{
"nec_cycle": "2023",
"checks": [
{
"section": "690.7",
"topic": "Max system voltage (cold Voc)",
"status": "PASS",
"evidence": "7S cold Voc 430.1 V <= 480 V design / 500 V abs (margin 69.9 V). Tmin -40C; analytic+pvlib agree."
},
{
"section": "690.8(A)",
"topic": "Max circuit current (Isc x 1.25)",
"status": "PASS",
"evidence": "PV source max current 17.3 A (Isc 13.87 x 1.25)."
},
{
"section": "690.8(B)",
"topic": "Conductor ampacity after 310.15 derates",
"status": "PASS",
"evidence": "PV string 8 Cu: 75C 50A, derated 40.0A >= req 17.3A."
},
{
"section": "690.9 / 690.9(A) Ex",
"topic": "PV source overcurrent (string fusing)",
"status": "PASS",
"evidence": "Not required: 1 string per MPPT (no parallel strings), so no source-circuit fault current can exceed module 30A series-fuse rating. Each MPPT isolated."
},
{
"section": "690.9 / 240 / 480.9",
"topic": "Battery overcurrent (Class-T)",
"status": "PASS",
"evidence": "175A Class-T (DC, 20kAIC) >= 125%x126.0A; <= cable 2/0 ampacity 175A."
},
{
"section": "690.9 / 710.15",
"topic": "Inverter AC output overcurrent",
"status": "PASS",
"evidence": "35A 2-pole >= 125% x 25.0A; protects 8 Cu (240.4(D))."
},
{
"section": "690.12",
"topic": "Rapid shutdown",
"status": "VERIFY-AHJ",
"evidence": "Ground-mounted array NOT on a building: 690.12 (NEC 2023) applies to PV on/in buildings. 6000XP has a built-in RSD initiator if AHJ requires it for conductors entering the dwelling. Confirm AHJ stance for the detached ground-mount."
},
{
"section": "690.13",
"topic": "PV disconnecting means",
"status": "PASS",
"evidence": "6000XP integrated DC switch per MPPT; add an external load-break PV/DC disconnect at the inverter for service isolation."
},
{
"section": "690.15",
"topic": "Disconnect for equipment",
"status": "PASS",
"evidence": "Battery disconnect (switch or the Class-T fused disconnect) within sight of inverter."
},
{
"section": "690.11 / 690.41",
"topic": "DC arc-fault + system grounding (GFDI)",
"status": "PASS",
"evidence": "6000XP integrated PV AFCI (690.11) and PV ground-fault/isolation protection (690.41/690.5)."
},
{
"section": "690.43",
"topic": "Equipment grounding & bonding",
"status": "PASS",
"evidence": "EGCs: PV 10 / battery 6 / AC 10 AWG Cu; bond array frames + all enclosures."
},
{
"section": "690.45",
"topic": "Size of EGC (250.122)",
"status": "PASS",
"evidence": "Battery EGC 6 AWG (OCPD 175A); AC EGC 10 AWG (OCPD 35A); PV EGC min 10 AWG (no source OCPD)."
},
{
"section": "690.47",
"topic": "Grounding electrode (array + DC)",
"status": "ACTION",
"evidence": "Ground-mount: drive an array grounding electrode (rod) and bond per 690.47(A); min 6 AWG Cu GEC, common with the dwelling grounding electrode system."
},
{
"section": "690.31",
"topic": "Wiring methods",
"status": "PASS",
"evidence": "PV in conduit (Sched-40 PVC, squirrel/UV protection per Swarm \u00a716); 8 Cu PV wire/THWN-2 90C."
},
{
"section": "706.30 / 480.7",
"topic": "ESS disconnecting means",
"status": "PASS",
"evidence": "Battery disconnect + Class-T fuse; lockable; within sight of the ESS."
},
{
"section": "706.31 / 480.9",
"topic": "ESS overcurrent protection",
"status": "PASS",
"evidence": "175A Class-T at the battery positive, interrupt 20kAIC > pack fault current."
},
{
"section": "710.15",
"topic": "Stand-alone system output",
"status": "PASS",
"evidence": "6000XP 6kW 120/240 split-phase; output 25.0A; no utility backfeed (off-grid)."
},
{
"section": "705",
"topic": "Interconnection (120% / backfeed)",
"status": "N/A",
"evidence": "Off-grid, no utility interconnection. Main panel subfed with main breaker locked off (Swarm \u00a717)."
},
{
"section": "690.53/690.54/690.56/110.21",
"topic": "Labels & placards",
"status": "ACTION",
"evidence": "Required: max system voltage (690.53), inverter output rating (690.54), rapid-shutdown placard if applicable (690.56(C)), DC disconnect & directory, battery hazard label. Generate per the computed ratings."
},
{
"section": "Voltage drop (design target)",
"topic": "DC<=2% / batt<=1% / AC<=2%",
"status": "PASS",
"evidence": "DC 1.329% (150-250ft: {'150': 0.997, '200': 1.329, '250': 1.661}); battery 0.476%; AC 0.162%. (Informational; not NEC-mandated.)"
}
],
"summary": {
"PASS": 16,
"VERIFY-AHJ": 1,
"ACTION": 2,
"N/A": 1
}
}