Introduction
Preventive maintenance of your PV combiner box ensures long-term efficiency, safety, and system reliability. Here’s a detailed maintenance checklist.
Daily Maintenance (Visual Checks)
No visual damage or burn marks
LED indicators for SPD are green
Box is sealed and not overheated
Monthly Maintenance
Check all terminal tightness with torque tools
Clean dust and debris inside and outside
Inspect enclosure for rust, corrosion
Quarterly Maintenance
Test voltage and current at each string
Check SPD and breakers with a multimeter
Verify insulation resistance
Annual Maintenance
Perform IR thermal imaging scan
Calibrate monitoring devices
Clean busbars and contact points with isopropyl alcohol
Check labeling and signage for readability
Tools Needed
Multimeter
Torque screwdriver
Thermal camera
Insulation resistance tester
Documentation
Keep detailed logs of each inspection
Record any anomalies or component replacements
Conclusion
A well-maintained PV combiner box ensures optimal performance and minimizes downtime. Use this checklist to standardize and streamline your maintenance process.
