Rain, shine, or fog, solar panels still collect and convert energy from the Sun. In fact, solar panels are actually slightly more efficient on cooler days, producing even more energy.
Modern solar panel construction and installation are highly efficient and durable. As a result, they truly don’t require much maintenance.
The only time your solar panels might require a little attention from you is if they become dusty, dirty, or blocked by debris that has landed on your roof. In this case, they might need just a quick hosing down.