#11Solar PV Plant Inspection
Multi-Asset / Multi-Point Equipment Schedule
Inspect multiple transformers, panels, rooms, motors, or RCDs in this module without overwriting previous assets. Each item receives a permanent QR Sticker UID preserved across annual audits.
Sticker UID: OC-SOLA-BB84Standard Limits, Equations & Space Presets
IEC 62446-1 Category 1 & Category 2 PV array commissioning criteria: string Voc temperature correction, string Isc uniformity, DC insulation resistance by system voltage, and frame bonding continuity.
Measured Inputs
Calculated / Evaluated Results
Acceptance: IEC 62446-1 - the insulation resistance limit follows the system / test voltage selected, string Voc within +/-5% of the temperature corrected expectation, string current imbalance <= 5%, protective earth continuity <= 1 Ohm.
Pending / Not tested — results stay neutral until valid measured values are entered.
- Pending
Voc Deviation vs Expected
- %
Not tested - enter the measured value. Acceptance: String Voc within +/-5% of the temperature corrected expected value [IEC 62446-1 §6.3 (field criterion)]
- Pending
String Insulation Resistance
- MOhm
Not tested - enter the measured value. Acceptance: Riso >= 1 MOhm for 120 - 500 V (test 500 V) [IEC 62446-1 Table 3]
- Pending
String Current Imbalance
- %
Not tested - enter the measured value. Acceptance: Imbalance <= 5% between strings measured under the same irradiance [IEC 62446-1 §6.4 practice]
- Pending
Protective Earth Continuity
- Ohm
Not tested - enter the measured value. Acceptance: Frame and array bonding continuity <= 1 Ohm [IEC 62446-1 §6.1 / IEC 60364-4-41]
- Pending
Test Irradiance Validity
- W/m2
Not tested - enter the measured value. Acceptance: Irradiance >= 400 W/m2 for a meaningful Voc / Isc comparison [IEC 62446-1 §6.3 practice]
Verification Checklist (0 / 18)
1PV array string architecture, module model, and inverter schedule match as-built documentation [IEC 62446-1 §5]
2Modules visually free of shattered glass, backsheet delamination, snail trails, or junction box distortion
3Aerial / handheld IR thermography (IEC TS 62446-3) completed at >= 600 W/m2; no cell hotspots or shorted bypass diodes
4Mounting rails, wind bracing, and mid/end module clamps torque-verified and free of galvanic corrosion
5Equipotential frame bonding jumpers and array Protective Earth continuity verified (<= 1.0 Ohm)
6DC solar cables (EN 50618 H1Z2Z2-K) UV-resistant, supported off roof surface, and protected at sharp edges
7Positive and negative DC string conductors routed together to minimize inductive lightning loop area [IEC 62446-1 §5.3]
8MC4 / DC plug connectors of identical manufacturer & model mated (zero cross-mating of incompatible brands!)
9String overcurrent fuses (gPV) and DC load-break isolators rated for 1.15x Voc_max and 1.25x Isc_max
10Open-circuit voltage Voc measured on every string within +/-5% of cell-temperature-corrected expectation
11Short-circuit current Isc (or operating MPPT current) uniform within <= 5% across parallel strings
12Polarity of every DC string verified prior to closing string fuses or inverter DC switch
13Array DC insulation resistance R_iso (Pos-to-Earth & Neg-to-Earth) meets IEC 62446-1 Table 3 (>= 1.0 MOhm)
14DC Type 1+2 and AC Type 2 Surge Protective Devices (SPDs) healthy with intact backup protection
15Inverter internal Residual Current Monitoring Unit (RCMU) and Ground Fault Detection (GFDI) self-test passed
16Loss-of-Mains (Anti-Islanding / RoCoF / Vector Shift) protection verified within grid code disconnection time
17Emergency DC Firefighter Switch / Rapid Shutdown signage and access compliant at building entrance
18SCADA / portal irradiance pyranometer and Performance Ratio (PR %) cross-checked with calibrated hand instruments
General Notes
Free plan: 5 of 5 inspections / calculations left this month.