Solar arrays fail quietly — a loose clamp, a weathered connector, a string running a few percent low. Small habits catch these years before they become outages.
Trend the strings, not just the total
Total yield hides problems; string comparison exposes them. Review per-string curves monthly — a string that lags its siblings on clear days is naming a connector, a shadow or a failing device. Investigate at 5 percent, not at failure.
Walk the array with a torque wrench and a camera
Once a year, sample clamp torques, photograph connector pairs, and look under modules for cable rub. A thermal camera on a sunny day finds hot connectors and bypassed cell groups in minutes — heat today is downtime next winter.
Keep vegetation and drainage on the schedule
Ground arrays lose more to grass shadows and blocked drainage than to any electrical fault. Mow to the plan, check that water leaves the field the way the design assumed, and the structure will meet its warranty years without drama.
Log everything against serial numbers
A maintenance log tied to serial numbers turns anecdotes into evidence: which lot of connectors weathered early, which inverter fan ran hot. Evidence wins warranty conversations; memory does not.
