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PAGE REV: C2 5/15/2025 VICTORIA HUYNH 1915 TRASK AVE, SANTA ANA, CA, 92706 PROJECT NUMBER: 109R-915HUYN SHEET DESIGNER: NOORUDDIN AJAM CUSTOMER RESIDENCE: TEL. (714) 519-8517 APN: 101-042-29 (415) 580-6920 ex3 Template_version_v5_2024 02 28 2500 WHITE RD. SUITE A, IRVINE CA 92614 PHONE 805.540.7603 FAX 949.215.7778 CA CL #750184 GILBERT CORREIA, C10, C46 #ESTAMP SYSTEM INFORMATION 15.01 KW DC PHOTOVOLTAIC SYSTEM (14) LONGI GREEN ENERGY TECHNOLOGY CO LTD: LR5-54HABB-395M, TESLA: POWERWALL 3 1707000-XX-Y (12) LONGI GREEN ENERGY TECHNOLOGY CO LTD: LR5-54HABB-395M, TESLA: POWERWALL 3 1707000-XX-Y (12) LONGI GREEN ENERGY TECHNOLOGY CO LTD: LR5-54HABB-395M, TESLA: POWERWALL 3 1707000-XX-Y ALLOWABLE BACKFEED MAX ALLOWED TOTAL GENERATION BACKFEED OCPD = MAIN BREAKER RATING = 200A 180A ≤ 200A→ INTERCONNECTION MEETS 705.13 REQUIREMENTS. SYSTEM OCPD SIZE (COMBINED MAX CURRENT) X (CONTINUOUS LOAD) = 48 A X 1.25 = 60 A → 60 A OVERCURRENT PROTECTION 48 A X 1.25 = 60 A → 60 A OVERCURRENT PROTECTION 48 A X 1.25 = 60 A → 60 A OVERCURRENT PROTECTION INVERTER INFORMATION 5530 KW DC PHOTOVOLTAIC SYSTEM (14) 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)]= 15A X 1.25 = 18.75A 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 0.8 X 40A = 29.12A TERMINAL RATING[110.14(C)] = 10 AWG, RATED = 35A 29.12A < 35A → TERMINAL RATING GOVERNS CONDUCTOR SIZING. 18.75A < 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 0.8 X 75A = 81.25A TERMINAL RATING[110.14(C)] = 6 AWG, RATED = 65A 65A < 81.25A → 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 7 = 276 V SHORT CIRCUIT CURRENT = 1.25 X (MODULE ISC) X (# STRINGS) 1.25 X 14.79 A X 2 = 36.97A 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)]= 15A X 1.25 = 18.75A 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, RATED = 35A 35A < 36.4A → TERMINAL RATING GOVERNS CONDUCTOR SIZING. 18.75A < 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 0.8 X 75A = 81.25A TERMINAL RATING[110.14(C)] = 6 AWG, RATED = 65A 65A < 81.25A → 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 = 473 V SHORT CIRCUIT CURRENT = 1.25 X (MODULE ISC) X (# STRINGS) 1.25 X 14.79 A X 1 = 18.48A 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)]= 15A X 1.25 = 18.75A 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, RATED = 35A 35A < 36.4A → TERMINAL RATING GOVERNS CONDUCTOR SIZING. 18.75A < 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 0.8 X 75A = 81.25A TERMINAL RATING[110.14(C)] = 6 AWG, RATED = 65A 65A < 81.25A → 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 = 473 V SHORT CIRCUIT CURRENT = 1.25 X (MODULE ISC) X (# STRINGS) 1.25 X 14.79 A X 1 = 18.48A PV-4.1 ELECTRICAL CALCS C2 C2