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HomeMy WebLinkAboutGENERATOR1 /lr � C�/�. 2 k W INCLUDES: ® True Power"' Electrical Technology ® Two Line LCD Multilingual Digital Evolution"" Controller (English/Spanish/ French/Portuguese) ® Two Transfer Switch Options Available: 100 Amp, 16 Circuit Switch or 200 Amp Service Rated Smart Switch. See Page 4 for Details. • Electronic Governor i wENERACo SCANNED StLul eftnty GUARDSANO SERIES Residential Standby Generators Air -Cooled Gas Engine e System Status & Maintenance Interval LED Indicators Sound Attenuated Enclosure ® Flexible Fuel Line Connector 0 Direct -To -Dirt Composite Mounting Pad ® Natural Gas or LP Gas Operation A 5 Year Limited Warranty • Capability to be installed within 18" (457 mm) of a building* FEATURES Standby Power Rating Models G007036-0, G007037-0 (Aluminum - Bisque) -16 kW 60 Hz Model G007035-0 (Aluminum - Bisque) -16 kW 60 Hz Models G007039-0, G007038-0 (Aluminum - Bisque) - 20 kW 60 Hz Models G007043-1, G007042-1 (Aluminum - Bisque) - 22 kW 60 Hz O INNOVATIVE ENGINE DESIGN & RIGOROUS TESTING are at the heart of Generac's success in providing the most reliable generators possible. Generac's G-Force engine lineup offers added peace of mind and reliability for when you need it the most. The G-Force series engines are purpose built and designed to handle the rigors of extended run times in high temperatures and extreme operating conditions. O TRUE POWER- ELECTRICAL TECI4NOLOGY: Superior harmonics and sine wave form produce less than 5%Total Harmonic Distortion for utility quality power. This allows confident operation of sensitive electronic equipment and micro -chip based appliances, such as variable speed HVAC systems. O TEST CRITERIA: J PROTOTYPE TESTED J NEMA MGi-22 EVALUATION J SYSTEM TORSIONAL TESTED J MOTOR STARTING ABILITY j ENERAC' `=I ;;G �L us QUI " LISTED Note: CUL certification only applies to unbundled units and units packaged with limited circuit switches. Units packaged with the Smart Switch are UL certified In the USA only. *Only if located away from doors, windows and fresh air intakes, and unless otherwise directed by local codes. O SOLID-STATE, FREQUENCY COMPENSATED VOLTAGE REGULATION: This state-of-the-art power maximizing regulation system is standard on all Generac models. It provides optimized FAST RESPONSE to changing load conditions and MAXIMUM MOTOR STARTING CAPABILITY by electronically torque -matching the surge loads to the engine. Digital voltage regulation at ±1 %. O SINGLE SOURCE SERVICE RESPONSE from Generac's extensive dealer network provides parts and service know-how for the entire unit, from the engine to the smallest electronic component. O GENERAC TRANSFER SWITCHES: Long life and reliability are synonymous with GENERAC POWER SYSTEMS. One reason for this confidence is that the GENERAC product line includes its own transfer systems and controls for total system compatibility. w GENERAC tiat'e3ss ,�°L,,,� �jPROMISE GsrPQ*��RRA6` * �_(r� . f •Built in the USA using domeeflcPad fine/ge pads. GENERAC® 16/20/22 kW features and benefits Engine - • Generac G-Force design Maximizes engine "breathing" for increased fuel efficiency. Plateau honed cylinder walls and plasma moly rings helps the engine run cooler, reducing oil consumption resulting in longer engine life. • "Spiny-lok" cast iron cylinder walls Rigid construction and added durability provide long engine life. • Electronic ignition/spark advance These features combine to assure smooth, quick starting every time. • Full pressure lubrication system Pressurized lubrication to all vital bearings means better performance, less maintenance and longer engine life. Now featur- ing up to a 2 year/200 hour oil change interval. • Low oil pressure shutdown system Shutdown protection prevents catastrophic engine damage due to low oil. • High temperature shutdown Prevents damage due to overheating. Generator • Revolving field Allows for a smaller, light weight unit that operates 25% more efficiently than a revolving armature generator. • Skewed stator Produces a smooth output waveform for compatibility with electronic equipment. • Displaced phase excitation