Maintenance of Solar PV Panels
With PV panels the most important bit of maintenance for the homeowner is to keep the panels clean. If there is a build up of dirt or residue on the panels it will affect the performance of the panels. In Ireland typically the rain will keep the panels relatively clean but especially during the summer months it is recommended to clean the panels. The most effective way to clean you PV panels is with a bucket of soapy water with a non-abrasive sponge. Much the same as you would clean your car. It is recommended every 3-5 years that you get your installer to call and do a check over connections etc of the whole system.
Luckily, most systems now have an app for the phone/laptop/tablet, so if you see the performance has dropped on your app you can call your installer or the manufacturer of the inverter who can run a diagnostic of the system remotely to check is everything working correctly.