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PAGE REV: B1 12/10/2024 2500 WHITE RD. SUITE A, IRVINE CA 92614 PHONE 805.540.7603 FAX 949.215.7778 ISIDRO MENDOZA 2701 S POPLAR ST, SANTA ANA, CA, 92704 PROJECT NUMBER: 109R-701MEN1 SHEET DESIGNER: VISHNUMAYA KP CUSTOMER RESIDENCE: TEL. (714) 697-7230 APN: 140-273-07 GILBERT CORREIA, C10, C46 CA CL #750184 (415) 580-6920 ex3 SYSTEM INFORMATION 7.505 KW DC PHOTOVOLTAIC SYSTEM (12) LONGI GREEN ENERGY TECHNOLOGY CO LTD: LR5-54HABB-395M, TESLA: POWERWALL 3 1707000-XX-Y (7) LONGI GREEN ENERGY TECHNOLOGY CO LTD: LR5-54HABB-395M, TESLA: POWERWALL 3 1707000-XX-Y SYSTEM OCPD SIZE (COMBINED MAX CURRENT) X (CONTINUOUS LOAD) = 112 A X 1.25 = 140 A → 70 A OVERCURRENT PROTECTION GATEWAY SYSTEM AC WIRE SIZING MAX AC OUTPUT CURRENT = 70 A ADJUSTED CONDUCTOR AMPACITY = (HIGH TEMP)[TABLE 310.15(B)(1)(1)] X (CONDUIT FILL)[TABLE 310.15(C)(1)] X (CONDUCTOR AMPACITY)[TABLE 310.16] = 0.91 X 1 X 95A = 86.45A TERMINAL RATING[110.14(C)] = 4 AWG, 75°C RATED = 85A 85A < 86.45A TERMINAL RATING GOVERNS CONDUCTOR SIZING 70A < 85A 4 AWG AMPACITY OK THEREFORE 4 AWG IS SUFFICIENT. ALLOWABLE BACKFEED MAX ALLOWED TOTAL GENERATION BACKFEED OCPD = MAIN BREAKER RATING = 100A 70A ≤ 100A→ INTERCONNECTION MEETS CEC 705.13 REQUIREMENTS. INVERTER INFORMATION 4740 KW DC PHOTOVOLTAIC SYSTEM (12) LONGI GREEN ENERGY TECHNOLOGY CO LTD: LR5-54HABB-395M, TESLA: POWERWALL 3 1707000-XX-Y INVERTER OVERCURRENT PROTECTION (INVERTER MAX CURRENT) X (CONTINUOUS LOAD) = 48 A X 1.25 = 60 A → 60 A OVERCURRENT PROTECTION PER MANUFACTURER DC WIRE SIZING MAX CIRCUIT CURRENT = (MODULE ISC) X (HIGH IRRADIANCE)[690.8(A)(1)] X (CONTINUOUS LOAD)[690.8(B)(1)]= 14.88A X 1.25 X 1.25 = 23.25A ADJUSTED CONDUCTOR AMPACITY = (HIGH TEMP)[TABLE 310.15(B)(1)] X (CONDUIT FILL)[TABLE 310.15(C)(1)] X (CONDUCTOR AMPACITY)[TABLE 310.16] = 0.91 X 1 X 40A = 36.4A TERMINAL RATING[110.14(C)] = 10 AWG, 75°C RATED = 35A 35A < 36.4A → TERMINAL RATING GOVERNS CONDUCTOR SIZING. 