Maximizes motor starting capability. • Automatic voltage regulation Regulates the output voltage to ±1 % prevents damaging voltage spikes. • UL 2200 listed For your safety. Transfer Switch (if applicable) , • Fully automatic Transfers your vital electrical loads to the energized source of power. • NEMA 3R Can be installed inside or outside for maximum flexibility. • Remote mounting Mounts near your existing distribution panel for simple, low-cost installation. Evolution'' Controls • Auto/Manual/Off Illuminated buttons Selects the operating mode and provides easy, at -a -glance status indication in any condition. • Two-line LCD multilingual display Provides homeowners easily visible logs of history, maintenance and events up to 50 occurrences. • Sealed, raised buttons Smooth, weather -resistant user interface for programming and operations. • Utility voltage sensing Constantly monitors utility voltage, setpoints 65% dropout, 80% pick-up, of standard voltage. • Generator voltage sensing Constantly monitors generator voltage to ensure the cleanest power delivered to the home. • Utility interrupt delay Prevents nuisance start-ups of the engine, adjustable 2-1500 seconds from the factory default setting of 5 seconds by a qualified dealer. • Engine warm-up Ensures engine is ready to assume the load, setpoint approximately 5 seconds. • Engine cool -down Allows engine to cool prior to shutdown, setpoint approximately 1 minute. • Programmable exercise Operates engine to prevent oil seal drying and damage between power outages by running the generator for 5 minutes every other week. !Also offers a selectable setting for weekly or monthly operation providing flexibility and potentially lower fuel costs to the owner. • Smart battery charger Delivers charge to the battery only when needed at varying rates depending on outdoor air temperature. Compatible with lead acid and AGM -style batteries. • Main line circuit breaker Protects generator from overload. • Electronic governor Maintains constant 60 Hz frequency. i Unit • SAE weather protective enclosure Sound attenuated enclosures ensure quiet operation and protection against mother nature, withstanding winds up to 150 mph. Hinged key locking roof panel for security. Lift -out front for easy access to all routine maintenance items. Electrostat- ically applied textured epoxy paint for added durability. • Enclosed critical grade muffler Quiet, critical!grade muffler is mounted inside the unit to prevent injuries. • Small, compact, attractive Makes for an easy, eye appealing installation, as close as 18" away from a building. Installation System • 1 ft (305 mm) flexible fuel line connector Absorbs any generator vibration when connected to rigid pipe. ® Direct -to -dirt composite mounting pad Complex lattice design prevents settling or sinking of the generator system. 0 Integral sediment trap Prevents particles and moisture from entering the fuel regulator and engine, prolonging engine life. 16/20/22 M specifications Generalor G007035-0, G007036.0, G007038-0, G007039-0 G007042-1, B007043-1 Model G007037 0 (16 kW) (20 I(W) (22 kW) Rated Maximum HERR Capacty (LP) 1_ 16 000 Watts 20,000 Walts; 22,000 . Rated Maximum Continuous Power Capacity (NG) 16,000 Watts' 18,000 Watts' 19,500 - —_240 _._,.. .__.. •.240 ` - ...._ 240, = Rated Maximum Continuous Load Current 240 Volts (LP/NG) — 66.6/66 6 83 3%/5 916/813 ' .. f Total larmotic Distortion •• ., r .: T a ....•... Less than5°� Less than-5� • •. Less than 5 �o r Main Line Circuit Breaker 70 Amp 100 Amp 100 Amp Number of Rotor Poles — 2 2 2 Rated. FCA requency' ' 60 Hz w 76Mi Power Factor 1.0 1 0 1.0 Battery.Regin(emenj(oct Volts Groupfi26540;CCA 12,Minimum or. Gratip.35AGM 650 CCA Mmlmum _ Unit Weight (Ib/kg) 406/186 448/203 466/211 rDfinensions(LkWxH)fNmm - 1— 48x251229/1218z638x732 Sound output in dB(A) at 23 ft (7 m) with generator operating at normal load' ` ;— ~ 66 66 67 Souotl outpuYin dB(A) at 23 ft (7 m) with generatdi in QuieVT¢stl• low=speetl exercise mode" Exercise duration 5 min 5 min 5 min Engine Type of Engine GENERAC G-Force 1000 Series .. .. _ . NbmGef bl Cylinders : , • ,_ . r � , r. - . - _ ..2 - . -- - - - - -•- -�2 `,--- ---- 2 -• --- _.. Displacement _ CylinderBlock 999 ce _Y 999 ee 999 ec Alurtlinum w/ Cast lydri Sleeve -•" Valve Arrangement �l _ Overhead Valve Overhead Valve Overhead Valve IgnitionSy"stem, : _'.