Solar is a simple, minimum-maintenance technology. Unlike other energy technologies, solar PV contains no moving parts. This means it’s not likely your equipment will fail. You should not have to replace your panels at all during their lifetime. Wiring is the part of solar PV that most commonly requires maintenance because squirrels and other animals may tamper with it. Depending on your inverter type, you may also need to have your inverter replaced 10 to 12 years after installation. Extended warranties can cover this equipment replacement cost. Ask your installer for details.
In most cases, solar panels do not need to be washed, as rain and snow naturally clean them. In areas with less rain and lots of dust or pollutants in the air, occasional cleaning may improve performance. We do not recommend climbing up to your panels to wash them. If you live in an area where cleaning is needed, contact a solar professional.
Even though solar is low maintenance, we recommend asking your installer or another qualified solar professional to inspect your array every 3 to 5 years to make sure things remain in good operating order. They’ll do a visual inspection of all equipment, check for things like wire damage from critters, and make sure your system is performing properly.