PV System Commissioning & Quality Audit — Free Template

Date commissioned

Commissioning agent name and license number

Name and electrical license / certification number of the agent performing this audit.

Site address

System size (DC)

Total array nameplate DC power.

System size (AC)

Combined inverter continuous AC output rating.

Module make, model, and quantity

e.g. manufacturer, model, and total module count.

Inverter make, model, and quantity

Include microinverter / optimizer count if applicable.

Inverter architecture

Mounting / racking type

Photo of torque-mark on representative fasteners

Capture witness/paint marks showing fasteners were torque-verified.

Modules fully seated and secured in clamps / rails

Roof penetrations flashed and weatherproofed

Each attachment point sealed against water intrusion per the flashing system instructions. N/A for ballasted or ground-mount systems.

Rails bonded and grounding hardware installed correctly

Bonding jumpers / WEEB-style washers present and seated so the rails form a continuous bonded path.

Conduit and cable runs supported, secured, and protected from abrasion

Open-circuit voltage (Voc) — representative string

Measure Voc per string and record it alongside the temperature-corrected design value for comparison.

String Voc within tolerance of the design value

Compare each measured Voc to the temperature-corrected design value (commonly within about 5%). A large deviation can indicate a wrong string length, an open module, or a wiring fault.

Short-circuit current (Isc) — representative string

Informational: compare to module datasheet Isc scaled for present irradiance.

Operating current (Imp) — representative string

Informational: compare to expected operating current at present conditions.

DC connectors fully seated and of compatible type

Cross-mated connector brands and unseated connectors are a leading cause of DC arcing fires.

DC conductors sized and rated per the approved design

Conductor ampacity and temperature/voltage rating match the plan set and the calculated continuous current.

DC disconnect operates and isolates the array

Backfed OCPD / breaker rating at the interconnection

Informational: record the ampere rating of the breaker or fuse protecting the PV connection so it can be checked against the design and the busbar rule.

Overcurrent protection sized correctly for the inverter outputCritical

Backfed breaker / fuse sized for 125% of continuous inverter output and within the equipment rating (NEC 690 / 705). An undersized or oversized device is a fire and equipment-protection hazard.

AC conductors sized and rated per the approved design

Interconnection method compliant with the 120% busbar rule

Sum of the main breaker and the backfed PV breaker is within the panel busbar allowance, with the PV breaker at the opposite end of the bus (NEC 705 — reference). N/A for a supply-side / line-side tap.

AC disconnect installed, accessible, and operates correctly

Utility-accessible AC disconnect where required by the serving utility.

Neutral and equipment-ground bonded at one point only

Confirm a single neutral-to-ground bond at the service; no improper bonds downstream that would put current on the equipment-grounding conductor.

Grounding electrode conductor / ground rod installed and connected

Module frames bonded with listed bonding hardware

Bonding-path continuity resistance

Measure resistance from a representative module frame back to the main grounding point. Graded: a low value confirms an effective bond; a high reading indicates a loose or corroded connection.

Test voltage used and notes

Record the insulation-test voltage applied and any conductors excluded from the test.

Rapid shutdown functions and de-energizes the array on commandCritical

Initiate rapid shutdown and confirm conductors reach the safe state within the required time (NEC 690.12 — reference). A non-functional rapid-shutdown system is a first-responder life-safety hazard.

Rapid-shutdown initiator clearly labeled at the service / disconnect

Required PV system labels and placards present and legibleCritical

Includes the AC/DC disconnect labels, rapid-shutdown placard, dual-power-source warning, and interconnection markings required by NEC 690 / 705 (reference). Missing or illegible placards leave responders unaware of the energy source.

Photo of installed labels and placards at the service equipment

Inverter shows no active fault or error codes

Confirm the inverter has started, is exporting, and displays no fault codes after the connection sequence.

Measured AC power output at commissioning

Informational: instantaneous AC output at the time of test. Compare to expected output for the present irradiance to confirm a healthy baseline.

Baseline production consistent with expected output for conditions

Fall protection used for all rooftop / elevated work

N/A for ground-mount systems.

Commissioning agent signature

System owner name

System owner email