION: Do not place Powerwall+ in a storage condition for more than one (1) month, or permit the electrical feed on the Powerwall+ to be severed for more than one (1) month, without placing Powerwall+ into a storage condition in accordance with Tesla’s storage speciffcations. CAUTION: Do not paint any part of Powerwall+, including any internal or external components such as the exterior shell or casing. CAUTION: When installing Powerwall+ in a garage or near vehicles, keep it out of the driving path. If possible, install Powerwall+ on a side wall and/or above the height of vehicle bumpers. CAUTION: Avoid installing Powerwall+ in direct sunlight. CAUTION: Ensure that no water sources are above or near Powerwall+, including downspouts, sprinklers, or faucets. CAUTION: Ensure that snow does not accumulate around Powerwall+. GENERAL WARNINGS AND INFORMATION 5Powerwall+ Installation Manual SPECIFICATIONS Powerwall+ Speciffcations Photovoltaic (PV) and Battery Energy Storage System (BESS) Speciffcations Nominal Battery Energy 13.5 kWh Nominal Grid Voltage (Input / Output)208 VAC 120/240 VAC Grid Voltage Range 183 - 228.8 VAC 211.2 - 264 VAC Maximum Continuous Power On-Grid 5 kW input / 6.6 kW output 5 kW input / 7.6 kW output BESS Continuous Power 5 kW input / 5 kW output 5 kW input / 5 kW output Maximum Continuous Power Oif-Grid -5 kW input / 9.6 kW output Frequency 60 Hz Phase 240 VAC: 2W + N + GND Maximum Continuous Current On-Grid 32 A output BESS Continuous Current 24 A input Maximum Continuous Current Oif-Grid 40 A output PV Maximum Input Voltage 600 VDC PV Operating DC Input Voltage Range 60 - 550 VDC PV DC MPPT Voltage Range 60 - 480 VDC Maximum Power Point Trackers (MPPTs)4 Input Connectors per MPPT 1-2-1-2 Maximum Current per MPPT (Imp)13 A Maximum Short Circuit Current per MPPT (Isc) 15 A Overcurrent Protection Device 50 A Output Power Factor Rating +/– 0.9 to 1 Round Trip Efficiency 90%1 Customer Interface Tesla Mobile App Internet Connectivity Wi-Fi, Ethernet, Cellular (LTE/4G)2 PV AC Metering Revenue grade (+/-0.5%) Protections Integrated arc fault circuit interrupter (AFCI), Rapid Shutdown 1AC to battery to AC, at beginning of life. 2Cellular connectivity subject to network service coverage and signal strength. 6Powerwall+ Installation Manual Mechanical Speciffcations Dimensions 1596 mm x 755 mm x 160 mm (62.8 in x 29.7 in x 6.3 in) Total Weight 156 kg (343.9 lbs)3 Battery Assembly Weight 125 kg (275.6 lbs) Solar Assembly Weight 31 kg (68.3 lbs) Mounting Floor or wall mount 3The total weight does not include the Powerwall+ bracket, which weighs an additional 10.5 kg (23 lb). Environmental Speciffcations Operating Temperature –20°C to 50°C (–4°F to 122°F)4 Recommended Temperature 0°C to 30°C (32°F to 86°F)4 Operating Humidity (RH)Up to 100%, condensing Storage Conditions –20°C to 30°C (–4°F to 86°F) Up to 95% RH, non-condensing State of Energy (SoE): 25% initial Maximum Elevation 3000 m (9843 ft) Enclosure Type Type 3R Noise Level @ 1 m < 40 db(A) optimal, < 50 db(A) maximum 4Performance may be de-rated at operating temperatures below 10°C (50°F) or greater than 43°C (109°F). SPECIFICATIONS 7Powerwall+ Installation Manual Backup Switch Speciffcations Performance Speciffcations Continuous Load Rating 200A, 120/240V Split phase Short Circuit Current Rating 10 kA with any breaker, 22 kA with minimum 22 kA breaker1 Communication CAN 1This Backup Switch is rated for use on a circuit delivering not more than 10,000 RMS symmetrical amperes, 300 V maximum. When used in conjunction with a circuit breaker rated not more than 200 A, the Backup Switch is rated for use on a circuit capable of delivering not more than 22,000 RMS symmetrical amperes, 300V maximum, not in excess of circuit breaker interrupting rating. Watthour meter not included in short circuit current rating. Compliance Information Safety Standards USA: UL 414, CA Prop 65 Emissions FCC, ICES Mechanical Speciffcations Dimensions 176 mm x 205 mm x 74 mm (6.9 in x 8.1 in x 2.9 in) Weight 1.27 kg (2.8 lbs) Meter and Socket Compatibility ANSI Type 2S, ringless or ring type External Service Interface Contactor manual override2, Reset button Conduit Compatibility 1/2" NPT 2Manually overrides the contactor position during a service event. Environmental Speciffcations Operating Temperature –40°C to 50°C (–40°F to 122°F) Storage Temperature –40°C to 85°C (–40°F to 185°F) Enclosure Rating NEMA 3R SPECIFICATIONS 8Powerwall+ Installation Manual REGISTERING POWERWALL+ Tesla Powerwall+ comes with a warranty whose term depends on the connection of Powerwall+ to the Internet. To secure the full 10-year warranty for Powerwall+, it must be reliably connected to the Internet to allow remote ffrmware upgrades from Tesla. If an Internet connection is not established or is interrupted for an extended period, and Tesla is unable to contact the owner, the warranty may be limited to 4 years. To ensure that the owner can receive the full 10-year warranty, be sure to complete the commissioning process so that registration information is sent to Tesla. For more information, refer to the Powerwall+ Warranty for your region at www.tesla.com. 9Powerwall+ Installation Manual POWERWALL+ OVERVIEW Figure 1. Full Powerwall+ Assembly 1. Solar assembly 2. Battery assembly 3. Solar assembly bracket 4. Battery assembly bracket 10Powerwall+ Installation Manual SITE REQUIREMENTS AND PRE-INSTALLATION GUIDANCE Powerwall+ with Backup Switch Installation Requirements Powerwall+ comes with a Backup Switch to enable integration with the electrical grid and generation like solar systems. Powerwall+ and the Backup Switch communicate by means of wired connection. Wiring and conduit (where required) must be provided by the installer and installed to comply with local codes. AC isolation and interconnection requirements between Powerwall+ and the electrical panel are subject to local codes. Ensure that the installation meets local isolation and interconnection requirements. All U.S. and Canada electrical installations must be done in accordance with local codes and the National Electric Code (NEC) ANSI/NFPA 70 or the Canadian Electrical Code CSA C22.1. • The connection requirements of the grid operator must be met. • The conductors with regards to ampacity, rated temperatures, operating conditions and power loss must be made in accordance with the local standards and the National Electrical Code® ANSI/NFPA 70 or the Canadian Electrical Code® CSA C22.1. • The conductor type must be copper wire. • The AC and DC electric circuits are isolated from the enclosure. If required by section 250 of the National Electrical Code®, ANSI/NFPA 70, the installer is responsible for grounding the system. • The grid voltage must be within the permissible range. WARNING: When Powerwall+ is installed in a dwelling unit, ffre detection and protection equipment should be installed in accordance with local building and ffre codes. CAUTION: Before installing, disconnecting, and/or adjusting current transformers for metering, ensure the circuits being measured are not energized and the system is completely powered down. Failure to de-energize the system may compromise operator and equipment safety. NOTE: All installations must conform to the laws, regulations, codes, and standards applicable in the jurisdiction of installation. 11Powerwall+ Installation Manual Figure 2. Powerwall+ and Backup Switch Dimensions Powerwall+ Physical Requirements Powerwall+ can be mounted on a floor or wall, and includes a mounting bracket to support either conffguration. Mounting Powerwall+ must follow the guidance outlined in this document. Mounting requirements based on wall type are provided in Appendix A: Powerwall+ Mounting Details on page 63. Powerwall+ requires adequate clearance for installation, cabling, and airflow. Do not install anything above Powerwall+ that limits access to the unit or that might fall and damage the unit. Do not mount Powerwall+ horizontally or upside down. NOTE: Powerwall+ has a pump and fan that produce a gentle hum during operation, comparable to a typical refrigerator. The noise level depends on the ambient temperature and the power level of operation. Consider these noise levels when choosing where to install Powerwall+. Powerwall+ Optimum Temperature Range Powerwall+ is rated to operate in temperatures from –4°F to 122°F (-20°C to 50°C). However, for best performance Tesla recommends installing Powerwall+ in locations with ambient temperature between 32°F to 86°F (0°C to 30°C) year round. When outside this optimum temperature range, charge/discharge power may be reduced and Powerwall+ will utilize its thermal control system more frequently to maintain battery cell temperature which will reduce the energy efficiency of the system. Systems operating ofi-grid for long periods (>4 hours) in cold weather may need to curtail PV, and reduce energy used for pre-conditioning. SITE REQUIREMENTS AND PRE-INSTALLATION GUIDANCE 12Powerwall+ Installation Manual • For cold climates Tesla strongly recommends installing Powerwall+ indoors when possible (particularly when long outages are expected). • For hot climates Tesla recommends keeping Powerwall+ out of direct sunlight. Installation in full sun raises the temperature inside the enclosure above ambient temperature. This temperature rise is not a safety risk, but may impact battery performance. Additionally, if stored in a cold environment (e.g. below 32°F (0°C)) before installation, it may take several hours for Powerwall+ to raise its internal temperature using pre-conditioning. Tesla recommends storing Powerwall+ in a warm location prior to installation to help efficiently commission and test the system. SITE REQUIREMENTS AND PRE-INSTALLATION GUIDANCE 13Powerwall+ Installation Manual Backup Switch Physical Requirements Meter and Meter Socket Type Backup Switch can be installed on a 4-jaw Form 2S ring or ringless meter, up to 200 A continuous. Figure 3. Form 2S Meter Backup Switch Clearance Before installing Backup Switch, ensure there is sufficient room to do so. Backup Switch will add 2.9 inches (74 mm) to the total space required in front of the meter socket panel. SITE REQUIREMENTS AND PRE-INSTALLATION GUIDANCE 14Powerwall+ Installation Manual PREPARING FOR INSTALLATION In the Powerwall+ Crate 1. Battery assembly 2. Solar assembly 3. Solar assembly bracket 4. Battery assembly bracket Powerwall+ Accessory Bag • (1) square nut for fastening the solar assembly bracket to the battery assembly bracket • (1) T30 drive stainless steel fastener for fastening the solar assembly enclosure to the bracket • (1) M5 (8 mm) nut for fastening the door ground wire to the door stud • (1) 1/2-inch cable gland • (1) Parallel wire jumper (red wire) • (1) Parallel wire jumper (black wire) • Printed owner's manual 15Powerwall+ Installation Manual In the Backup Switch Box 1. Backup Switch 2. (1) Conduit Hub with (3) captive fasteners 3. (1) 4-pin terminal block connector 4. (1) Sealing ring Not pictured: (1) Conduit hole cover PREPARING FOR INSTALLATION 16Powerwall+ Installation Manual Required Tools General Tools • Personal protective equipment (safety glasses, gloves, protective footwear) • Installation tools (level, stud sensor, tape measure, pencil, painter’s tape, flashlight) • Digital camera or smartphone for documenting the installation • Drill and drill bit for drilling pilot holes in mounting surface (5/32-inch bit for wood studs) • Torque screwdriver with 1/4-inch bit holder, T20 Torx bit, and T30 Torx bit • Small (2 mm) flathead screwdriver (for wiring connector spring terminals) • Hole saw or knockout kit Powerwall+ Installation Tools • Minimum ¼-inch mounting screws • Wire strippers/cutters for 24 AWG to 6 AWG (0.2 mm2 to 16 mm2) wires • Socket wrench and 8 mm socket for securing grounding strap to solar assembly enclosure door • L-shaped 90-degree PH2 screwdriver under 1 inch in height for securing the solar assembly enclosure door shut • Multimeter and Loop Impedance Tester • Lift equipment capable of lifting and supporting 131 kg up to 1.5 m • Ratcheting strap to secure battery assembly to lift equipment WARNING: Powerwall+ is heavy. Wear appropriate personal protective equipment (such as gloves and protective footwear) when handling the unit. Only a sufficient number of trained movers should lift Powerwall+. Use of lift equipment is recommended. Backup Switch Installation Tools • Phillips PH2 screwdriver • Arc flash personal protective equipment, minimum Category 2 as deffned in NFPA 70E • 6.2-inch diameter Meter puller PREPARING FOR INSTALLATION 17Powerwall+ Installation Manual Required Supplies • Mounting bracket hardware (see Appendix A: Powerwall+ Mounting Details on page 63) • Wiring methods (depending on local electrical requirements) ◦ For installations where communication wiring must be protected, 1/2-inch LFNC Liquid Tight Flexible Non-metallic Conduit (LFNC) with NPT threaded ffttings ◦ For installation where communication wiring protection is not required, 1/2-inch NPT threaded cable glands • Minimum 600 V rated 4-conductor (twisted pair optional) or double-insulated (with one twisted pair) shielded copper (Cu) cable • Minimum 10 AWG, 600 V rated, UV resistant, 90°C rated, copper (Cu) wire ◦ DC and AC wiring conductors must be made of solid wire, stranded wire or ffne stranded wire. When using ffne stranded wire, bootlace ferrules must be used. ◦ Conductor cross-section intake range: 10 AWG to 6 AWG (6 mm² to 16 mm²) Optional Supplies • Luggage lock (such as a Master Lock 120 series) for securing the solar assembly door shut PREPARING FOR INSTALLATION 18Powerwall+ Installation Manual Service Parts, Orderable Parts, and Accessory Kits Powerwall+ Service Parts, Orderable Parts, and