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sunrunzz- <br />20512 CRESCEIVT &AY S1JITE 103 LAXE FORESI CA <br />GILBERT CORREIA C1O C46 <br />cA cL #750184 <br />CUSTOMER RESIDENCE: <br />DOROTHY FENTON <br />2853 SAWGRASS DR. SANTA <br />ANA, CA. 92706 <br />rEL 014) 972-1924 <br />APN #: 232-,l0'l-19 <br />PROJECT NUMBER <br />1O9R.853FENT <br />(415) 580-6920 ex3DESIGNER: <br />WEI ZENG <br />SHEET <br />ELECTRICAL CALCS <br />REV: B 12t19t2020 <br />System lnformation <br />6.3 kW DC Photovoltaic System <br />(20) LONGi Green Energy Technology Co Ltd: LR6-60HPH-315M, Delta Electronics: E6-TL-US <br />Allowable Backfeed <br />Allowable Backfeed = (Main Panel Rating) x 1.2 - (Main Breaker Rating) = <br />2254x1.2-200A=70A <br />30A s 70A lnterconnection meets 705.12(B)(2) requirements. <br />DC \Mre Sizing <br />Max Circuit Current = (Module lsc) x (High lrradiance)[690.8(AX1)] x (Continuous Load)[690.8(B)(1)] = <br />9.94Ax1.56=15.51A <br />Adjusted Conductor Ampacity = (High Temp)[Table 31 0.1 5(B)(2)(a)] x (Conduit Fill)[Table <br />310.15(BX3Xa)l x (Conductor Ampacity)[Table 310.15(B)(16)] = <br />0.71 x0.8x40A=22.72A <br />Terminal Rating[1 1 0.14(C)] = <br />10 AWG, 75"C Rated = 35A <br />22.724 < 354 Adjusted conductor ampacity governs conductor sizing. <br />15.51A < 22.724 10 AWG Ampacity OK <br />Therefore 10 AWG is sufficient. <br />AC Wre Sizing <br />Max AC Output Current = (Max lnverter Output) x (Continuous Load)[210.19(A)(1)] = <br />24 Ax 1.25 = 30 A <br />Adjusted ConductorAmpacity = (High Temp)[Table 310.15(B)(2Xa)] x (Conduit Fill)[Table <br />310.1 5(B)(3)(a)l x (Conductor Ampacity)[Table 310.15(B)(16)] = <br />0.91 xlx55A=50.05A <br />Terminal Rating[1 10.14(C)] = <br />8 AWG, 75'C Rated = 50A <br />50A < 50.05A Terminal rating governs conductor sizing. <br />40A < 50A 8 AWG Ampacity OK <br />Therefore 8 AWG is sufficient. <br />lnverter Overcurrent Protection <br />(lnverter Max Current) x (Continuous Load) = <br />24 A x 1.25 = 30 A 40 A Overcurrent Protection Per Manufacturer <br />System Characteristics <br />Operating Voltage = (Module VMP) x (# Modules / String) = <br />33.7Vx7=235.9V <br />MaxOpenCircuitVoltage ={[((TempCoefVOC) x(VOC)) /100] x[LowTemp-STCTemp] +VOC] <br />x (# Modules / String) = <br />{[(-0.286 o/ol'C x 40.6 V) / 1 00] x l-2 "C - 25'Cl + 40.6 V] x 7 = 306.1 5 V <br />Operating Current = (Module IMP) - (# Strings) = <br />9.36Ax3=28.08A <br />Short Circuit Current = 1.25 x (Module lsc) x (# Strings) <br />1.25x9.94Ax3=37.27A PAGE PV-4.1