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PAGE <br />REV: I 2/14/2025 <br />MIGUEL TOLEDO <br />2140 S BROADWAY, SANTA ANA, <br />CA, 92707 <br />PROJECT NUMBER: <br /> 109R-140TOLE <br />SHEET <br />DESIGNER: <br />AL AMEEN V H <br />CUSTOMER RESIDENCE: <br />TEL. (714) 272-5451 <br />APN: 015-082-22 <br />(415) 580-6920 ex3 <br />Template_version_v5_2024.02.28 <br />2500 WHITE RD. SUITE A, IRVINE CA 92614 <br />PHONE 805.540.7603 <br />FAX 949.215.7778 <br />CA CL #750184 <br />GILBERT CORREIA, C10, C46 <br />PV-4.1 <br />ELECTRICAL CALCS <br />#ESTAMP <br />SYSTEM INFORMATION <br />2.765 KW DC PHOTOVOLTAIC SYSTEM <br /> (7) LONGI GREEN ENERGY TECHNOLOGY CO LTD: LR5-54HABB-395M, TESLA: POWERWALL 3 <br />1707000-XX-Y <br />SYSTEM OCPD SIZE   <br />(COMBINED MAX CURRENT) X (CONTINUOUS LOAD) =    <br />  96 A X 1.25 = 120A → 100A OVERCURRENT PROTECTION UTILIZING PCS <br />ALLOWABLE BACKFEED <br />MAX ALLOWED TOTAL GENERATION BACKFEED OCPD = MAIN BREAKER RATING = <br />100A <br />100A ≤ 100A→ INTERCONNECTION MEETS 705.13 REQUIREMENTS. <br />GATEWAY SYSTEM AC WIRE SIZING <br />MAX AC OUTPUT CURRENT = 100 A <br />ADJUSTED CONDUCTOR AMPACITY = (HIGH TEMP)[TABLE 310.15(B)(1)(1)] X (CONDUIT FILL)[TABLE <br />310.15(C)(1)] X (CONDUCTOR AMPACITY)[TABLE 310.16] = <br />0.91 X 1 X 115A = 104.65A <br />TERMINAL RATING[110.14(C)] = <br />3 AWG, 75°C RATED = 100A <br />100A < 104.65A → TERMINAL RATING GOVERNS CONDUCTOR SIZING <br />100A ≤ 100A → 3 AWG AMPACITY OK <br />THEREFORE 3 AWG IS SUFFICIENT. <br />INVERTER INFORMATION <br />2765 KW DC PHOTOVOLTAIC SYSTEM <br /> (7) LONGI GREEN ENERGY TECHNOLOGY CO LTD: LR5-54HABB-395M, TESLA: POWERWALL 3 <br />1707000-XX-Y <br />INVERTER OVERCURRENT PROTECTION <br />(INVERTER MAX CURRENT) X (CONTINUOUS LOAD) = <br />48 A X 1.25 = 60 A → 60 A OVERCURRENT PROTECTION PER MANUFACTURER <br />DC WIRE SIZING <br />MAX CIRCUIT CURRENT = (MODULE ISC) X (HIGH IRRADIANCE)[690.8(A)(1)] X (CONTINUOUS <br />LOAD)[690.8(B)(1)]= <br />15A X 1.25 = 18.75A <br />ADJUSTED CONDUCTOR AMPACITY = (HIGH TEMP)[TABLE 310.15(B)(1)] X (CONDUIT FILL)[TABLE <br />310.15(C)(1)] X (CONDUCTOR AMPACITY)[TABLE 310.16] = <br />0.91 X 1 X 40A = 36.4A <br />TERMINAL RATING[110.14(C)] = <br />10 AWG, 75°C RATED = 35A <br />35A < 36.4A → TERMINAL RATING GOVERNS CONDUCTOR SIZING <br />18.75A < 35A → 10 AWG AMPACITY OK <br />THEREFORE 10 AWG IS SUFFICIENT. <br />AC WIRE SIZING <br />MAX AC OUTPUT CURRENT = (MAX INVERTER OUTPUT) X (CONTINUOUS LOAD)[210.19(A)(1)] = <br />48 A X 1.25 = 60 A <br />ADJUSTED CONDUCTOR AMPACITY = (HIGH TEMP)[TABLE 310.15(B)(1)] X (CONDUIT FILL)[TABLE <br />310.15(C)(1)] X (CONDUCTOR AMPACITY)[TABLE 310.16] = <br />0.91 X 1 X 75A = 68.25A <br />TERMINAL RATING[110.14(C)] = <br />6 AWG, 75°C RATED = 65A <br />65A < 68.25A → TERMINAL RATING GOVERNS CONDUCTOR SIZING <br />60A < 65A → 6 AWG AMPACITY OK <br />THEREFORE 6 AWG IS SUFFICIENT. <br />SYSTEM CHARACTERISTICS <br />MAX OPEN CIRCUIT VOLTAGE = {[((TEMP COEF VOC) X (VOC)) / 100] X [LOW TEMP - <br />STC TEMP] + VOC} X (# MODULES / STRING) = <br />{[(-0.26 %/°C X 36.81 V) / 100] X [-2 °C - 25 °C] + 36.81 V} X 7 = 276.5 V <br />SHORT CIRCUIT CURRENT = 1.25 X (MODULE ISC) X (# STRINGS) <br />1.25 X 14.79 A X 1 = 18.48A <br />I 2140 S Broadway <br />3/21/2025