Accessories Tesla Part Number Name Description 1850000-xx-y Powerwall+Powerwall+ battery and solar assemblies, brackets, and accessory bag 1538000-25-y Powerwall+ Solar Assembly 7.6 kW solar assembly for Powerwall+ 3012170-25-y Powerwall+ Battery Assembly Battery assembly for Powerwall+ 1600182-xx-y Solar assembly ground wire Solar assembly ground wire and M5 (8 mm) nut 1104458-xx-y Solar assembly ground nut Solar assembly M5 (8 mm) ground nut 1550379-xx-y Tesla MCI Tesla Mid Circuit Interrupter (MCI) 1112484-04-y Neurio W2 remote meter kit Neurio W2 remote meter with (2) 200 A Neurio W2 current transformers (CTs) 1622277-xx-y (2) Neurio W2 CTs (2) 200 A Neurio W2 current transformers (CTs) 1622289-xx-y Neurio W2 CT Extension Neurio W2 CT extension wires (11 m / 36 ft) 1622286-xx-y Neurio W2 CT Y-Splitter Neurio W2 CT Y-Splitter to allow for paralleling CT connections 1112154-00-x Powerwall Stack Kit Powerwall Stack Kit for stacked installations Backup Switch Service Parts, Orderable Parts, and Accessory Kits Part Number Name Description 1624171-00-x Backup Switch Replacement Backup Switch 1625052-00-x Backup Switch conduit hub kit Additional conduit hub with captive fasteners and label, (4) Wago connectors, and (1) Phoenix connector 1626867-00-x Backup Switch sealing ring Additional sealing ring PREPARING FOR INSTALLATION 19Powerwall+ Installation Manual STEP 1: PLAN THE INSTALLATION SITE Choose a Location Choose a wall capable of supporting the full weight of Powerwall+, with one of the following characteristics: • Wood studs at regular intervals • Plywood sheeting of sufficient thickness • Solid concrete or masonry • Metal studs of sufficient gauge If floor-mounting Powerwall+, choose a level surface adjacent to a wall space that meets the above requirements. Make sure the area is isolated from hazards that could damage Powerwall+, such as vehicle traffic or flooding. Consider the spacing requirements for Powerwall+ (see Appendix A: Powerwall+ Mounting Details on page 63). Choose Solar Assembly Cable Entry Determine which knockouts will be used to route cables (AC and DC) into the solar assembly from the left side of the enclosure using either conduit or cable glands. NOTE: Wiring shall only be installed in the knockout positions on the left side of the enclosure. Plan Wiring Method Calculate the amount and size of appropriate cable needed for the installation, based on ffll limits and local code requirements. An adapter may be required between the entry into the Powerwall+ wiring compartment and the conduit. Plan Distance Between Components Follow the table below for maximum distances between system components. Wire gauge must meet local codes and in some circumstances wire gauge requirements change based on distance. Refer to Appendix B on page 70 for wire gauge requirements. Distance to Measure Maximum Cable Length Backup Switch to Powerwall+*150 ft (45 m) for 16 AWG (1.5 mm2) wire 82 ft (25 m) for 18 AWG (0.8 mm2) wire Powerwall+ to Internet router (wired Ethernet connection)328 ft (100 m) *Total length of communications cable, including daisy-chained connections, through last Powerwall in chain CAUTION: Failure to follow minimum cable size and length requirements may result in intermittent or unreliable operation of the Powerwall+ system. In systems that do not meet these minimum requirements, performance issues may arise even after successful commissioning. 20Powerwall+ Installation Manual STEP 2: MOUNT POWERWALL+ Anchor the Powerwall+ Mounting Brackets NOTE: For additional information on mounting Powerwall+, including minimum spacing requirements, refer to Appendix A: Powerwall+ Mounting Details on page 63. 1. Using the bracket measurements below for reference, plan the position of the brackets before mounting. Note that alignment of the battery assembly and solar assembly to the brackets is critical in installing Powerwall+; if each assembly is not properly aligned with its bracket, the installation cannot be completed. 21Powerwall+ Installation Manual NOTE: When measuring from the top of the battery assembly bracket, measure from the metal edge of the bracket, not the rubber bumpers. STEP 2: MOUNT POWERWALL+ 22Powerwall+ Installation Manual 2. Using a drill and level, mount the battery assembly bracket to the selected wall. See Mounting Bracket Anchoring Details on page 65 for additional details on the type and number of fasteners to use. Figure 4. Mount Battery Assembly Bracket STEP 2: MOUNT POWERWALL+ 23Powerwall+ Installation Manual 3. Align the solar assembly bracket to the battery assembly bracket using the alignment pin. Using a drill and level, mount the solar assembly bracket to the battery assembly bracket and wall. See Mounting Bracket Anchoring Details on page 65 for additional details on the type and number of fasteners to use. STEP 2: MOUNT POWERWALL+ 24Powerwall+ Installation Manual 4. Install the provided square nut over the alignment pin and tighten it by hand. STEP 2: MOUNT POWERWALL+ 25Powerwall+ Installation Manual Mount the Battery Assembly on the Bracket 1. Switch ofi the battery assembly. WARNING: Switching ofi will ensure Powerwall+ does not grid form. However, AC voltage may still be present from the grid. Ensure all equipment is safely de-energized before working. 2. Using lift equipment, position the battery assembly close to the wall and adjust the height of the battery assembly until its mounting cleats are just above the flanges on the bracket. 3. Lower the battery assembly until the top cleat engages the top flange on the bracket and the bottom cleat aligns with the bottom flange. Figure 5. Alignment of Battery Assembly Cleats on Bracket STEP 2: MOUNT POWERWALL+ 26Powerwall+ Installation Manual 4. With both cleats engaged, lower the battery assembly onto the bracket. An audible click will be heard when the cleats are seated in the bracket and the locking mechanism at the center of the top flange clicks into place. NOTE: To remove the battery assembly from the mounting bracket, place a thin piece of sheet metal between the battery assembly and the bracket to compress the locking mechanism, and lift the battery assembly straight up. Figure 6. Mounting the Battery Assembly on the Bracket 5. Conffrm the battery assembly is centered on the bracket: STEP 2: MOUNT POWERWALL+ 27Powerwall+ Installation Manual a. Measure from the edge of the battery assembly to the edge of the bracket and ensure the distance is 47 mm (1-3/16 inches). Refer to Anchor the Powerwall+ Mounting Brackets on page 21 for mounting bracket dimensions. b. If the battery assembly is not centered, adjust it until it is centered on the bracket. 6. If wall-mounting the battery assembly, remove the feet from the unit. STEP 2: MOUNT POWERWALL+ 28Powerwall+ Installation Manual Mount the Solar Assembly 1. Using a hole saw or knockout kit, drill out the cable access holes from the solar assembly. The communication wiring knockout is ½" in diameter, and all other cable knockouts are ¾” in diameter. All knockouts can can be expanded. Figure 7. Recommended Wiring Order 2. Position the solar assembly close to the wall and adjust the height of the unit until its mounting cleats are just above the flanges on the bracket. STEP 2: MOUNT POWERWALL+ 29Powerwall+ Installation Manual 3. Lower the solar assembly until the top cleats engage with the top flange on the bracket and the bottom cleats engage with the bottom flange. NOTE: The solar assembly must be installed in the orientation shown below. Do not install the enclosure upside down or on its side. 4. Secure the solar assembly to the bracket by installing the provided T30 fastener (M6-1.0 x 10 mm stainless steel screw) in the threaded hole as shown below. STEP 2: MOUNT POWERWALL+ 30Powerwall+ Installation Manual STEP 3: CONNECT THE SOLAR AND BATTERY ASSEMBLIES 1. Route the battery assembly wiring harness into the solar assembly wiring compartment. Use the bottom knockout in the solar assembly and secure the cable gland. NOTE: See Mount the Solar Assembly on page 29 for a labeled diagram of the solar assembly knockouts. 2. Plug the battery assembly AC wiring harness into the battery assembly AC wiring terminal. Ensure the wiring harness connector clicks into place. 3. Plug the battery assembly CAN wiring harness into the battery assembly CAN wiring terminal. Ensure the wiring harness connector clicks into place. 31Powerwall+ Installation Manual STEP 4: MAKE SOLAR DC CONNECTIONS WARNING: Always terminate DC wires at Powerwall+ before connecting them to the solar panels. WARNING: When the PV array is exposed to sunlight, a dangerous DC voltage is generated in the DC conductors. Touching the live components of these conductors can lead to lethal electric shocks. WARNING: Unplugging the slot-in DC conductors from the terminals when Powerwall+ is under load may cause an electric arc, which can result in electric shock and/or burns. WARNING: Do not touch any live components on Powerwall+. WARNING: Prior to performing any work on Powerwall+, disconnect it from AC voltage sources, as described in Appendix J: Servicing Powerwall+ on page 119. WARNING: The Powerwall+ DC inputs are not intended for connection to a battery or any other type of DC source except for a PV array. NOTE: Refer to Appendix B: Wiring Reference on page 70 for an overview of the wiring compartment as well as all wiring requirements and recommendations, including wire colors and gauges. Make DC Power Connections 1. Ensure Powerwall+ is not connected to AC power. 2. If an external DC disconnect means is available, open the external DC disconnect switch. 3. Ensure that there is no voltage on the DC inputs of Powerwall+. 4. Connect the PV array equipment grounding conductor to an equipment grounding terminal in the solar assembly. Figure 8. Solar Equipment Grounding Conductor 32Powerwall+ Installation Manual 5. For each conductor: a. Strip the conductor insulation up to 0.4 inches (10 mm). If the conductor is ffnely stranded, provide it with a ferrule. b. Insert a 3.2 mm (1/8 in) slotted screwdriver into the actuation shaft to open the terminal. c. Insert the conductor as far as possible into the terminal and remove the screwdriver from the actuation shaft to close the terminal. d. Perform a pull test to ensure the conductor is fully seated in the terminal. Figure 9. Powerwall+ DC Wiring WARNING: Inserting conductors into the actuation shafts rather than the terminals can result in ffre. Ensure conductors are inserted in the terminals. • Ensure the conductors are inserted into the terminal points (round openings) as far as they will go and not into the actuation shafts (rectangular openings) • Ensure that the terminal points are allocated to the correct conductors • Ensure that the conductors are plugged completely into the terminal points up to the insulation NOTE: The building and the system shall be marked in accordance with Section 690.56(C) of the NEC (NFPA 70) “Only conductors leaving the footprint of the array are controlled” on DC wiring. STEP 4: MAKE SOLAR DC CONNECTIONS 33Powerwall+ Installation Manual Install MPPT Paralleling Jumpers (Optional) Where the DC input current exceeds an MPPT rating of 13 A, jumpers can be used to allow a single MPPT to intake strings with a total DC input current of up to 26 A. NOTE: If needed, 4-inch jumpers can be made from 10 AWG copper wire. The following MPPTs can be paralleled using jumpers: • MPPT DC inputs 1 and 2 paralleled with both positive and negative • MPPT DC inputs 3 and 4 paralleled with both positive and negative Install Jumpers 1. Land string with 13+ A (IMP) on MPPT 1. 2. Install jumper from MPPT 1 to MPPT 2. 3. Land string with 13+ A (IMP) on MPPT 3. 