The system itself
Do solar panels need maintenance?
The short answer
Mechanically, very little: there are no moving parts in a panel. What does need attention is the monitoring, because systems fail silently and most owners find out from a bill months later. Check production on a schedule, keep the array clear of debris and shade as trees grow, and expect the inverter to need replacing within the system's life.
What to actually do
- Look at the monitoring once a month on a clear day and confirm production is proportionate to the weather. This is the whole of the maintenance that matters.
- Watch the trees. A design drawn ten years ago assumed the shade of ten years ago.
- Keep gutters and the roof clear of debris that accumulates at the lower edge of the array.
- Have the array and the mounts inspected periodically, especially after severe weather.
- Budget for an inverter replacement. It is a normal event, not a failure of the purchase.
Cleaning is usually not the answer
In most places rain does most of the work and the recoverable gain from cleaning is modest. Where it genuinely pays is under trees, near the coast, on low-pitch arrays, and anywhere with bird activity or nearby agriculture or industry, because concentrated soiling costs disproportionately more output than uniform dust. Check the production history before buying a cleaning service.
Do not walk on the array, and do not use high pressure on panels. Both damage seals and coatings, and roof work is what the installer's insurance is for.
Also asked
How do I know if my solar system has stopped working?
From the monitoring, if you look at it. Systems fail silently and the most common way owners find out is an unexpected bill months later. A monthly habit of checking the app on a sunny afternoon is the single most valuable maintenance task there is.
General information about solar and about hiring, not advice about your roof or your tax affairs. Incentives, net metering and contractor licensing are set federally, by state, and by your utility, and all of them change. The authority that publishes the rule is the current answer.