Solar panels have no moving parts and do not require regular maintenance. Typically the recommendation is to hose off the panels once a year or so, but many panel owners actually never clean the panels and instead rely on the rain (or snow) to do the job for them. Typically this will cause only a very slight loss in efficiency over the lifetime of the panels. Of course, if any large debris falls onto the panels, it’s recommended you remove it. These days, solar systems come with monitoring software that allows you to spot any drops in power generation right away. Sunroof Solar Systems are linked into your monitoring system too, so sometimes they’ll even be aware of drops in a panel’s power output before you are. Pretty slick!