4. Install jumper from MPPT 3 to MPPT 4. Figure 10. Parallel Strings per MPPT STEP 4: MAKE SOLAR DC CONNECTIONS 34Powerwall+ Installation Manual Figure 11. Paralleled MPPTs with Parallel Strings STEP 4: MAKE SOLAR DC CONNECTIONS 35Powerwall+ Installation Manual Install Mid-Circuit Interrupters in PV Array The Tesla Mid-Circuit Interrupter (MCI) is used within PV strings and arrays to meet the Rapid Shutdown requirements of NEC Article 690.12 (2017 and 2020 editions). For information on how the Tesla MCI functions with Powerwall+ as a Photovoltaic Rapid Shutdown System (PVRSS), see Appendix E: Solar Assembly Rapid Shutdown on page 81. NOTE: The Tesla MCI is also referred to as the Tesla Solar Shutdown Device. Figure 12. Mid Circuit Interrupter (MCI) MCI Locations Always connect an MCI to one end of a series string. Whether the MCI is connected to the “ffrst” or “last” module in a series string is not important. The quantity and placement of additional MCIs within the string varies by the type of PV panel used. The following table lists the modules that have been certiffed as part of a PV Rapid Shutdown Array (PVRSA) when installed together with Powerwall+ and Tesla MCI. This certiffcation is in accordance with the 2017 and 2020 editions of the NEC, Article 690.12 (B)(1), and deffnes the required MCI counts as shown in the table. Table 1. Modules Certiffed with Powerwall+ and MCI as PV Rapid Shutdown Arrays Brand Model Required MCIs Hanwha Q.Peak Duo Flat PV modules: • Q.PEAK DUO BLK-G5/SC315-320 • Q.PEAK DUO BLK-G6+/SC330-345 1 MCI per 3 modules Tesla Solar Roof V3 (SR60T1)1 MCI per 10 modules Systems using PV modules not certiffed as part of a PVRSA as deffned above are subject to Article 690.12(B) (2)(2) of the applicable NEC (2017 or 2020), which states that all conductors inside an array’s boundary must be reduced to 80 V or less within 30 seconds of rapid shutdown. NOTE: MCIs are not required if the installation is not required to comply with Rapid Shutdown requirements (NEC 690.12). STEP 4: MAKE SOLAR DC CONNECTIONS 36Powerwall+ Installation Manual Installation Best Practices • Install the Tesla MCI in line with the PV modules using standard MC4 connectors • Ensure the MCI does not contact the glass or backside of a PV module • For flat plate solar panel installations, ensure the MCIs do not directly contact the roof. For Solar Roof installations, see the Solar Roof Installation Manual for proper mounting guidance • Always secure the MCI with appropriate wire management • Ensure no more than 5 MCIs are connected per PV string • Ensure that total DC circuit length, from + MPPT terminal to - MPPT terminal (including module wire leads for any individual string), does not exceed 1000 ft (300 m). Note that for strings in parallel, only consider the string with the longer wire distance ◦ For example, a PV home run with 200 ft of wiring on the roof should not exceed 400 ft (120 m) • Keep a completed string diagram indicating the layout of the array and the placement of each MCI (either a paper copy, electronic copy available in the ffeld, or both) Installing MCIs 1. Connect the positive and negative leads of the MCI to the corresponding positive / negative MC4 terminals of the PV modules or solar roof modules. Figure 13. MCIs Installed in Line with PV Modules 2. For flat plate solar panel installations, attach the MCI under the module frame. a. To attach the MCI using ZEP Home Run wire clips, install the (2X) clips to the module frame and clip both ends of the MCI leads, then slot the MCI underneath the metal frame. STEP 4: MAKE SOLAR DC CONNECTIONS 37Powerwall+ Installation Manual b. To bolt the MCI to an existing hole in the frame, align the MCI through hole with the frame and use the appropriate mounting hardware as deffned in MCI Mounting Hardware Sizing on page 39. NOTE: Follow all module manufacturer’s instructions before mounting the MCI to the module frame. Ensure there is at least 0.5 in (13 mm) between the MCI and the module substrate, and only mount the MCI using existing holes in the module frame. NOTE: For rail PV systems, use any of the mounting holes to mount the MCI directly to the rail (see MCI Mounting Hardware Sizing on page 39 for mounting hardware sizes) or use the manufacturer’s module level power electronic mounting bracket and mount the MCI to the bracket. 3. For Solar Roof installations, mount the MCIs directly to the roof, directly above the Tile Footlaps and positioned at a slight angle as pictured below. Use the appropriate mounting hardware as deffned in the table below. STEP 4: MAKE SOLAR DC CONNECTIONS 38Powerwall+ Installation Manual Table 2. MCI Mounting Hardware Sizing Through Hole Hardware A Wood Screw (No. 8) Screw (up to M4 (5/32")) B Bolt (up to M8 (5/16")) C Nail (8D) Screw (up to M4 (5/32")) STEP 4: MAKE SOLAR DC CONNECTIONS 39Powerwall+ Installation Manual STEP 5: INSTALL BACKUP SWITCH Inspect the Meter and Meter Socket Before installing the Backup Switch, perform the following inspection steps, documenting with photos throughout the inspection. • If the meter socket jaws have plastic insulating guides: 1. Hold the Backup Switch up to the meter socket and visually inspect the alignment of blades to jaws. 2. If one or more jaws are misaligned with the Backup Switch blades, either adjust the plastic insulating guides using fully insulated tools, or contact the Utility to make the adjustment. Figure 14. Meter Socket Jaw Plastic Insulating Guides • Conffrm the Utility electric meter is in good health: ◦ Conffrm the Utility electric meter is functional ▪ If the meter has an LCD screen, ensure it cycles through menu options ▪ If the meter is a mechanical meter, ensure the rotating disk is spinning ◦ Conffrm the meter panel, meter, and main breaker are rated no higher than 200 A continuous ◦ Conffrm the blades have no signs of damage, arcs, or misalignment • Conffrm the meter socket enclosure is in good health ◦ Conffrm the jaws have no signs of damage, arcs, or misalignment ◦ Conffrm the enclosure is not damaged by rust or corrosion ◦ Conffrm there are no signs of water ingress If either the meter or meter socket displays damage or is otherwise not in good health as deffned above, stop the installation and work with the customer to have the meter socket replaced before installing the Backup Switch. 40Powerwall+ Installation Manual Remove the Meter WARNING: Before removing the meter, ensure that all loads are switched ofi and all panel disconnect switches are locked out. WARNING: Even though circuits have been turned ofi and are not under load, service equipment may still be live. Wear all electrical PPE as deffned in Required Tools on page 17. 1. Switch ofi breakers for any parallel generation sources, including Powerwalls, solar inverters, and generators. 2. Switch ofi all load breakers. 3. Switch ofi the main service disconnect. 4. For ring type meter sockets: Remove the meter sealing ring while wearing cut resistant gloves. 5. For ringless meter sockets: Remove the meter socket enclosure cover. STEP 5: INSTALL BACKUP SWITCH 41Powerwall+ Installation Manual 6. Using the meter puller, remove the meter: a. Slide the meter puller over the meter. NOTE: If the meter puller has vents, orient it so that the vents are at the top of the meter puller. b. Push until the clips snap over the meter’s metal band. Be careful to grip only the meter and not the edge of the enclosure. c. Rock up and down to loosen the blades. STEP 5: INSTALL BACKUP SWITCH 42Powerwall+ Installation Manual d. Pull the meter away from the base. Install the Backup Switch WARNING: Even though circuits have been turned ofi and are not under load, conductors may still be live. Wear all electrical PPE as deffned in Required Tools on page 17. 1. Inspect the meter socket to ensure it is in suitable condition to install the Backup Switch. The meter socket should not display any signiffcant damage, rust, or corrosion, or any evidence of thermal events. NOTE: If signiffcant damage is observed, stop the installation and work with the customer to have the meter socket replaced before installing the Backup Switch. 2. Align the Backup Switch with the meter socket and, using a rocking motion, plug it into place. NOTE: The Backup Switch must be fully inserted to ensure the system is grounded. STEP 5: INSTALL BACKUP SWITCH 43Powerwall+ Installation Manual Figure 15. Installing the Backup Switch on a Ring Type Socket (left) and on a Ringless Socket (right) 3. For ring type meter sockets: Install the sealing ring to secure the Backup Switch to the meter socket. NOTE: Ensure the sealing ring is oriented such that the FRONT arrow etched into the ring faces toward the meter, and not the panel. The front wall of the sealing ring is shallower than the rear wall to match the proffle of the Backup Switch; thus, the sealing ring cannot be installed if it is not oriented correctly. STEP 5: INSTALL BACKUP SWITCH 44Powerwall+ Installation Manual 4. For ringless meter sockets: Install the meter socket cover. Reinstall the Meter WARNING: Even though circuits have been turned ofi and are not under load, conductors may still be live. Wear all electrical PPE as deffned in Required Tools on page 17. 1. Hold the meter up to the Backup Switch to inspect the alignment of the meter blades to the Backup Switch jaws. If the meter blades do not align with the Backup Switch jaws, replace either the Backup Switch or the meter before moving forward. 2. Align the meter with the Backup Switch, and push it onto the Backup Switch. STEP 5: INSTALL BACKUP SWITCH 45Powerwall+ Installation Manual 3. Install the sealing ring over the meter. NOTE: Ensure the sealing ring is oriented such that the FRONT arrow etched into the ring faces toward the meter, and not the panel. The front wall of the sealing ring is shallower than the rear wall to match the proffle of the meter; thus, the sealing ring cannot be installed if it is not oriented correctly. Inspect the Backup Switch Installation Perform a pull test to ensure the Backup Switch feels secure in the meter socket. If the Backup Switch does not feel secure, contact installation support or your supervisor. STEP 5: INSTALL BACKUP SWITCH 46Powerwall+ Installation Manual Connect Powerwall+ to the Backup Switch 1. Hardwired communications enter the Backup Switch via the conduit hub. Run either LFNC or TCER cable using an appropriate ½-inch NPT fftting. Installer preference, Utility, and/or AHJ requirements will dictate whether LFNC or TCER cable should be used. 2. Run the 4-conductor communication cable through the conduit or cable gland and pull it through the Backup Switch conduit hub. 3. Wire the 4-conductor communication cable to the Backup Switch connector: WARNING: Always wire the Backup Switch connector before plugging it in to the Backup Switch. The force exerted to lock each terminal can potentially damage the Backup Switch, so wires must be placed and terminals locked before plugging the connector into the Backup Switch. a. Strip the communication wire jacket about 3 inches. There is no need to strip the individual communication wire, as the connector is insulation displacing. b. Cut back the drain wire. The drain wire should be terminated at the Powerwall+ solar assembly ground terminal only. c. Using a 2 mm slotted screwdriver, open each connector lever. d. Insert each conductor as far as possible into the terminal and then use the screwdriver to close the connector lever. NOTE: Reference Backup Switch Wiring on page 74 for the correct wire order in the Backup Switch connector. 4. Plug the connector into the corresponding connector socket on the bottom of the Backup Switch. 5. Adjust wire slack, or coil the wires as necessary. NOTE: Leave approximately 5 inches of slack in the wiring. 6. Secure the conduit hub: STEP 5: INSTALL BACKUP SWITCH 47Powerwall+ Installation Manual a. Mount the conduit hub over the communication cable connector. b. Install and tighten the (3X) T20 Torx screws to 1.5 Nm (hand-tight) to hold the hub in place. c. Route the 4-conductor communication cable from the Backup Switch to Powerwall+. NOTE: Provide attachment points to secure cable/LFNC to wall as deffned by NEC. 7. Wire the 4-conductor communication cable to the Powerwall+ solar assembly: a. Strip the communication wire jacket about 3 inches and strip each conductor 0.4 inches (10 mm). b. Using a 2 mm slotted screwdriver, open each connector lever. c. Insert each conductor as far as possible into the terminal and then use the screwdriver to close the connector lever. NOTE: Reference Backup Switch Wiring on page 74 for the correct wire order in the Backup Switch connector. d. (Optional) If the drain wire is present, insert it in the solar assembly ground terminal. STEP 5: INSTALL BACKUP SWITCH 48Powerwall+ Installation Manual NOTE: See Plan Distance Between Components on page 20 for the maximum distance between components. STEP 5: INSTALL BACKUP SWITCH 49Powerwall+ Installation Manual STEP 6: MAKE AC POWER CONNECTIONS 1. Disconnect the AC circuit breaker of the main service disconnect and secure it against reconnection. 2. Connect the Powerwall+ AC power conductors to the main panel or sub panel according to the electrical service type. NOTE: Each Powerwall+ requires a 50 A circuit breaker. This breaker serves as the disconnect for Powerwall+ and must be wired in accordance with local wiring codes and regulations. 3. (Conduit installations only) Run conduit as needed and attach the conduit fftting to the solar assembly AC wiring knockout. 4. Run the AC power conductors and the equipment grounding conductor from the main panel through the conduit or cable gland and pull them into the solar assembly wiring compartment. NOTE: See Mount the Solar Assembly on page 29 for a labeled diagram of the solar assembly knockouts. 5. Connect the Powerwall+ equipment grounding conductor to an equipment grounding terminal in the solar assembly. Figure 16. Equipment Grounding Conductor 6. For each AC conductor: a. Strip the conductor insulation up to 10 mm (0.39 in). If the conductor is ffnely stranded, provide it with a ferrule. b. Insert a 2.5 mm (3/32 in) slotted screwdriver into the actuation shaft to open the terminal. c. Insert the conductor as far as possible into the terminal and remove the screwdriver from the actuation shaft to close the terminal. 50Powerwall+ Installation Manual d. Perform a pull test to ensure the conductor is fully seated in the terminal. WARNING: A neutral is required. Figure 17. Powerwall+ AC Wiring WARNING: Inserting conductors into the actuation shafts rather than the terminals can result in ffre. Ensure conductors are inserted in the terminals. • Ensure the conductors are inserted into the terminal points (round openings) as far as they will go and not into the actuation shafts (rectangular openings) • Ensure that the terminal points are allocated to the correct conductors • Ensure that the conductors are plugged completely into the terminal points up to the insulation STEP 6: MAKE AC POWER CONNECTIONS 51Powerwall+ Installation Manual UL 1741 PCS Requirements UL 1741 PCS compliance may be required by the interconnecting utility or site host. If UL 1741 PCS compliance is required according to applicable site design, follow the guidance in this section. The Tesla battery system is UL 1741 PCS-compliant with the following nominal voltages: • 240V ( Split Phase) Compliance with UL 1741 PCS can be achieved for system sizes under 200A with a Backup Switch according to the requirements below. Busbar Labeling Requirements The PCS-controlled current setting for each busbar shall be indicated with a ffeld-applied marking label on the conductor or in close proximity to the busbars. Refer to the label below, fflling the blank with the following value: Figure 18. PCS Field Marking Label CT Labeling Requirements The following label must be posted near the installation of any Neurio CTs: Figure 19. CT Field Marking Label Required UL 1741 PCS Compliance Information NOTE: The Tesla Powerwall+ system is certiffed to UL 1741 PCS for the energy storage system (ESS) operating mode of import only. The installer can select two modes of operation for the system: No Site Export, PV Only Export. 