-. So)id-sstatew. agneto.._:_1:,Sblid-state;w%Magneto:• Solitl-state.w/Magneto Governor System Electronic Electronic Electronic Corn (esSiori Ratio:. — 9.5;1 9:5:1 ' 9.5:-- Starter 12 Vdc 12 Vdc 12 Vdc OU.Capacity Including Filter _.._f___. __._ . _ _ , -_. __.,- _ ._ ._. _.... Approx:,1:,9:gt/1,8 L"_ e _Approx`-1.kgY.1.8-L .._ _- APProx: l:9 gt/1.S L_ Operating rpm 3,600 3,600 3 600 ---_ - ...----.._ . _ Fuel Canslimption - - _ : _-.— -_ ' ''„ ; Natural Gas fta/ki (ma/hrj 112 Laid", (6,77)204 (5 78)`' �} 228 ! FuII Load:.- : - 308 (8,75) ,.; . _" . 301-(8.52). • 327 (9.26) Liquid Propane, . 03/hr (gai/hr) [Uhr]7. 112 Load 91 6 (2 52) [9 53] : '• `86 (2 37) [8 99]. 92 (2.53) [9.57] FuII Load .. . ` 106.8`(2'94)`[11t11]'�. 129�6 (3 56j [13 48] T ^ 142`(3.80) [14.77]''_ _ Note: Fuel pipe must be sized for full load. Required fuel pressure to generator fuel inlet at all load ranges-3.5-71 water column (7-13 mm mercury) for natural gas,10-121 water column (19-22 mm mercury) for LP gas. For Btu content, multiply fl3/hrx 2500 (LP) or ftaAr x 1000 (NG). For Megajoule content, multiply ma/hr x 93.15 (LP) or ma/hr x 37.26 (NG) Controls 2-Line Plain Text Multilingual LCO Display Simple user Interface for ease of operation. Mode Buttons Auto Ai iemalIG Start on Utility failure 7 day exerciser: Manual Start with starter control, unit stays on. If utility falls, transfer to load takes place. Oft _ Stops uniL•Power is.removed;•Contrwl and charRer still operate_ Ready to RuNMafntenance Messages Standard En me Run�Hours ]ndIcaboe _ ... _, .._-. _ 9 . - _ �_ ; Standa c, r Programmable start delay between 2-1500 seconds Standard (programmable by dealer only) '�`--"� `" :Ufllty:ValtageLoss/Returnlp(JhlilyAdjustdble"(BrpwpootSetting) ,_��:.._y;�;)_ ,_ _ From 140-171 V/190-216 V - _____. __ _,.__: Future Set Capable Exerciser/Exercise Set Error Warning Standard R' •uNAlarm atntence Cogsr:5D Events Ezcti Engine Start Sequence Cyclic cranking: 16 sec on, 7 rest (90 sec maximum duration). rter Lock out i , Starter cannot re en age untfl.5 sec after engine has sto ped__ Smart Battery Charger Standard !Charger FaulVMrsSing AC Warning 1 Y :- dard Low Battery/Battery Problem_ Protection and Battery Condition Indicatjon Standard _ AUlomahc Voltage Regulation with Overand Under.Vollage Praledbon Standard . '' . Under-Frequency/Overload/Stepper Overcurrenl Protection Standard -Standard :Safety Fused/Fuse Problem Prbtectidn —..--._- -' Automatic Low Oil Pressure/Hfgh Oil Temperature Shutdown Standard 0vercrank/Oyerspeed (@ 72'Hz /rpm Sense Lass Shutdown Standard ' High Engine Temperature Shutdown Standard internal:FaglVlnco"rreiit'WiringPrdtebtidn ' •. • ;: ; -. Standardy4 _`_ ..-��_�_,___.._._—____ Co mmon External Fault Capability Field lJpgradable Firmware Standard ` " —Sound levels are taken from the front of the generator. Sound levels taken from olhersides of the generator maybe higher depending on installation parameters. Rating definitions -Standby. Applicable for supplying emergency power for the duration of the utility power outage. No overload capability is available for this rating. (All ratings in accordance wilh BS5514• IS03046 and DIN5271). ' Maximum kilovolt amps and dunent are subject to and limited by such factors as fuel 1110megajoule content, ambient temperature, attitude, engine powerand condition, etc. Maximum power decreases about 3.5 percent for each 1,000 feet (304.8 meters) above sea level; and also will decrease about 1 percent for each 6'C (10 T) above 16 °C (60 T) 16'20/22 kW switch options Limited Circuits Switch Features • 16 space, 24 circuit, breakers not included. • Electrically operated, mechanically -held contacts for fast, positive connections • Rated for all classes of load,100% equipment rated, both inductive and resistive. • 2-pole, 250 VAC contactors. • 30 millisecond transfer time. • Dual coil design. • Rated for both copper and aluminum conductors. • Main contacts are silver plated or silver alloy to resist