Solar panels don't tend to need that much maintenance thanks to the fact that they have no moving parts - although they will require a clean now and then to ensure they're operating at their best, and will need to be professionally replaced if they become damaged.
A dirty solar panel is an inefficient one: dirty solar panels will produce less power than clean ones, which may even cost you money over time. Find out how - and how often - to clean your solar panels.
Problems with your solar panel? Find out how to tell if there's a problem, what sorts of issues are most common, and what kinds of steps you can take to get your solar panels repaired.