1. PV ONLY EXPORT: The battery will not export beyond the site meter, other than inadvertent export. The export at the site meter will be limited to the export from as measured by the solar meter. 2. NO SITE EXPORT: The battery and solar will not export beyond the site meter, other than inadvertent export. STEP 6: MAKE AC POWER CONNECTIONS 52Powerwall+ Installation Manual NOTE: To achieve UL 1741 PCS Import Only behavior, either PV Only Export or NO SITE EXPORT must be selected. When the selected Grid Code applies to a region that requires UL 1741 PCS, such as California UL 1741 SA, the default setting is PV Only Export. In the locally hosted Conffguration Interface it is possible to further restrict the system to NO SITE EXPORT; however once set, it is not possible to change back to PV Only Export. It is not possible to conffgure the system to allow BATTERY EXPORT. NOTE: The maximum operating currents in controlled busbars or conductors are limited by the settings of the power control system (PCS) and may be lower than the sum of the currents of the connected controlled power sources. The settings of the PCS controlled currents may be used for calculation of the design currents used in the relevant sections of NEC Article 690 and 705. NOTE: This system is equipped with a power control system (PCS) which is suitably rated to provide branch circuit overcurrent protection. The controlled current setting shall not exceed the rating of any controlled busbars or conductor ampacity. WARNING: Conffguration of power control settings system or changes to settings shall be made by qualiffed personnel only. Incorrect conffguration or setting of the power control settings may result in unsafe conditions. WARNING: Only qualiffed personnel shall be permitted to set or change the setting of the maximum operating current of the PCS. The maximum PCS operating current setting shall not exceed the busbar rating or conductor ampacity of any PCS controlled busbar or conductor. NOTE: Maximum Overcurrent protection rating for PCS controlled Conductor: 200 A. NOTE: Maximum PCS Controlled Current setting: 200 A. Figure 20. Controlled Conductors in a Powerwall+ with Backup Switch System STEP 6: MAKE AC POWER CONNECTIONS 53Powerwall+ Installation Manual STEP 7: INSTALL OPTIONAL SYSTEM SHUTDOWN SWITCH Powerwall+ can be wired to a System Shutdown Switch that manually disables the solar assembly. When the System Shutdown circuit is opened, the AC relay internal to Powerwall+ is opened, thus disabling solar output. The System Shutdown Switch is wired through a low voltage, 12 V DC, 1 A control circuit connected to the Powerwall+ RSD ports. For more information on the function of the System Shutdown Switch, see Appendix E: Solar Assembly Rapid Shutdown on page 81. To install the System Shutdown Switch: 1. Remove the factory-installed jumper from the RSD IN / RSD Out ports. See Appendix B: Wiring Reference on page 70 for a detailed wiring reference. 2. Using minimum 24 AWG conductors, with wiring methods according to code, connect the RSD ports to a suitable DC switch (requirements below). 54Powerwall+ Installation Manual Tesla recommends that all System Shutdown Switches observe the following requirements. • Listed or Recognized as "Emergency Stop Button", "Emergency Stop Device", "Emergency Stop Unit", meeting one of the following standards: ◦ UL 508 "Industrial Control Equipment" ◦ UL 60947-1 "Low-voltage switchgear and control gear- Part 1: General Rules" AND Part 5-1: Control Circuit Devices and Switch Elements - Electromechanical Control Circuit Devices" AND UL 60947-5-5: Mechanical and functional performance requirements • Rated for at least 12 V, 1 A • Outdoor rated (NEMA 3R or higher) • Terminals must accept 24 AWG wire or larger STEP 7: INSTALL OPTIONAL SYSTEM SHUTDOWN SWITCH 55Powerwall+ Installation Manual Recommended System Shutdown Switch Components The following product (composed of all parts listed below) meets all above requirements for this application: Eaton M22-PVT Emergency Stop Button Eaton M22-I1-PG Emergency Stop Enclosure Eaton M22-K01PV6 Emergency Stop Contactor Block (240V, 6A) Low voltage communication wire (Powerwall+ communication cable preferred) ½-inch Strain Relief or equivalent (4) Fasteners and anchors for the 5/16-inch (8 mm) mounting holes on the enclosure Installation Guidelines for the System Shutdown Switch • Installed externally in a readily accessible location, preferably near utility meter • Maximum low voltage wire run from switch does not exceed 150 ft (45 m) • Control circuit must be installed as Type TC-ER or within an appropriate raceway STEP 7: INSTALL OPTIONAL SYSTEM SHUTDOWN SWITCH 56Powerwall+ Installation Manual STEP 8: COMPLETE THE INSTALLATION Plan Internet Connection for Powerwall+ Internet connectivity is required to receive the full 10-year Powerwall+ warranty, and for the customer to see their system in the Tesla App. For best performance, ensure Ethernet and Wi-Fi connections are both conffgured during commissioning. Powerwall+ will automatically select the network option with best connection. Cellular is available only as a backup connection when Wi-Fi and Ethernet connections are lost. Cellular should not be relied on as the default connection method. Install Ethernet Connection • Ethernet cable must be CAT5 (24 AWG) cable at minimum. • If not possible to run an Ethernet cable directly to the customer’s network router, Powerline Ethernet socket adapters may be used. • See Powerwall+ Wiring on page 70 for the position of the Ethernet port. Close the Wiring Compartments and Turn the System On 1. Before closing any installed hardware, take photos of the completed wiring in the Powerwall+, Backup Switch, and main distribution board. 2. Ensure that all conduit junctions and cable entry points are secure and properly sealed. 3. Arrange all wires neatly inside the Powerwall+ wiring compartments. 4. Mount the solar assembly door. 5. Clean out the solar assembly enclosure and vacuum out any dust. 6. Install the grounding jumper: a. Connect the jumper to the grounding bolt on the inside of the solar enclosure door. 57Powerwall+ Installation Manual b. Install the provided M5 nut with 8 mm drive on the grounding bolt and torque to 1.5 - 2.5 Nm to secure the jumper in place. Figure 21. Grounding Jumper Secured to Door 7. Close the solar assembly door and latch it shut. 8. Using a right angle Phillips head screwdriver, tighten the captive screw on the solar assembly door to secure it. WARNING: Tightening this screw is absolutely necessary to prevent untrained persons from opening the solar assembly door, which would expose them to energized conductors. NOTE: If desired, the solar assembly door can be locked shut by placing a lock on the door hasp. STEP 8: COMPLETE THE INSTALLATION 58Powerwall+ Installation Manual NOTE: A luggage lock, such as a Master Lock 120 series, can be used to lock the solar assembly shut. 9. Use a breaker label sheet to clearly label the circuit breakers. 10. Install signage complying with local AHJ requirements at the panel and at the Rapid Shutdown initiator. Depending on the installation, the Rapid Shutdown initiator will be the Powerwall+ Enable switch AND/OR at the System Shutdown Switch. See Appendix E: Solar Assembly Rapid Shutdown on page 81 for a label example and diagrams of label placement in common system conffgurations. 11. Switch on the AC circuit breaker for Powerwall+. 12. Switch on Powerwall+ by moving the Enable switch on the right side of the unit to the ON position. CAUTION: Always leave site with Powerwall+ breaker closed for battery to maintain a base level of charge. Leaving the Powerwall+ disconnected from AC for extended periods increases risk of damage. STEP 8: COMPLETE THE INSTALLATION 59Powerwall+ Installation Manual Conffgure the System 1. Locate the label on the back of the owner's manual or on the inside of the solar assembly enclosure. Using a smartphone, scan the QR code on the label to establish Wi-Fi connection with Powerwall+. NOTE: To connect to Powerwall+ via Ethernet, connect a computer to the Ethernet port in the solar assembly with a standard CAT5 Ethernet cable. See Solar Assembly Wiring on page 72 for the Ethernet port location. 2. Open a browser and navigate to 192.168.91.1. 3. Log in to the Conffguration Interface: a. Enter the email address of the installer who is carrying out the work. b. Enter the password on the label (see label location above). c. Select Continue. STEP 8: COMPLETE THE INSTALLATION 60Powerwall+ Installation Manual NOTE: If the Conffguration Interface does not load for more than 40 seconds, refresh the webpage. 4. Connect Powerwall+ to the Internet by the following means: NOTE: Either an Ethernet or a Wi-Fi connection must be connected. If the Automatic Powerwall Setup succeeds and the cellular connection is strong, the customer can connect their system to Wi-Fi via the Tesla mobile app and no further action is required by the installer. If the cellular connection is not strong, proceed to the following instructions on conffguring Wi-Fi and/or Ethernet. Wi-Fi (2.4 or 5 GHz)Ethernet NOTE: The customer can conffgure Wi-Fi in the Tesla mobile app. If they do not have the Tesla mobile app or are otherwise unable to conffgure Wi-Fi in the app, conffgure Wi-Fi in the Conffguration Interface as follows: ◦ Click the arrow for Wi-Fi ◦ Scan and locate the home Wi-Fi network name (SSID) ◦ Enter the homeowner’s network password ◦ Click the blue arrow Once an Ethernet connection has been established, Ethernet is conffgured for DHCP by default. To conffgure a static connection: ◦ In the Conffguration Interface, click the arrow for Ethernet ◦ Choose Static ◦ Click Connect 5. Click Check Connection to verify that the Internet connection is working. Click Continue. 6. Review any Automatic Powerwall Setup errors, and follow the Conffguration Interface steps to address any errors and complete conffguration. NOTE: For additional conffguration information and troubleshooting steps, see the Powerwall+ Configuration Guide on Partner Portal. Backup Switch Ofi-Grid Test 1. Conffrm the correct power flow on the Conffguration Interface landing page. 2. Use the GO OFF GRID button to perform ofi-grid testing. Ensure the STOP SYSTEM button appears to indicate the system is currently running. CAUTION: Do NOT use the Backup Switch manual override to perform ofi-grid testing. Only use the button in the Conffguration Interface. Finish and Demonstrate the Installation 1. After installation is complete, remove the protective fflm from Powerwall+. 2. Remove any packaging materials. 3. Ask the homeowner to download and install the Tesla mobile app and connect to the system. 4. Demonstrate the capabilities of the Tesla mobile app, such as how to change the operation mode. 5. Leave the Powerwall+ Owner’s Manual with the owner of the newly installed system. 6. Archive the photos from the installation. STEP 8: COMPLETE THE INSTALLATION 61Powerwall+ Installation Manual Technical Support Resources for Certiffed Installers, including service request forms and the latest versions of installation manuals, are available within the Tesla Partner Portal: https://partners.tesla.com Maintenance Powerwall+ does not require pre-scheduled preventative maintenance. The only maintenance required by an owner is to keep the unit connected to the internet and free and clear of debris, especially around the air intake and exhaust. To clean Powerwall+, use a soft, lint-free cloth. If needed, the cloth can be dampened with mild soap and water only. Do not use cleaning solvents to clean Powerwall+, or expose Powerwall+ to flammable or harsh chemicals or vapors. STEP 8: COMPLETE THE INSTALLATION 62Powerwall+ Installation Manual APPENDIX A: POWERWALL+ MOUNTING DETAILS Powerwall+ Space Requirements Figure 22. Powerwall+ Mounting Bracket Dimensions and Space Requirements 63Powerwall+ Installation Manual Minimum lateral wall space 38 in (960 mm) Minimum clearance from left side (air intake)2 in (50 mm) Minimum clearance from right side (air exhaust)6 in (150 mm) Minimum clearance above a single Powerwall+2 in (50 mm) Minimum clearance above side-by-side Powerwall+12 in (300 mm) Minimum clearance between side-by-side Powerwall+10 in (250 mm) Maximum height above ground 39.5 in (1 m) to bottom of unit Maximum slope +/– 2° side-to-side +/– 5° front-to-back NOTE: Powerwall+ has a pump and fan that produce a gentle hum during operation, comparable to a typical refrigerator. The noise level depends on the ambient temperature and the power level of operation. Consider these noise levels when choosing where to install Powerwall+. APPENDIX A: POWERWALL+ MOUNTING DETAILS 64Powerwall+ Installation Manual Mounting Bracket Anchoring Details NOTE: The details below are minimum guidelines and are not guaranteed to be applicable. Refer to local building codes to ensure the use of appropriate fasteners. Wood Studs (spaced at 12, 16, 20 or 24 inches) If anchoring directly into wood studs, use at least six (one in each corner, as shown in blue in the diagram on the right) minimum ¼-inch wood screws with washers, of sufficient length for at least 2.5 in embedment into the studs. For some seismic requirements, use at least twelve wood screws. APPENDIX A: POWERWALL+ MOUNTING DETAILS 65Powerwall+ Installation Manual Wood Studs (spaced at 12, 16, 20 or 24 inches) If anchoring to blocking between wood studs, use minimum 2 x 4 in blocks, end-nailed into studs with two 16d nails or toe- nailed into studs with four 8d nails. Use at least six (one in each corner, as shown in blue in the diagram on the right) minimum ¼-inch wood screws with washers, of sufficient length for at least 2.5 inches embedment into the blocking. For some seismic requirements, use at least twelve wood screws. Plywood If anchoring to plywood wall material, the plywood must be minimum 1/2-inch thick. Use at least six (one in each corner, as shown in blue in the diagram on the right) minimum ¼-inch wood screws with washers, of sufficient length for at least 1/4 inch beyond the backside of the plywood. For some seismic requirements, use at least twelve wood screws. APPENDIX A: POWERWALL+ MOUNTING DETAILS 66Powerwall+ Installation Manual Metal Studs (spaced at 12, 16, 20 or 24 inches) If anchoring directly to metal studs, studs must be minimum 18 gauge. Use at least six (one in each corner, as shown in blue in the diagram on the right) #14 sheet metal screws with washers, of sufficient length to penetrate at least 3 threads beyond the stud. For some seismic requirements, use at least twelve sheet metal screws. Metal Studs (spaced at 12, 16, 20 or 24 inches) If anchoring to backing between metal studs, studs must be minimum 25 gauge, and backing must be minimum 22 gauge. Use at least twelve (two in each corner, as shown in blue in the diagram on the right) #14 sheet metal screws with washers, of sufficient length to penetrate at least 3 threads beyond the backing. For some seismic requirements, use at least twenty-four sheet metal screws. APPENDIX A: POWERWALL+ MOUNTING DETAILS 67Powerwall+ Installation Manual Metal Studs (spaced at 12, 16, 20 or 24 inches) If anchoring to backing between metal studs in an outdoor high wind area, studs must be minimum 25 gauge, and backing must be minimum 22 gauge. Use at least eighteen (three in each corner, as shown in blue in the diagram on the right) #14 sheet metal screws with washers, of sufficient length to penetrate at least 3 threads beyond the backing. For some seismic requirements, use at least thirty-six sheet metal screws. Concrete or Masonry Minimum strength must be 2500 PSI (concrete) or 1500 PSI (masonry). Use at least six (one in each corner, in any available anchor slot, as shown in blue in the diagram on the right) minimum ¼-inch fasteners with washers, of sufficient length for at least 1.5 inches embedment into the material. Ensure that all fasteners are at least 1.5 inches away from the edges of masonry blocks or bricks. For some seismic requirements, use at least twelve fasteners. APPENDIX A: POWERWALL+ MOUNTING DETAILS 68Powerwall+ Installation Manual Channel Strut (Unistrut) Struts must be minimum 1-5/8 in x 1-5/8 in, 12 gauge. If mounting on wood studs, attach the strut to at least three studs (six studs for some seismic requirements), using minimum ¼-inch wood screws with washers of sufficient length for at least 2.5 in embedment into the studs. If mounting on metal studs, attach the strut to at least three studs (six studs for some seismic requirements), using at least two #14 sheet metal screws with washers per stud, of sufficient length to penetrate at least 3 threads beyond the studs. To attach the bracket to the struts, use at least six (one in each corner, as shown in blue in the diagram on the right) 1/4- inch hex head screws with washers and strut nuts. For some seismic requirements, use at least twelve screws. APPENDIX A: POWERWALL+ MOUNTING DETAILS 69Powerwall+ Installation Manual APPENDIX B: WIRING REFERENCE Powerwall+ Wiring Solar Assembly and Battery Assembly Connections Terminal Name Wire Gauge 1 Battery assembly CAN and 12V wiring terminal Pre-wired harness 2 Battery assembly AC wiring terminal Pre-wired harness 70Powerwall+ Installation Manual Battery Assembly Wiring NOTE: In a single Powerwall+ installation, there is no need to open the battery assembly wiring compartment. Only open this wiring compartment if completing a stacked Powerwall+ and Powerwall installation. Table 3. Powerwall+ Communication Wiring Powerwall+ Terminal Recommended Wire Color Wire Gauge 1 12V + (Logic +)Red 18 - 16 AWG (0.8 - 1.5 mm2) 2 GND (Earth)Black 18 - 16 AWG (0.8 - 1.5 mm2) 3 CN + (CAN HI)Blue 18 - 16 AWG (0.8 - 1.5 mm2) 4 CN – (CAN LO)Orange 18 - 16 AWG (0.8 - 1.5 mm2) APPENDIX B: WIRING REFERENCE 71Powerwall+ Installation Manual Solar Assembly Wiring DC Wiring Terminal Name Recommended Wire Color Wire Gauge Strip Length 1 DC Isolator N/A Pre-wired harness - 2 AC Power (L1, L2)Black, Red Pre-wired harness - 3 MPPT positive DC inputs (PV 1+, 2+, 3+, 4+) Red 8 - 24 AWG (0.2 - 10 mm2)1 0.4 in (10 mm) 4 MPPT negative DC inputs (PV 1-, 2-, 3-, 4-) Black 8 - 24 AWG (0.2 - 10 mm2)1 0.4 in (10 mm) 5 Ground Conductors Green 4 - 20 AWG (0.5 - 25 mm2)1 0.7 in (18 mm) 6 Solar Assembly Rapid Shutdown Gray, Black 8 - 24 AWG (0.2 - 10 mm2)0.4 in (10 mm) 7 CAN Communication Blue, Yellow 8 - 24 AWG (0.2 - 10 mm2)0.4 in (10 mm) 1 Use only copper conductors. APPENDIX B: WIRING REFERENCE 72Powerwall+ Installation Manual Solar Assembly AC Power and Communication Wiring Table 4. AC Power Wiring Terminal Name Recommended Wire Color Wire Gauge Strip Length 1 L1 (Line 1)Black 10 - 6 AWG (6 - 16 mm2)0.7 in (18 mm) 2 L2 (Line 2)Red 10 - 6 AWG (6 - 16 mm2)0.7 in (18 mm) 3 N White 10 - 6 AWG (6 - 16 mm2)0.7 in (18 mm) Table 5. Jump Start Wiring Terminal Name Recommended Wire Color Wire Gauge Strip Length 4 12V + (Logic +)Red 18 - 16 AWG (0.8 - 1.5 mm2)0.4 in (10 mm) 5 GND (Earth)Black 18 - 16 AWG (0.8 - 1.5 mm2)0.4 in (10 mm) Table 6. Communication (Backup Switch) Wiring Terminal Name Recommended Wire Color Wire Gauge Strip Length 6 12V + (Logic +)Red 18 - 16 AWG (0.8 - 1.5 mm2)0.4 in (10 mm) 7 GND (Earth)Black 18 - 16 AWG (0.8 - 1.5 mm2)0.4 in (10 mm) 8 CN +Blue 18 - 16 AWG (0.8 - 1.5 mm2)0.4 in (10 mm) 9 CN -Orange 18 - 16 AWG (0.8 - 1.5 mm2)0.4 in (10 mm) Table 7. External CAN Wiring Terminal Name Recommended Wire Color Wire Gauge Strip Length 10 12V + (Logic +)Red 18 - 16 AWG (0.8 - 1.5 mm2)0.4 in (10 mm) 11 GND (Earth)Black 18 - 16 AWG (0.8 - 1.5 mm2)0.4 in (10 mm) Table 8. Ethernet Port Terminal Name Wire Gauge 12 Ethernet port 24 AWG CAT5 or better APPENDIX B: WIRING REFERENCE 73Powerwall+ Installation Manual Backup Switch Wiring Table 9. Backup Switch Wiring Terminal Name Recommended Wire Color Wire Gauge 1 12V + (Logic +)Red 18 - 16 AWG (0.8 - 1.5 mm2) 2 GND (Earth)Black 18 - 16 AWG (0.8 - 1.5 mm2) 3 CN +Blue 18 - 16 AWG (0.8 - 1.5 mm2) 4 CN -Orange 18 - 16 AWG (0.8 - 1.5 mm2) 5 RS-485 - (not used)Black 24 - 16 AWG (0.2 - 1.5 mm2) 6 RS-485 + (not used)Red 24 - 16 AWG (0.2 - 1.5 mm2) 7 Reset button -- 8 Manual Override -- APPENDIX B: WIRING REFERENCE 74Powerwall+ Installation Manual APPENDIX C: SYSTEM WIRING DIAGRAMS Whole Home Backup Figure 23. Powerwall+ with Backup Switch Installed with Meter Load Center 75Powerwall+ Installation Manual APPENDIX D: INVERTER SETTINGS Inverter settings must be conffgured in advance by Tesla. Talk to your Tesla representative if any of the default settings should be modiffed. The defaults for the inverter follow each region’s grid code. Voltage Ride-Through The inverter has ffve voltage and time setpoints for low voltage ride-through (LVRT), conffgurable to the following ranges (measured as Line-ground). Table 10. Inverter LVRT Settings Parameter Voltage Range Default Values for 240 V Time (sec) LVRT Point 1 240V/208V 0.8 2 LVRT Point 2 240V/208V 0.6 1 LVRT Point 3 240V/208V 0.45 0.13 LVRT Point 4 240V/208V 0.45 0.13 The inverter has three high voltage ride-through setpoints, with one instantaneous trip voltage setting, conffgurable to the following ranges (measured as line to neutral): Table 11. Inverter HVRT Settings Parameter Voltage Range Default Values for 240 V Time (sec) HVRT Point 1 240V/208V 1.1 1 HVRT Point 2 240V/208V 1.2 0.13 HVRT Point 3 240V/208V 1.2 0.13 Table 12. Trip Accuracy Trip Setting Accuracy Voltage +/- 2% of nominal voltage Time Longer of +/- 100 mS or 1% of set point Frequency +/- 0.05 Hz Table 13. Voltage Ride-Through (L/HRVT) Ranges of Adjustability and Default Settings Operating Region Voltage at Point of Interconnection (% of Nominal Voltage) Operating Mode Ride- Through Until (s) Default Maximum Trip Time (s) Range of Adjustability Voltage Trip Magnitude (% of Nominal Voltage) Range of Adjustability Clearing Time (s) OV2 V>120 Cease to Energize N/A 0.16 N/A N/A OV1 120≥V> 100 Mandatory Operation 0.92 1 110-120 1-13 76Powerwall+ Installation Manual Operating Region Voltage at Point of Interconnection (% of Nominal Voltage) Operating Mode Ride- Through Until (s) Default Maximum Trip Time (s) Range of Adjustability Voltage Trip Magnitude (% of Nominal Voltage) Range of Adjustability Clearing Time (s) CO 110≥V>100 Continuous Operation (Volt-Watt) N/A N/A N/A N/A CO 100>V≥88 Continuous Operation N/A N/A N/A N/A UV1 88>V≥70 Mandatory Operation 20 21 50-88 21-50 UV2 70>V≥50 Mandatory Operation 10-20 11-21 50-88 11-50 UV3 50>V Momentary Cessation N/A 2 N/A 0.5-21 Frequency Ride-Through The inverter has three under-frequency (UF) and three over-frequency (OF) trip points and times, as well as one under-frequency instantaneous trip point and one over-frequency instantaneous trip point. These parameters are conffgurable to the ranges listed below: Table 14. Inverter Frequency Trip Points Parameter Voltage Range Default Values (p.u.)Time (s) LFRT Point 1 240V/208V 95.5 2 LFRT Point 2 240V/208V 57 0.13 LFRT Point 3 240V/208V 57 0.13 HFRT Point 1 240V/208V 60.5 2 HFRT Point 2 240V/208V 62 0.13 HFRT Point 3 240V/208V 62 0.13 The Frequency Ride-Through (FQRT) settings are pre-programmed in the inverter to comply with IEEE 1547 requirements as per the defaults below: Table 15. Inverter FQRT Default Settings Function Frequency (Hz)Clearing Time (s) UF1 < 57 0.16 UF2 < 59.5 2 OF1 > 60.5 2 OF2 > 62 0.16 APPENDIX D: INVERTER SETTINGS 77Powerwall+ Installation Manual Table 16. Inverter FQRT Default Settings Operating Region Frequency at Point of Interconnection Operating Mode Ride- Through Until (s) Default Maximum Trip Time (s) Range of Adjustability Frequency Range of Adjustability Clearing Time (s) OF2 f>64.0 Permissive Operation None 0.16 62.0-66.0 0.16-1,000f>65.0 [L+M] OF1 64.0≥f>63.0 Mandatory Operation (Freq-watt) 20 21 61.0-66.0 21-1,00065.0≥f>63.0[L +M] NOF 63.0≥f>60.0 Continuous Operation (Freq-Watt) Indeffnite N/A N/A N/A NUF 60.0>f≥57.0 Continuous Operation Indeffnite N/A N/A N/A UF1 57.0>f≥56.0 Mandatory Operation 20 21 50.0-59.0 21-1,00057.0>f≥50.0[L +M] UF2 56.0>f Permissive Operation None 0.16 50.0-57.0 0.16-1,00050.0>f[L+M] Accuracy Volt-Var: Reactive power Accuracy-2.5% Frequency-Watt & Volt-Watt: Power Accuracy-2% Other Function Parameters Table 17. SA11 Normal Ramp Parameters Description Value Output current rating (Aac)32/16 Minimum normal ramp-up rate (%Irated / sec)1 Maximum normal ramp-up rate (%Irated / sec)100 Output current range of function (%Irated)0% to 100% Ramp rate accuracy (%Irated / sec)2% Table 18. SA11 Soft Ramp Parameters Description Value Output current rating (Aac)32/16 Minimum normal ramp-up rate (%Irated / sec)0.1 Maximum normal ramp-up rate (%Irated / sec)100 Output current range of function (%Irated)0% to 100% Ramp rate accuracy (%Irated / sec)2% APPENDIX D: INVERTER SETTINGS 78Powerwall+ Installation Manual Table 19. SA12 Speciffed Power Factor Parameters Description Value Apparent power rating (VA)7600/3800 Output power rating (W)7600/3800 DC Input voltage range with SPF enabled (Vdc)185-515 Nominal AC voltage (Vac)240/208 AC voltage range with SPF enabled (Vac)(211.2-264), (183.04-228.8) Manufacturer's stated AC voltage accuracy (Vac)±4.8 Manufacturer's stated DC voltage accuracy (Vdc)±3 Active power range of function (W)0-7600,0-3800 Manufacturer's stated Power Factor accuracy ±0.01 Power factor settling time (sec)0.04 Minimum Inductive (underexcited) Power Factor 0.9 Minimum Capacitive (overexcited) Power Factor 0.9 Table 20. SA13 Volt/VAr Parameters Description Value Apparent power rating (VA)5769 5000 2884 2500 Reactive power rating (VAR) (Reactive Power Priority) 5769 5000 2884 2500 Output power rating (W)7600 6600 3800 3300 EUT Input voltage range with Q(V) function enabled (Vdc)N/A Nominal AC EPS voltage (V)240 208 240 208 AC EPS voltage range with function enabled (Vac)196.8 – 283.2 170.3-245.4 196.8 – 283.2 170.3-245.4 Reactive Power Accuracy (% or Var)±2.5% Ramp Rate range (VAr/sec)5769 – 32.2 5000-27.90 2884-16 2500-14 Max rated reactive Power (capacitive, overexcited) (VAr) -5769 5000 2884 2500 Max rated reactive Power (inductive, underexcited) (VAr)5769 5000 2884 2500 Maximum slope (VAr/V)1200 Deadband Range (Vac)0 - 48 Settling Time (sec)1-90 Max rated reactive Power (capacitive, overexcited) (VAr) (Active Power Priority)5769 5000 2884 2500 Max rated reactive Power (inductive, underexcited) (VAr) (Active Power Priority)5769 5000 2884 2500 APPENDIX D: INVERTER SETTINGS 79Powerwall+ Installation Manual Table 21. SA14 Frequency-Watt Parameters Description Value Output power rating (W)7600 6600 3800 3300 Nominal AC EPS voltage (V)240 208 240 208 AC frequency range with function enabled (Hz)60.017 - 65 Manufacturer's stated frequency measurement accuracy 0.05 Manufacturer's state power accuracy (%)±5 Settling Time (sec)0.5 to 3 Adjustment range of the start of frequency droop (Hz)60.017 - 65 Rate of return (%Prated/sec)1% - 100% Delay before return to full power (sec)1 – 600 Use of hysteresis Yes Table 22. SA15 Volt-Watt Parameters Description Value Output power rating (W)7600 6600 3800 