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3920 Watt to 10080 Watt DC Photovoltaic System Electrical Diagram Solaredge SE 760OA-US Inverter with OOOOne to Two strings of Solarworld SW280 Modules and Solaredge P300 Optimizers Tot�� Optional Supply Side Connection Maximum 18 modules per NEC 705.12A 10 string and minimum 8 modules Solarworld Lt SW280 280 , #t8 per string as per Solaredge N M Modules olaredge P300 #6 bare copp Power Optimizers GEC (3)#6 Utility meter THHNITHWN•2 200A 13W'PVC condu (4)#10 AWG PV wire 2-B,2-R Module power ptimizer so A fused (1)#5 Bare Copper Factory Factory Cable Solarworld SW280 disconnectwith = DC leads 40Afuses existing Main Distribution Solaredge P300 PowerOpt!mizer Module Specs ei�oae Panel :280] Max input power:300 Wp-dc Pmax:280Wp #8 Max.Input DC Voltage:48 VDC Voc: 39.5 V 200A Panelboard Max Input current: 12.5A Vmpp:31.2 V MPPT Range:8.48 VDC Isc: 9.71 A with 200A main Max Output Voltage:80 VDC breaker Max Output current: 15A Impp: 9.07 A O 200A-2 Notes: All work to meet or exceed NEC 2011 Olunction box to be located within the array boundary. Junction box must be minimum Nema 3R UL listed Oenclosure.Free air conductors must be installed in raceway if readily accessible as per 690.31(A). (DO (4)#10 AWG THHNITHWN-2 2OThe minimum volume of the Nema 3R enclosure for the transition of PV wire to THWN-2 wire shall be O (1)#8 AWG THHNrrHWN-2 42 cubic inches. Heyco 5 wire Masthead gland seals or similar connector are required as strain relief Nema 3R 2-13,2-R,1-G for PV wire into Nema 3R junction box at array. O 40A/2 Junction 3/4"EMT,FMC(inside structure) interconnection with 40 Amp 2 pole OCPD via 2011 NEC 705.12(D)(2)Load Side Connection. The 40 A Box LFNC,PVC(outside structure) backfed breaker must be located at the opposite end of the bus from the 200 A main supply breaker I 690.31E 4O. The required PV Backfed breaker plus the main breaker rating must be less than or equal to 120%of 1 ) the Main service bus rating. 705.12(D)(2) Solaredge SE7600A-US OOptional Supply Side connection via 705.12A using parallel line taps in a NEMA 3R box(as required) _ Transformerless Inverter with using NSI IPCS4002, Ilsco]PC-KUP-L or NSI Tork IPLD 3/0-3 Multi-Tap Connector or equivalent. I-I °C inte rated DC disconnect. existing I I AC g 6OPV service disconnecting means for"optional"supply side connection must have neutral/EGC bond grounding rill , within and must be listed as"suitable for use as service equipment" 230.66 electrode (4)#8 AWG THHN/THWN-2 7O. The fuses in the disconnect for the"supply side"option must be rated to handle the maximum short- 1-B,1-R,1-W,1-Gcircuit current available at the supply terminals.110.9,110.10 Over-current protection for the supply side , 314"EMT,FMC,LFNC, connected conductors shall be located within 10 feet of the connection to the service. 705.31 b or PVC 88.. The following label is required on meter can and main panelboard"Service q q _________ is fed from dual power sources Utility and Photovoltaic system" 8. 'PV input Do not relocate this OCPD"label required adjacent to backfed breaker. 705.12(d)(7) (4)#8 AWG THHNrrHWN-2 10 Bonding of module to rail and module to module accomplished through WEEB 1-B,1-R,1-W,1-G washers or self grounding mid-clamps. 3/4"EMT,FMC,LFNC,or PVC 11. "Warning:DC conductors of this system are ungrounded and may be energized"required on the DC Disconnect 690.35F 12.."Warning:Photovoltaic Power Source"label required on conduit per 690.31(E)(3)(4) 13.Total voltage drop%for all circuits based on listed conductors is 1.64%based on: If required by Utility A.100 foot round trip PV wire open air run to Nema 3R junction box 60A 240V AC Disconnect with label: 11 B.150 round trip source circuits(THWN-2)to termination in DC disconnect C.30 feet round trip Inverter Output circuit to point of interconnection. Disconnect Switch On-site Utility Generation DC Disconnect Label D.Conductors should be sized for max 2%voltage drop to decrease possible Disco inverter shutdown and production losses due to AC voltage rise at the inverter. Requirements P g Vmpp 350 vdc PV AC Disconnect Label Requirements Vmax 500 vdc Operating Current:32A Im 11.2 to 23 A based on array--A Formula to figure IMPP for of Disconnect PP ( Y Total STC DC power rating of array in Watts Operating Voltage: 240V nameplate rating) divided by 350 Vdc equals IMPP In Amps. Imax 15 or 30 A (1 or 2 strings) ex:3920 watts/350 Vdc=11.2 Amps