welding and sticking. • NEMA/UL 3R aluminum outdoor enclosure allows for indoor or outdoor mounting flexibility. • Multi listed for use with 1" standard, tandem, GFCI and AFCI breakers from Siemens, Murray, Eaton and Square D for the most flexible and cost effec- tive install. Dimensions Height Width Hi H2 Wi W2 Depth In 26.75 30.1 10.5 13.5 6.91 mm 679.4 764.3 266.7 343.0 175.4 Wire Ranges Conductor Lug Neutral Lug Ground Lug 1/0-#14 210-#14 2/0-#14 Model G007036-0 (116kW) Current Rating (Amps) _ 100 _ Voltage Raling'(VAG)' ` - - - _ ; ,,_--„1120/24c01 H' _ , _a• i Utility Voltage Monitor (Fixed)* y -� -Pick-up 80% -Dropout 65% Exercises bi-weekly for 5 min utes*t Standard Total Circuits Available 24 t` Tandem BreakerCapabllihes r` z a tandems ` 9 5 Circuit Breaker Protected Available RMS Symmetrical 10,000 Fault Current @ 250 Volts *Function of Evolution Controller Exercise can be set to weekly or monthly W1 • ?7 t ? .6 UDTH IW2-•i $erillCe Rated Smart %Adfl-il r-eatureS G007037-0 (16 kW)/13007039-0120 kW)/ • Includes Digital Power Management Technology standard (DPM). • Intelligently manages up to four air conditioner loads with no additional hardware. • Up to four more large (240 VAC) loads can be managed when used in conjunction with Smart Management Modules (SMMs). • Electrically operated, mechanically -held contacts for fast, clean connections. • Rated for all classes of load,100% equipment rated, both inductive and resis- tive. • 2-pole, 250 VAC contactors. • Service equipment rated, dual coil design. • Rated for both aluminum and copper conductors. , • Main contacts are silver plated or silver alloy to resist welding and sticking. • NEMA/UL 3R aluminum outdoor enclosure allows for indoor or outdoor mount- ing flexibility. Dimensions 200 Amps 120/240,10 Open Transition Service Rated Height Width H1 H2 Wi W2 Depth in 26.75 30.1 10.5 13.5 6.91 mm 679,4 764.3 266.7 343.0 175.4 Model G007043-0 (22 kW) No. of Poles• .. , . , . : � ...2.._ __.. xl;i i Current Rating (Amps) 200 Utility Voltage Monitor (Fo(ed)* -Pick-up 80% -Dropout 65% Aetumlo i111hty � _ � �-_,_P, � . _z �epprox 13_seizi µ� =��; • _� Exercises bi-weekly for 5 minutes* Standard Enclosure Type-NEMA/UL 3R tCiieoit�t3reakerProlectedt " '-:��-'=�,,.-, `, 22000 "'• , r'?-`�xE Lug Range 250 MCM - #6 *Function of Evolution Controller Exercise can be set to weekly or monthly W1 DEPTH (-- W2 I 16/20/22 W available accessories Model #. Product Desert tian - P The Wi-Fi enabled LP fuel level monitor provides constant monitoring of the connected LP fuel tank. Mon itoring the LP tank's fuel level is an important step in making sure your generator is ready to run during an G007005 0 Wi Fi LP Fuel Level Monitor unexpected powerfailure. Status alerts are available through a free application to notify when your LP tank; is in need of a refill. G006463-4 'Mobile Link- G005819-0 26R Wet Cell Battery Generac's Mobile Link allows you to check the status of your generator from anywhere that you have ac-,' cess to an Internet connection from a PC or with any smart device. You will even be notified via e-mail or: text message when a change in the generators status occurs. Available in the U.S, only. Every standby cell battery for G007101-0 Battery Pad Warmer The pad warmer (Not necessary G007102-0 ' oil Warmer Oil warmer slips :0°F. v T Auxiliary Transfer Switch The auxiliary trar G005621-0 Contact Kit you may not nee ` Fascia Base Wrap Kit ;The fascia base G007027-0 - Bisque (Standard on 22 kW) sleek, contoured holes located in, nerator requires a battery to start the system. Generac offers the recommended 26R wet le with all air-cooled standby product (excluding PowerPact®). 