3300 AC voltage range with function enabled 247.2 - 288 214.24 – 249.6 247.2 - 288 214.24 – 249.6 Nominal AC voltage (Vac)240 Manufacturer's stated AC voltage accuracy (Vac)±2% Manufacturer's stated output power accuracy (%)±3% Manufacturer's stated time accuracy (sec)0.1sec The above values are used to comply with all applicable source requirements documents (UL 1741 Supplement SA – Grid Support Utility Interactive Inverters and Converters, Sept. 7, 2016 with the source requirements document (SRD) v1.1–Hawaii Rule No. 14H Interconnection of Distributed Generating Facilities with the Distribution System; Electric Rule No.21-2015 Generating Facility Interconnections; PRC-024-2 Generator Frequency and Voltage Protective Relay Settings; Inverter Source Requirement Document of ISO New England) and any related features required therein. APPENDIX D: INVERTER SETTINGS 80Powerwall+ Installation Manual APPENDIX E: SOLAR ASSEMBLY RAPID SHUTDOWN Powerwall+ performs Rapid Shutdown (RSD) in compliance with NEC 2017 and 2020 690.12(B)(2) and 690.12(B)(1) and UL1741 standards to reduce shock hazard for emergency responders. When Powerwall+ is used with Tesla MCIs, it qualiffes as a Photovoltaic Rapid Shutdown System (PVRSS). The PVRSS is compatible with grid support functions and any limitations on the grid support functionality. The Tesla MCIs are normally open solid-state switches (no moving parts). Powerwall+ has a built-in exciter circuit that activates (closes) all MCIs via a 250 kHz AC frequency signal when the inverter is operating. Figure 24. Mid Circuit Interrupter (MCI) In compliance with PVRSS requirements, the conductors entering the solar assembly are controlled conductors. Figure 25. Controlled Conductors in Solar Inverter System 81Powerwall+ Installation Manual Rapid Shutdown Initiation Upon loss of AC power, the MCI excitation signal is lost and all MCIs will open within 30 seconds, bringing all voltages across the solar assembly and PV strings to safe levels. Rapid Shutdown Manual Initiation Rapid Shutdown can be manually initiated using the Powerwall+ Enable switch or the System Shutdown Switch if one is present. The loss of AC grid is detected and RSD is initiated. Self-Test Function Powerwall+ has an automatic self-test function. Each morning Powerwall+ performs a safety test to ensure the Rapid Shutdown can successfully limit array voltage i.e. rendered high impedance and collapse. Failure of the Rapid Shutdown self-test will initiate an alarm and a faulted state that prevents the solar assembly from operating until service is performed. Rapid Shutdown Initiator Label The system Rapid Shutdown initiator must be labeled according to Section 690.56C of the NEC marking requirements. The label must include the following wording, and must be reflective, with all letters capitalized and must be a minimum height of 9.5 mm (3/8 in) in white on a red background. RAPID SHUTDOWN SWITCH FOR SOLAR PV SYSTEM RSD Initiator Label Location The following diagram depicts Rapid Shutdown initiator label placement for each each of the two possible RSD initiators. APPENDIX E: SOLAR ASSEMBLY RAPID SHUTDOWN 82Powerwall+ Installation Manual APPENDIX F: SYSTEM ENERGY METERING Visibility on power and energy data is needed for the Powerwall+ system to operate properly. An energy meter accomplishes this by measuring voltage (by voltage tap) and current (by Current Transformer, CT) at certain points in the system. There are many possible conffgurations for installing metering depending on system design. However, there are two goals: • Metering the Site – Site meters show the overall power flow to/from a site from the Grid’s perspective. The Backup Switch performs all site metering in this system. • Metering all Solar – Solar meters capture production from PV inverter(s). A solar meter is factory installed in the solar assembly, with a Solar CT factory installed around the solar assembly AC power conductor. When the site has an additional solar inverter, an additional Solar CT must be installed to measure the inverter's production. If the additional solar inverter is within 40 ft (12 m) of the factory-installed Neurio meter in the Powerwall+ solar assembly, the additional Solar CT can be plugged into the factory-installed meter. Otherwise, an additional remote energy meter must be installed and the Solar CT plugged into the new meter. The following section outlines installing a Neurio remote energy meter to meter additional solar. NOTE: See the Powerwall+ Configuration Guide for common metering conffgurations, including where CTs should be installed and how the Meters page should be conffgured in the Conffguration Interface. Installing a Neurio Remote Energy Meter If energy metering in addition to the built-in and factory-installed Site and Solar metering is required, remote Neurio energy meter(s) may be paired with Powerwall+. Wireless Communication to the Powerwall+ The remote meter is wirelessly paired with Powerwall+ as part of the normal Powerwall+ commissioning process within the Conffguration Interface. Meter Voltage Taps The voltage line harness provided in the meter kit is used to install the corresponding voltage taps in the electrical panel. Modify the harness by combining the blue and red leads. Figure 26. Voltage Line Harness with Combined Leads 83Powerwall+ Installation Manual Voltage Tap and Current Transformer Connections Voltage taps and current transformers must be connected so that they are measuring the same phase. They must correspond according to the following table and diagram: Figure 27. Neurio W2 Voltage Tap Port (left) and CT Ports (right) Phase (Example)Meter Voltage Tap Port Meter CT Port Site L1 A CT 1 (Phase A) Site L2 B/C1 CT 2 (Phase B) Solar L1 A CT 1 (Phase A) 1With combined leads in voltage harness, ports B and C are equivalent (correspond to L2). Meter Placement and CT Wire Lengths Neurio W2 CT Wire Lengths Neurio W2 CT leads are 1.2 m (4 ft) long and can be extended to a maximum length of 12 m (40 ft) with up to one Neurio W2 CT extension kit (11 m / 36 ft, Tesla P/N 1622289-xx-y). If the distance between the meter and the CT is greater than 12 m (40 ft), the meter can be relocated, or a second meter can be used. When the meter is relocated into the main distribution board, use the antenna extension to place the antenna on the outside of the distribution board. APPENDIX F: SYSTEM ENERGY METERING 84Powerwall+ Installation Manual Current Transformer Placement For systems that require revenue grade metering, solar CTs are placed after the solar inverter breaker(s) to measure solar generation. Figure 28. CT Placement for Solar Metering APPENDIX F: SYSTEM ENERGY METERING 85Powerwall+ Installation Manual Current Transformer Orientation CTs must be installed with the label (“SOURCE THIS SIDE”) on the CT housing pointing toward the power source (service entrance / grid for site CTs, solar inverter for solar CTs). Always verify CTs are in the correct orientation by observing power flow in the Conffguration Interface. Figure 29. CT Orientation in Relation to Power Flow CT Usage CT Orientation Solar CTs CT label facing toward the solar inverter Load CTs CT label facing away from the loads Current Transformer Capacity If a site has multiple solar inverters spaced far apart, or if a main panel has two main breakers (for example, 400 A service with two 200 A breakers), a Y-splitter cable (Tesla P/N 1622286-xx-y) can be used to connect two CTs on the same phase to a single meter port. Figure 30. Y-Cables Connecting CTs on the Same Phase APPENDIX F: SYSTEM ENERGY METERING 86Powerwall+ Installation Manual Installing the Meter Using the screws provided in the meter kit, attach the mounting plate to the inside of the main distribution board or to another surface. Choose a location that takes into account the voltage line harness and CT cable lengths. Wire the Voltage Taps 1. Plug the voltage line harness into the meter in its new location. 2. Connect the voltage line harness leads to a dedicated circuit breaker (not exceeding 16 A) of corresponding phase inside the distribution board: Voltage Harness Port/Wire Color Distribution Board Connection A / Black L1 breaker terminal B / Red L2 breaker terminal C / Blue Spliced with the Red B wire N / White Neutral busbar NOTE: If a dedicated circuit breaker is not available, the voltage line harness can be spliced to existing breakers. APPENDIX F: SYSTEM ENERGY METERING 87Powerwall+ Installation Manual Figure 31. Voltage Line Harness Wired to Dedicated Breakers (Left) or Spliced to Existing Breakers (Right) APPENDIX F: SYSTEM ENERGY METERING 88Powerwall+ Installation Manual Install the Antenna To install the antenna, screw it onto the meter. It is recommended to locate the antenna outside the enclosure using the included antenna extension: • Locate a 1/2” or 3/4" knockout. • Mount the antenna by threading the extension cable through the included knockout mount and securing the mount. • Screw the antenna onto the extension cable and connect the extension cable to the meter. Figure 32. Antenna Port Locate the CTs • Place a CT on the corresponding power wire in the main distribution board after the utility meter and ahead of any loads. Be sure to orient the CTs with the “source this side” text facing the utility source. • Connect the CTs to the ports on the remote energy meter. Ensure the CTs are connected to the correct CT ports on the meter. Figure 33. Neurio W2 Meter CT Ports APPENDIX F: SYSTEM ENERGY METERING 89Powerwall+ Installation Manual APPENDIX G: INSTALLATION TROUBLESHOOTING Updating Firmware CHECK INTERNET CONNECTION to verify Powerwall+ network connection. Check for Update to verify you are on the latest ffrmware. Factory ffrmware ending in GF must be updated. Never power down or modify wiring during an update. During the update, the Powerwall+ will reboot which will cause the “TEG-xxx” Wi-Fi to disconnect. When reconnected, refresh the web page. Accessing the Powerwall+ User Interface Use Chrome: Incognito mode or Safari: Private Browsing mode. Work in one browser tab only. For security message Your connection is not private. select Advanced and Proceed to 192.168.xx.x (unsafe). For Error: Bad Credentials, select FORGOT PASSWORD to reset password. For Error: Login Error (Cannot Start Wizard), select Click for More and tick the Force Launch Wizard option. Try again. If experiencing other issues in the Commissioning Wizard, refresh the web page. Conffguring Energy Meters Conduct all CT tests with at least 1 kW of power flowing. Ensure all solar inverters are monitored with CTs. When using only 1 CT for solar, select Solar (1CT x2) on the Current Transformers screen in the Commissioning Wizard. For each CT, select the applicable function on the Current Transformers screen and perform the following steps to ensure it is in the correct location and orientation: • Adjust the Amps/kW slider to see what the CTs are reading. • Verify the on-screen values for the CT against the applicable meter (such as the solar inverter meter or utility meter). • Ensure that Solar CTs are positive when the PV array is producing power (Solar is NEVER negative during daytime). 90Powerwall+ Installation Manual Negative power flow may indicate CT is installed on the wrong phase! • If the “toward source” CT label is correctly facing the solar inverter but power flow is negative, a voltage-current mismatch is likely. • Physically move the CT to the correct phase with the label facing the correct direction. Do not use the Flip checkbox in this case. Solar CTs should only meter generation sources. It is never recommended to meter both generation and loads using the Solar (1 CT x2) option. If it is absolutely necessary to install solar and a small amount of loads together without independent metering, you must install the solar CT on the phase without any downstream loads. Use a handheld clamp or fork meter to verify CT readings. Reset the Backup Switch If experiencing issues with the Backup Switch, reset it as follows: 1. Use a Phillips PH2 screwdriver to loosen the (3X) captive fasteners holding the conduit hub in place and remove the conduit hub. 2. Push the Backup Switch RESET button (1 below). Power Cycle the System If resetting the Backup Switch does not resolve issues, power cycle the system as follows: 1. Turn ofi Powerwall+ by setting its Enable switch to the OFF position. 2. Turn ofi any additional Powerwalls by setting the On/Ofi switch to the OFF position. 3. Turn ofi the AC breaker to Powerwall+ and any additional Powerwall AC breaker(s). 4. Wait for at least one minute. 5. Turn the AC breaker(s) back on. 6. Turn on Powerwall+ and any additional Powerwalls. APPENDIX G: INSTALLATION TROUBLESHOOTING 91Powerwall+ Installation Manual APPENDIX H: SAFETY FEATURES Arc Fault Detection and Protection The Arc-Fault Circuit Interrupter (AFCI) mechanism is compliant with NEC code section 690.11, UL1699B and UL1998 standards. Arc fault detection is performed to detect series arcs within the PV array. The detection algorithms work based on both voltage and current. When an arc fault is detected, Powerwall + stops converting power and disconnects from the grid. Once a fault has been detected, it can only be reset manually on-site using the mobile app via remote command. The reset cannot be automatically cleared. The fault is displayed with an LED visual indicator, which cannot be reset automatically. To activate the AFCI self-test feature, power cycle the unit. Ground Fault Protection Powerwall+ is capable of detecting ground faults in compliance with UL 1741. Protective Earth Impedance Check The protective earth (PE) connection is checked for sufficiently low impedance at least once per day. The scheduled time for the PE impedance test is every morning before closing the inverter side AC relays. Upon detected loss of PE or identiffcation of a high impedance value Powerwall+ does not connect to the grid until the fault is cleared manually or a repeated PE impedance test demonstrates a sufficiently low impedance. 