This ASP Audit V3.0 template guides a comprehensive preventive maintenance audit of Solar PV installations. It covers roof access and safety, array cleanliness and orientation, meter operation and ratios, and G59 relay checks. Inspectors verify inverter identification, labeling, AC and DC isolators, data plate details, production readings, and fault logs. The DC side review includes module mounting, earth bonding, junction and combiner boxes, surge protection, and water tightness, with checks for overheating and terminal tightness. String testing captures voltages, IDs, and cable management. The audit wraps with issues found, rectifications, photos, and confirmation the array is safely returned to service.
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