'ests underthe battery. Recommended for use if the temperature regularly falls below 0°F. )r use with AGM -style batteries). firectly over the oil filter. Recommended for use if the temperature regularly falls below sfer switch contact kit allows the transfer switch to lock out a single large electrical load J. Not compatible with 50 amp pre -wired switches. +rap snaps together around the bottom of the new air cooled generators. This offers a appearance as well as offering protection from rodents and insects by covering the lifting. le base. If the generator e�closure is scratched or damaged, it is important to touch-up the paint to protect from G005703-0 - Bisque Paint Kit ; future corrosion. The paint kit includes the necessary paint to properly maintain or touch-up a generator enclosure. G006485-0 Generac's scheduled maintenance kits provide all the hardware necessary to perform complete routine Scheduled Maintenance Kit maintenance on a Generac automatic standby generator. -..,..�..crn�.-.._ G006873-0_Smart Management Management Module..m.:._-,....s.-..emI,._:....�,_-�...�..._,_..._:,.,.._.-.._._��,_�s_Rv-._._..�__,.._.... __ �_..... �.. � .- -- • -- � nt Modules are used in conjunction with the Automatic Transfer Switch to increase its power management capabilities. It provides additional power management flexibility notfound in any other (50 Amps) power management system. dimensions & -UPCs Dimensions shown are approximate. Refer to installation manual for exact dimensions. DO NOT USE THESE DIMENSIONS FOR INSTALLATION PURPOSES. LEFT SIDE VIEW FROWM W i Model UPC G007035-0 696471070354 G007036-0 696471070361 G007037-0 696471070378 G007038-0 696471070385 G007039-0 696471070392 G007042-0 696471070422 0007043-0 696471070439 C3 E AYE E RA�® Generac Power Systems, Inc. • S45 W29290 HWY. 59, Waukesha, WI 53189 • generac.com ©2017 Generac Power Systems, Inc. All rights reserved. All specifications are subject to change without notice. Part No.10000000194-F 513117 U'i'l'�r�..�l���•c> ������td�t r� wj MIA- GENERACO ACCESSORIES Model e006873.0 ebus USTM Gefterac`s Smart Power Management System is designed to optimize the performance of a standby generator. The Smart ManagarRent Modules (SMM). unlike other toad management systems chat depend qn another confrot deVlsys the SiNM consist moduof upes 1 a inddiWly ideal aware and operate aufonornousty. salt - Frequency is the true measure of generator engine performance and does not need to factot to Increased ambient temperatures, generator fuel type. The ficdUleS monitor the frequency (Hz) of the power being produced of r I n Increased standby ambient and if elevation r ancerfiso ain threshold, the module will automatloally follow a power management algorithm to ensure That the generator is not overloaded. The modules can beset to stood priority between t-$ or be Set In a lock out onlymode for loads That just stmpfy cio not Rsed to ruR In an Wage reduoing the necessary size of the generator for a more cost eneoflve soldtion., #hetefore SUM SPECIFICATI(mig --� PowerSupply Source ................................................................ Supporled Voltages..290 VAG (from lure 1n ui ConfaeforColl Voltage................................_................................... .......... ................... ............. .................................................... P Gaff VA Inrush .....�.......................................... ...............I......- ...................._ ..240 VAC CollVA Sealed ................... ,......................................._._..........._..............................................................................................................,...........240 VAC poles ................................... ........... ......................................'...................................:............................................ ..... ....... .._....... ........... 30 ReslsfleeArops.................................................................................................... .�.................... .........„................... tiff F/�InduciiveAmps........... u............................................. ........ .......... ..................................... ..............................._...................................................................2 LookedRo6erAmps......................................................... ...................................................................................................................................................... 60 UI5e..... . ps......................„........... ............................................... ..........................._ ..._................