92Powerwall+ Installation Manual System LED Behavior Powerwall+ LED Behavior LED State Indication On (solid)Powerwall+ idle, no faults On (fading)Powerwall+ enabled and charging or discharging OR generating solar energy On (flashing slowly)Powerwall+ faulted at < 30 V solar (safe) On (flashing rapidly)Abnormal fault present Ofi Powerwall+ not enabled or switched ofi Backup Switch LED Behavior The Backup Switch LED is located near the Reset button under the conduit hub. To view the Backup Switch LED and determine its status, remove the conduit hub. LED State Indication On (solid)Power is on, communication established with Powerwall+ On (flashing)Power is on, no communication with Powerwall+ Ofi Power is ofi APPENDIX H: SAFETY FEATURES 93Powerwall+ Installation Manual Neurio Meter LED Behavior Figure 34. Neurio W2 Remote Meter LED LED Status Behavior Red Solid Powered Blue Solid Wi-Fi Connected Purple Solid Normal Operation Blue Slow Flashing (2s/2s)Wi-Fi Network Lost Blue Fast Flashing (0.5s/0.5s)Attempting to Join Wi-Fi Network Green Solid Conffguration Network Up Purple Blinking Conffguration Data Transfer Yellow Solid Firmware Upgrade in Progress Pairing Behavior How long can a Neurio meter remain powered on to accept pairing requests? If the meter has never been paired, or if it was previously paired and then unpaired gracefully via the Conffguration Interface, the meter will remain on and accept pairing requests indeffnitely. It will reboot every 30 minutes. If the meter has been previously paired and was not unpaired gracefully via the Conffguration Interface, the pairing process must begin within 1 minute of bootup (audible chime). APPENDIX H: SAFETY FEATURES 94Powerwall+ Installation Manual APPENDIX I: MULTI-POWERWALL+ INSTALLATIONS Powerwall+ systems can be installed with additional Powerwall+ units and/or Powerwall 2 AC units. Multi-Powerwall+ Systems Installation Overview For systems with multiple Powerwall+ units, one Powerwall+ is designated as the leader and any additional units are designated as followers. The leader Powerwall+ is connected to the Backup Switch (and to the additional Powerwall 2 AC unit(s) as described in the following section) via 12V/CAN wiring. Each follower unit is installed as it would be in a single Powerwall+ installation with the exception of 12V/CAN wiring, as it communicates wirelessly with the leader and does not require a 12V/CAN connection to the leader and/or the Backup Switch. Maximum Distance Between Components Distance to Measure Maximum Distance Distance between the leader Powerwall+ and each follower Powerwall+ 6 ft (2 m), must be within line of sight, no obstructions Total distance between the Backup Switch and the last Powerwall / Powerwall+ unit in the chain See Plan Distance Between Components on page 20 Multi-Powerwall+ System Conffguration The conffguration process for a multi-Powerwall+ system is unique, as each follower unit must be conffgured as such. For multi-Powerwall+ conffguration instructions, see the Powerwall+ Configuration Guide on Partner Portal. 95Powerwall+ Installation Manual Powerwall+ Systems with Powerwall 2 AC For Powerwall+ systems with additional Powerwall 2 AC units, the units can be installed side by side, or in a stacked conffguration (see Stacked Installations on page 101). The Powerwall 2 AC units are then connected to a Powerwall+ unit via a CAN connection. Side by Side Installations When installing Powerwall+ with additional Powerwall 2 units mounted side by side, install each system component as it would be installed in a single Powerwall+ system. NOTE: While the Backup Switch is connected directly to the Powerwall+ in a single Powerwall+ system, the following instructions connect the Backup Switch to the Powerwall 2 AC via 12V/CAN wiring, then connect the Powerwall 2 AC to the Powerwall+. This allows for a cleaner wiring conffguration where the system still functions as intended, but is easier to install and requires less wiring material. To wire the system: Connect Backup Switch to Powerwall 2 1. Run 4-conductor communication cable from Backup Switch to Powerwall 2. 2. Wire the 4-conductor communication cable to the Backup Switch connector (see Connect Powerwall+ to the Backup Switch on page 47 for complete instructions). 3. At the Powerwall 2: a. Strip the communication wire jacket about 3 inches and strip each conductor 0.4 inches (10 mm), then insert the conductors into the black 4-pin connector provided with Powerwall. NOTE: Cut back the drain wire. The drain wire should be terminated at the Powerwall+ solar assembly ground terminal only. b. Plug the 4-pin connector into the bottom 4-pin terminal (labeled “IN”) in the Powerwall wiring compartment. APPENDIX I: MULTI-POWERWALL+ INSTALLATIONS 96Powerwall+ Installation Manual Connect Powerwall 2 to Powerwall+ NOTE: In a Powerwall+ system with additional Powerwall 2 units mounted side by side, there is no need to enter the Powerwall+ battery assembly wiring compartment. The communication cable can be routed from the Backup Switch to each Powerwall 2, and then to the Powerwall+ solar assembly. 1. Run 4-conductor communication cable from Powerwall 2 to Powerwall+. 2. At the Powerwall 2: a. Remove and discard the terminating resistor from the green 4-pin connector provided with Powerwall. NOTE: The terminating resistor installed in the Powerwall+ battery assembly wiring compartment serves as the terminating resistor for the system. b. Strip the communication wire jacket about 3 inches and strip each conductor 0.4 inches (10 mm), then insert the conductors into the green 4-pin connector. NOTE: Cut back the drain wire. The drain wire should be terminated at the Powerwall+ solar assembly ground terminal only. c. Plug the 4-pin connector into the top 4-pin terminal (labeled “OUT”) in the Powerwall wiring compartment. 3. Wire the 4-conductor communication cable to the Powerwall+ solar assembly (see Connect Powerwall + to the Backup Switch on page 47 for complete instructions). Figure 35. System Layout for Powerwall+ with Powerwall 2 APPENDIX I: MULTI-POWERWALL+ INSTALLATIONS 97Powerwall+ Installation Manual Figure 36. 12V/CAN Wiring for Powerwall+ with Powerwall 2 NOTE: The follower Powerwall+ unit is not shown here because it is not connected to any other component via 12V/CAN. APPENDIX I: MULTI-POWERWALL+ INSTALLATIONS 98Powerwall+ Installation Manual Figure 37. System Layout for Two Powerwall+ Units with Two Powerwall 2 Units Figure 38. 12V/CAN Wiring for Powerwall+ with Two Powerwall 2 Units NOTE: The follower Powerwall+ unit is not shown here because it is not connected to any other component via 12V/CAN. APPENDIX I: MULTI-POWERWALL+ INSTALLATIONS 99Powerwall+ Installation Manual Make AC Power Connections 1. Connect each Powerwall+ and Powerwall to the main or sub electrical panel of the installation (depending on the system conffguration) according to the electrical service type. Each Powerwall connection to the main electrical panel requires an independent 30 A circuit breaker, while each Powerwall+ requires an independent 50 A circuit breaker. This breaker serves as the disconnect for the unit, and must be wired in accordance with local wiring codes and regulations. 2. For each Powerwall 2: a. On the Powerwall side, strip the ends of the wires and attach them to the corresponding leads on the 3-pin AC power harness. b. Plug the AC power harness into the AC connector in the Powerwall wiring compartment. Ensure that the connector clicks into place. 3. Connect the AC conductors to the Powerwall+ AC wiring terminals in the solar assembly (see STEP 6: Make AC Power Connections on page 50 for complete instructions). APPENDIX I: MULTI-POWERWALL+ INSTALLATIONS 100Powerwall+ Installation Manual Stacked Installations In the Powerwall Stack Kit Powerwall Stack Kit: Tesla P/N 1112154-00-x 1. (2) Side clips 2. (1) Top cover 3. (1) Conduit nipple 4. (2) Conduit insulation bushings 5. (2) Conduit sealing O-rings 6. (1) Bridge piece 7. (1) 6 mm Allen wrench 8. (1) Drill guide (two pieces) 9. (1) 5-conductor communication cable 10. (1) Wiring interface cover 11. (4) Magnetic camshaft caps Required Tools • Personal protective equipment (safety glasses, gloves, protective footwear) • Drill and 6 mm (1/4-inch) drill bit (for drilling pilot hole in Powerwall chassis) • 35 mm (1-3/8 inch) hole saw (for drilling conduit hole in Powerwall chassis) • Small metal ffle (for removing burrs from Powerwall chassis sheet metal) • Rubber mallet or small hammer and wood block (for seating side clips in Powerwall) APPENDIX I: MULTI-POWERWALL+ INSTALLATIONS 101Powerwall+ Installation Manual • Wire strippers/cutters for 24 to 8 AWG (1.5 to 8 mm2) wires • Large (5 mm) flathead driver bit (for Powerwall Earth terminal) • Small grease applicator (wooden craft stick or cotton swab) • Water-resistant heavy-duty grease (Dow Corning Molykote BR-2 Plus High Performance Grease or equivalent, for preventing corrosion on side clips) • Installation tools (level, tape measure, pencil, flashlight) Site Requirements Stacked Powerwall+ and Powerwall systems must be floor-mounted and must be anchored to an adjacent wall. The wall must be capable of supporting the lateral load of the stack. A maximum number of 1 floor-mounted Powerwall+ and 2 floor-mounted Powerwall units may be joined together with two Powerwall Stack Kits. For systems with more than 3 units, separate groups of 3 units should be assembled, with each group of 3 attached to a wall. For complete Powerwall+ Mechanical Speciffcations and Site Requirements, see Powerwall+ with Backup Switch Installation Requirements on page 11. Figure 39. Dimensions for 2-unit and 3-unit Stacks APPENDIX I: MULTI-POWERWALL+ INSTALLATIONS 102Powerwall+ Installation Manual Installation Instructions These instructions assume that at least one Powerwall+ has been installed and additional Powerwall units are being installed using the Powerwall 2 Stack Kit (Tesla P/N 1112154-00-x). See STEP 1: Plan the Installation Site on page 20 for complete installation instructions. Step 1: Prepare for Installation 1. Turn ofi the ffrst (previously installed) Powerwall+ by setting its Enable switch to the OFF position. 2. Turn ofi the AC circuit breaker for the Powerwall+. 3. Ensure that the second Powerwall is turned ofi by verifying that its On/Ofi switch is set to the OFF position. APPENDIX I: MULTI-POWERWALL+ INSTALLATIONS 103Powerwall+ Installation Manual 4. Remove both side covers from each Powerwall to be joined. NOTE: On the ffrst (previously installed) Powerwall+, it may be necessary to remove the small plastic insert at the bottom of the covers to help with removal. For the right (LED) side covers, do not disconnect the switch and LED leads. Turn the cover to one side and rest it against the Powerwall+ chassis. 5. Using a T20 Torx bit, remove the wiring compartment covers from the previously installed Powerwall+. NOTE: Do not disconnect the Rapid Shutdown wiring harness that is routed through the Powerwall+ wiring compartment cover. If this harness is disconnected, the Enable switch will not function and the system will not operate. APPENDIX I: MULTI-POWERWALL+ INSTALLATIONS 104Powerwall+ Installation Manual Step 2: Choose a Wiring Option In stacked Powerwall+ and Powerwall 2 AC systems, communication wiring is daisy-chained between Powerwall+ and Powerwall units. Power wiring is direct (home run) from each Powerwall+ or Powerwall to a dedicated circuit breaker in the electrical panel. Wiring between Powerwall+ and additional Powerwalls can be concealed, or run externally. Concealed Wiring For concealed wiring, a hole is drilled from the front of Powerwall+ into its wiring compartment and wires are run directly into it from the back port of the Powerwall. To use this wiring method, proceed to Step 3, “Prepare for Concealed Wiring.” External Wiring For external wiring, wires are run through conduit or raceway that spans the wiring compartment ports on the side of each Powerwall+ or Powerwall. To use this wiring method, skip to Step 4, “Join the Units.” Step 3: Prepare for Concealed Wiring 1. Disconnect all wiring from the wiring compartment of Powerwall+. 2. Locate the wiring interface cover and peel back the fflm to expose the adhesive on the cover gasket. With the gasket facing inward, place the cover over the interface board at the back of the wiring compartment. The cover is intended to protect the circuit board and its components from metal shavings while drilling into the wiring compartment. APPENDIX I: MULTI-POWERWALL+ INSTALLATIONS 105Powerwall+ Installation Manual 3. Attach the included drill guide to the front of Powerwall+ by bracing the inside half of the guide against the bottom of its wiring compartment. 4. Clip the outside half of the drill guide to the inside half so that the guide engages the hem of the Powerwall+ enclosure. 5. While holding the drill guide to make sure it conforms to the edge of the Powerwall+ chassis, drill a 1/4-inch (6 mm) pilot hole using the small hole in the drill guide. 6. Remove the drill guide. APPENDIX I: MULTI-POWERWALL+ INSTALLATIONS 106Powerwall+ Installation Manual 7. Drill the full-size 1-3/8 in (35 mm) hole with a hole saw, using the pilot hole as a guide. 8. File the edges of the hole to remove any burrs. 9. Clear the wiring compartment of all metal shavings and debris. 10. Remove the protective cover from the wiring compartment. 