Because they have no moving parts, solar panels are practically maintenance-free. The only thing you'll need to do is keep them clean, which should be done once or twice a year after the pollen season has ended. All you need is water and a mop or rag. Don't power wash your system, and you should never use soap or any abrasive sponges. You also don't want to clean them when they're hot, because uneven thermal shock could break the glass. It's better to wash them in the morning or in the evening. But if you don't have the ability or the desire to get on the roof to clean your panels, you can always hire a solar cleaning business to do it for you.