�.....,....................... ... 90 Enclosurefiaung...........................................................................................-..........; .......... ...................................................... .......................29o0240V ................... .......I . _ Yes =u._.......................................................................................NEMASR Site SeleGtion and Preparation S-01 ctibn 1j: Site Sele�?-tivr, nd Rnaparation, Site Selection 3-Y. InStaliaV012 CLearattaas t� Description i I Corments A Top or generator — I B Front end end clearance Minimum oleardts`-ances cannot Include shrubs, bushes, orimes. L' Rearelderanas 18ln (45.7 ca,) r, s..ri;MUM oleaimnca perNFPAte.=tirg, labe78�g, apd lal Codes dfdate othLA+rise. isting, unless State orlOO D W►ndow$ anal openings N4 erabis I , op vindol�s doors, oropenings in the wall ara permifted wffhfa 5 ti (4.62 tn) from any point of the generator. E Bftfing wall One -hour fire rated i Va8s allow closer placement of the generator set. Confirm before lnsWaflon. P Remavable fence Removable fence earl Lis for servicing cannot be placed 100 than 3 fr (0.81 m) to front ofthe generator, G Overhead clearance 5ft (1,52 m) Vnlm►�n distance from any s#ructure, overha I)O NOT instil under wooden decks ors6ucfures unless this' tanjc cis r a ed, wait. I I i Installation Guldelinn For 60 Hz Air -Cooled Generators ; I� Site Selection and Preparation MOW onCloaUl•O would not pme any, ignition risk to nearby combustibles or structural, with) or without Ore service personnel response. i I �ravr.�4� Orr 7 ISD p do LT Pfg'Wre 2 2 SQraMWL-st Research irisuf d- JJIWWi q Based on this testing and the requirements o;1Vt=PA 37, Sec 4.1A, the guidelines for Installation of the generators listed above are changed to 16 in (457 mri) �from the book= side of the generator to a stationary wall or building A- For adequata to and airloty clearance, the area above the generator should be at iea6t 5 ;, (1.52 m) ds of the enclosure. This Includes trees, shrubs, and a minimum of 3 ft (0.91 m) at the front and en bushes, Vegetation not In compliance 1?kh these clearance parameters could obstruct air flow in addition, exhaust fumes from the generator could inhlbit plant growth. See :' ': r and the drawing Installation, within the owner's manual fortietails. Automatic start up. Disconnect [itili'ty power and render unit inoperable before working on unit' Failure to do so will result in death or serious. injury, (0omi) Asphyxiation. Running engines produce carbon monoxide, a colorless, odorless Poisonous gas. indeathorserious if iL 6r , (000�os) MOTS: If the generator Is not set to QFP, .h can crank and start as soon as the battery cables are conneoted.;lf the utility power supply is not turned off, sparking can c+ccur It the battery posts and cause an explosion. Q Site Nemp ano'n ° Locate the mounting area as close as possible t, the transfer switch and fuel supply. ° Leave adequate room around the area for service access (check local code), and place high enougi, to keep rising water from reaching the generator. Choose an open space that trAll provide adequate and unobstructed airnow, ° Place the unit so air vents won't became clogged wi-.h leases, grass, snow, or debris. Verify that exhaust fumes will not enter any building through eaves, windows, ventilation fans, or other air intakes (see C Yea- ° Select the type of base, such as —but not limited to --compacted soil, gravel, or concrete, as desired or as required by local laws or codes. Verify your local requirements before selecting. 41aterlal sufficient for i.vvel installation ion ° Prepare a rectangular area approximately S In (127 mm) deep (A) and approximately 6 in (152 mm) longer and wider (13) than file footprint of the generator. Verify that the surface where the generator will be mounted Is compacted, leveled, and will not erode over time. A concrete pad can be Poured if desired or required. Figure X3, compacted sari orGravel Pad flt4'1'1;: If a concrete pad is required, follow an applicable federal, state, or local codes. ir�statlation Quldeilnes har60 Hz Air Cooled Generators is