11. If Powerwall+ still has its protective fflm, remove the fflm. 12. Peel back the protective fflm from the feet of the Powerwall before moving it into place. 13. Remove the plug from the back cable entry port of the Powerwall and place it in the side cable entry port. Step 4: Join the Units 1. Orient the Powerwall about 1 in (2 cm) in front of the Powerwall+, with its back cable entry port facing the hole you drilled in the Powerwall+. 2. (Concealed wiring installations only) Do the following to bridge the gap between the Powerwall+ and Powerwall wiring compartments: a. Locate the bridge piece, conduit nipple, two O-rings, and two insulation bushings. APPENDIX I: MULTI-POWERWALL+ INSTALLATIONS 107Powerwall+ Installation Manual b. Assemble the conduit nipple, bridge piece and O-rings. Center the bridge and O-rings on the nipple. NOTE: Orient the O-rings so that the sides with greater surface area (marked “Box Side”) point to the outside, toward the Powerwall+ and Powerwall chassis. c. Install the assembly between the Powerwall+ and Powerwall units so it spans the two wiring compartments. d. Thread an insulation bushing onto each end of the conduit nipple, but do not fully tighten the bushings. APPENDIX I: MULTI-POWERWALL+ INSTALLATIONS 108Powerwall+ Installation Manual 3. (All installations) Locate a side clip, making sure the flange (with magnet) is positioned at the top and that the cams are rotated vertically in relation to the clip. 4. Slide the side clip into the gap between the Powerwall+ and Powerwall so that its flanges engage the side hem of each enclosure. APPENDIX I: MULTI-POWERWALL+ INSTALLATIONS 109Powerwall+ Installation Manual NOTE: The enclosure hems have cutouts that mate with tabs in the clip. 5. Press the clip until it is flush with the sides of the units. 6. Using the provided 6 mm Allen hex wrench, do the following: a. Turn the top cam 90 degrees clockwise until it clicks into place and stops rotating. APPENDIX I: MULTI-POWERWALL+ INSTALLATIONS 110Powerwall+ Installation Manual b. Turn the bottom cam toward the wall (toward Powerwall+) so that the cam indicator notch on the hex camshaft head points toward the wall, until the cam clicks into place. NOTE: The top cam is symmetrical and can be rotated in either direction to secure the side clip. The bottom cam must be rotated toward Powerwall+ so that its stepped side (indicated by the notch on the hex camshaft head) engages the housing of one of the units. 7. Repeat steps 3-6 to install a side clip on the other side of the units. NOTE: If necessary, use a small rubber mallet or a hammer and wood block to gently tap the side clips so that they are fully seated in the hem of the unit. APPENDIX I: MULTI-POWERWALL+ INSTALLATIONS 111Powerwall+ Installation Manual 8. Position the top cover across the gap between Powerwall+ and Powerwall so that its flanges engage the tops of each side clip. The cover is held in place by the magnets on the tops of the side clips. 9. (Concealed wiring installations only) Tighten the insulation bushing on each side of the conduit nipple to secure the bridge between the two wiring compartments. APPENDIX I: MULTI-POWERWALL+ INSTALLATIONS 112Powerwall+ Installation Manual 10. Use shims to ensure the Powerwall is level. NOTE: When joined, the units should be level within +/– 2 degrees side-to-side and within +/– 5 degrees front-to-back. APPENDIX I: MULTI-POWERWALL+ INSTALLATIONS 113Powerwall+ Installation Manual Step 5: Wire the Powerwall Units Connect the communication ports of the Powerwall+ and Powerwall: 1. At the Powerwall+, remove and discard the green female connector with the terminating resistor. Plug the remaining green male connector into the Powerwall IN terminal. NOTE: There is never any need to change the factory-installed wiring to the Powerwall+ IN / OUT terminals. Powerwall+ can be connected to Powerwall 2 using the green 4-pin connector that is connected to the factory-installed wiring. 2. To ground the drain wire: a. Strip the end of the equipment grounding conductor and wrap the communication drain wire around the grounding conductor lead. b. Insert the drain wire and grounding conductor lead into the Powerwall chassis ground lug. The ground lug is identiffed with the following symbol: c. Tighten the screw in the ground lug to 4.5 Nm (40 lb-in). NOTE: There will be a drain wire grounded in each pair of units in the chain. For each pair of components (Powerwall+ and ffrst Powerwall, ffrst Powerwall and second Powerwall, etc.), the drain wire is cut at the ffrst component and grounded at the second. 3. In the last Powerwall in the communication chain, plug the 4-pin connector with the terminating 120- Ohm resistor into the top 4-pin terminal (labeled “OUT”). Figure 40. Communication Wiring for Stacked Units NOTE: If additional communication wire length is needed, the terminating resistor can be removed from the green female connector in the Powerwall+ battery assembly and discarded. 4-conductor communication cable can then be run from the green female connector to the 4- pin connector provided with Powerwall 2. The 4-pin connector can then be plugged into the Powerwall 2 IN terminal. APPENDIX I: MULTI-POWERWALL+ INSTALLATIONS 114Powerwall+ Installation Manual Figure 41. Extended Communication Wiring for Stacked Units Figure 42. System Layout for Powerwall+ Stacked with Two Powerwall 2 Units APPENDIX I: MULTI-POWERWALL+ INSTALLATIONS 115Powerwall+ Installation Manual Figure 43. CAN Wiring for Powerwall+ with Two Powerwall 2 Units NOTE: The follower Powerwall+ unit is not shown here because it is not connected to any other component via 12V/CAN. NOTE: The 12V/CAN Wiring between the two Powerwall 2 units is the same as in a regular Powerwall 2 stacked installation. 4. Connect each AC Powerwall to the main or sub electrical panel of the installation (depending on the system conffguration) according to the electrical service type. Each Powerwall connection to the main electrical panel requires an independent 30 A circuit breaker, while each Powerwall+ requires an independent 50 A circuit breaker. This breaker serves as the disconnect for the unit, and must be wired in accordance with local wiring codes and regulations. 5. On the Powerwall side, strip the ends of the wires and attach them to the corresponding leads on the 3-pin AC power harness. 6. Plug the AC power harness into the AC connector in the Powerwall wiring compartment. Ensure that the connector clicks into place. 7. Reconnect the power and communications leads that were disconnected from Powerwall+ at the beginning of the installation. Step 6: Close the Wiring Compartments and Replace the Covers 1. Arrange the communication and AC power wires inside the Powerwall+ and Powerwall wiring compartments. 2. Ensure that all conduit junctions and cable entry points are secure and properly sealed. APPENDIX I: MULTI-POWERWALL+ INSTALLATIONS 116Powerwall+ Installation Manual 3. Replace the wiring compartment cover on Powerwall+ and each Powerwall. Ensure that the cover seats properly on the gasket so that the compartment is sealed. Tighten the fasteners using a Torx T20 bit. Torque to 1.5 Nm. NOTE: Ensure the Rapid Shutdown wiring harness that is routed through the Powerwall+ wiring compartment cover is not disconnected. If this harness is disconnected, the Enable switch will not function and the system will not operate. 4. Replace each of the side covers on the each unit by pushing the top into place and working toward the bottom to reattach it to the clips along the length of the unit. 5. (Optional) In humid or rainy climates, or in locations where the installation may be exposed to salt, fog, or other corrosive elements use a small applicator (such as a wooden craft stick or cotton swab) to apply a generous bead of heavy duty water-resistant grease around the outside edge of each camshaft head where it contacts the side clip. APPENDIX I: MULTI-POWERWALL+ INSTALLATIONS 117Powerwall+ Installation Manual 6. Place a magnetic camshaft cap on each of the four hex camshaft heads Step 7: Turn On and Conffgure the System 1. Switch on the AC circuit breakers for Powerwall+ and each Powerwall. 2. Switch on each Powerwall+ and Powerwall by moving the Enable switch on the right (LED) side of the unit to the ON position. When Powerwall+ and each Powerwall are enabled and communicating with the Backup Switch, the LED on the right side of Powerwall illuminates. 3. See Configure the System on page 60 for instructions on updating system ffrmware and conffguring the system. NOTE: During conffguration, ensure that when scanning for Powerwall+ and Powerwalls, the Conffguration Interface shows all units in the system. 4. After installation is complete, remove the protective fflm from the Powerwall. APPENDIX I: MULTI-POWERWALL+ INSTALLATIONS 118Powerwall+ Installation Manual APPENDIX J: SERVICING POWERWALL+ WARNING: These servicing instructions are for use by qualiffed personnel only. To reduce the risk of electric shock, do not perform any servicing other than that speciffed in the operating instructions unless you are qualiffed to do so. Performing a Backup Switch Manual Override During normal operation, the system automatically senses grid outages and transitions to ofi-grid operation. If the grid outage ends and the system is unable to transition back to on-grid operation and is dropping loads, perform a manual override to bring the system back to on-grid operation: 1. Use a Phillips PH2 screwdriver to loosen the (3X) captive fasteners holding the conduit hub in place and remove the conduit hub. 2. Push the Backup Switch Manual Override switch in to perform a manual override. CAUTION: Use the Manual Override only during service events. The system may override a user- prompted manual override action for safety reasons. If the manual override is not successful, contact Tesla Service before taking any additional steps. Backup Switch Manual Override Switch Positions Disconnect from Grid Connect to Grid To manually disconnect the system from the grid, pull the Backup Switch manual override switch out. To manually connect the system to the grid, push the Backup Switch manual override switch in. 119Powerwall+ Installation Manual Servicing the Solar Assembly WARNING: These servicing instructions are for use by qualiffed personnel only. To reduce the risk of electric shock, do not perform any servicing other than that speciffed in the operating instructions unless you are qualiffed to do so. WARNING: Live voltage may be present on the inverter terminals even when there is no power source from the PV modules. To ensure the DC bus is not powered, always turn the AC breaker OFF to disconnect the solar assembly from the grid before performing any service work. This will activate Rapid Shutdown. In the solar assembly, Rapid Shutdown is initiated by opening any AC breaker that interrupts the AC electric supply to the inverter. Upon loss of AC power, the solar assembly will stop power conversion and initiate Rapid Shutdown (all MCIs will open and DC voltages will drop to safe levels). Once the solar assembly is in this state, it is safe to perform service. To service the solar assembly: 1. Open the Powerwall+ AC circuit breaker and secure it against reconnection. ◦ This will initiate Rapid Shutdown and bring the DC voltage to a safe level. 2. Using a Phillips head screwdriver, loosen the captive screw on the solar assembly door and open the door. 3. Remove the DC isolator connector: a. Push the plastic lever to release the DC isolator connector. b. Remove the DC isolator connector. Figure 44. DC Isolator in Wiring Compartment WARNING: The DC isolator is not load breaking. Ensure AC power is disconnected before unplugging this connector. APPENDIX J: SERVICING POWERWALL+ 120Powerwall+ Installation Manual NOTE: The connector inside the unit that serves as the DC isolator is deffned as a Disconnecting Means for Isolating PV Equipment in compliance with NEC sec. 690.15. 4. Wait 5 minutes before proceeding. WARNING: Risk of electric shock from stored energy. Wait 5 minutes after disconnecting all sources of supply before proceeding. 5. Using a suitable measuring device: a. Place the test probe in each rectangular opening in the DC-in terminal blocks to ensure there is no voltage present. b. Place the test probe in each rectangular opening in the equipment grounding conductor block to ensure there is no voltage present. c. Place the test probe in each rectangular opening in the AC-out terminal block to ensure there is no voltage present. NOTE: See Appendix B: Wiring Reference on page 70 for a labeled diagram of all terminal blocks. 6. Using a 2.5 mm (3/32 in) slotted screwdriver: a. Open the jaws of each opening in the DC-in terminal blocks and unplug each wire from the blocks. b. Open the jaws of each opening in the AC-out terminal blocks and unplug each wire from the block. c. Open the jaws of each opening in the ground conductor terminal blocks and unplug each wire from the block. 7. If performing any work away from the solar assembly enclosure, close the solar assembly door and lock and tag it out using the lock hasps on the enclosure door. NOTE: Before closing the solar assembly door, clean out the enclosure and vacuum out any dust. APPENDIX J: SERVICING POWERWALL+ 121Powerwall+ Installation Manual APPENDIX K: REVISION LOG Revision Date Description 1.0 2021-04-20 Initial release 1.1 2021-05-16 • Updated Backup Switch installation sequence • Added System Metering appendix 1.2 2021-06-01 • Updated multi-Powerwall+ wiring instructions • Corrected minimum fastener size in Mounting Bracket Anchoring Details 1.3 2021-06-04 • Added UL 1741 PCS requirements 122Powerwall+ Installation Manual Published June 2021 Revision 1.3