23.25A < 35A → 10 AWG AMPACITY OK THEREFORE 10 AWG IS SUFFICIENT. AC WIRE SIZING MAX AC OUTPUT CURRENT = (MAX INVERTER OUTPUT) X (CONTINUOUS LOAD)[210.19(A)(1)] = 48 A X 1.25 = 60 A ADJUSTED CONDUCTOR AMPACITY = (HIGH TEMP)[TABLE 310.15(B)(1)] X (CONDUIT FILL)[TABLE 310.15(C)(1)] X (CONDUCTOR AMPACITY)[TABLE 310.16] = 0.91 X 1 X 75A = 68.25A TERMINAL RATING[110.14(C)] = 6 AWG, 75°C RATED = 65A 65A < 68.25A → TERMINAL RATING GOVERNS CONDUCTOR SIZING. 60A < 65A → 6 AWG AMPACITY OK THEREFORE 6 AWG IS SUFFICIENT. SYSTEM CHARACTERISTICS MAX OPEN CIRCUIT VOLTAGE = {[((TEMP COEF VOC) X (VOC)) / 100] X [LOW TEMP - STC TEMP] + VOC} X (# MODULES / STRING) = {[(-0.26 %/°C X 36.81 V) / 100] X [-2 °C - 25 °C] + 36.81 V} X 12 = 472.72 V SHORT CIRCUIT CURRENT = 1.25 X (MODULE ISC) X (# STRINGS) 1.25 X 14.88 A X 1 = 18.6A INVERTER INFORMATION 2765 KW DC PHOTOVOLTAIC SYSTEM (7) LONGI GREEN ENERGY TECHNOLOGY CO LTD: LR5-54HABB-395M, TESLA: POWERWALL 3 1707000-XX-Y INVERTER OVERCURRENT PROTECTION (INVERTER MAX CURRENT) X (CONTINUOUS LOAD) = 48 A X 1.25 = 60 A → 60 A OVERCURRENT PROTECTION PER MANUFACTURER DC WIRE SIZING MAX CIRCUIT CURRENT = (MODULE ISC) X (HIGH IRRADIANCE)[690.8(A)(1)] X (CONTINUOUS LOAD)[690.8(B)(1)]= 14.88A X 1.25 X 1.25 = 23.25A ADJUSTED CONDUCTOR AMPACITY = (HIGH TEMP)[TABLE 310.15(B)(1)] X (CONDUIT FILL)[TABLE 310.15(C)(1)] X (CONDUCTOR AMPACITY)[TABLE 310.16] = 0.91 X 1 X 40A = 36.4A TERMINAL RATING[110.14(C)] = 10 AWG, 75°C RATED = 35A 35A < 36.4A → TERMINAL RATING GOVERNS CONDUCTOR SIZING. 23.25A < 35A → 10 AWG AMPACITY OK THEREFORE 10 AWG IS SUFFICIENT. AC WIRE SIZING MAX AC OUTPUT CURRENT = (MAX INVERTER OUTPUT) X (CONTINUOUS LOAD)[210.19(A)(1)] = 48 A X 1.25 = 60 A ADJUSTED CONDUCTOR AMPACITY = (HIGH TEMP)[TABLE 310.15(B)(1)] X (CONDUIT FILL)[TABLE 310.15(C)(1)] X (CONDUCTOR AMPACITY)[TABLE 310.16] = 0.91 X 1 X 75A = 68.25A TERMINAL RATING[110.14(C)] = 6 AWG, 75°C RATED = 65A 65A < 68.25A → TERMINAL RATING GOVERNS CONDUCTOR SIZING. 60A < 65A → 6 AWG AMPACITY OK THEREFORE 6 AWG IS SUFFICIENT. SYSTEM CHARACTERISTICS MAX OPEN CIRCUIT VOLTAGE = {[((TEMP COEF VOC) X (VOC)) / 100] X [LOW TEMP - STC TEMP] + VOC} X (# MODULES / STRING) = {[(-0.26 %/°C X 36.81 V) / 100] X [-2 °C - 25 °C] + 36.81 V} X 4 = 157.57 V SHORT CIRCUIT CURRENT = 1.25 X (MODULE ISC) X (# STRINGS) 1.25 X 14.88 A X 1 = 18.6A PV-4.2 ELECTRICAL CALCS 2701 S Poplar St 3/10/2025