Roof - O&M Inspection Checklist

Title Page

Inspection Items

Preventative Testing & Maintenance (DC Components)

Verify system signage is in place
Confirm electrical enclosures and combiner boxes/string inverter as secure, weather protected, and free of corrosion
Inspect for corrosion on racking system and panels
Ensure no hanging or suspended cabling outside wire management systems and perform wire maintenance if needed
Cleanliness of solar panels
Verify no broken, damaged, or distorted panels
Replace broken, damaged, or distorted panels
Document panel by INV/String
Verify panel connection to racking system
Check and tighten connections between strings and inverters
Ensure weather station sensors are in appropriate location and functioning (if applicable)
Adjust or calibrate units as required by manufacturer
Clean sensors from accumulated soiling
Inspect heat sinks, clean filters, etc. on inverter enclosures and combiner boxes
Check fuses throughout system
Check continuity of system grounding and equipment grounding

Inspection of physical / mechanical condition and evidence of overheating
Inspection of anchorage, alignment, and grounding
Cleaning of applicable components
Verification of alarm, control, and trip circuits from temperature and level indicators, gas pressures, and pressure relief devices
Inspect bolted electrical connections
Verification of fuse size and types, along with contact integrity
Appropriate lubrication of moving current carrying parts and on moving and sliding surface

Inspection of physical / mechanical condition and evidence of overheating
Inspection of anchorage, alignment, and grounding
Performance of as-found tests
Cleaning of applicable components
Verification of alarm, control, and trip circuits
Download all events from the event recorders in filtered and unfiltered modes and upload in report
Verify operation of light emitting diodes, displays, and targets
Record password access for all levels
Inspect bolted electrical connections
Verification of correct blade alignment, blade penetration, travel stops, and mechanical operation for air switches
Verification of fuse size and types, along with contact integrity
Appropriate lubrication of moving current carrying parts and on moving and sliding surfaces

Inspection of physical / mechanical condition
Inspection of anchorage, alignment, and grounding
Performance of as-found tests
Cleaning of bushings and control cabinets
Verification of alarm, control and trip circuits from temperature and level indicators, pressure relief devices
Inspect bolted electrical connections
Verification of correct level of liquid in tanks and bushings

Inspection of physical / mechanical condition and evidence of overheating on visible portion of cables
Performance of as-found tests
Inspect bolted electrical connections

Monitoring system maintenance in accordance with manufacturers specifications
Verify orientation and attachment of pyranometers and module temperature sensors and MET station and verify back up power supply functionality
Repair equipment enclosures as necessary
Performance of as-found tests
Clean pyranometer domes with a soft cloth

GHI and POA pyranometers
Ambient temperature
Back-of-module
Anemometer
Revenue Grade Meter (including current transducers)
Inverter direct
Verify that back-of-module temperature sensors are correctly installed and are in good thermal contact with modules
Repair as necessary

Conduct IV testing and record results
Conduct aerial thermal audits and upload results
Conduct thermal imaging of overcurrent protection devices and bolted electrical connections including terminations in combiners and all disconnects, inverters, and transformers in accordance with OEM recommendations/requirements

Facility Security
Landscaping
Stormwater Facilities
Lighting
Other support structures
Verification of Spare Parts Inventory readiness and confirmation of expiration date of perishable items
List spare parts and equipment in inventory