Solar panels do not have any moving parts, which is why there isn’t a whole lot of maintenance to take care of. However, cleaning is one aspect of solar panel maintenance that should not be taken lightly.
The first thing you want to do is to check with your solar panel manufacturer. They might have specific recommendations for cleaning.
Solar panels can become incredibly hot in sunshine. Either clean your solar panels in the morning/afternoon, or pick a relatively cool day.
Try using a garden hose first; that alone might handle the job. However, if a lot of dust and dirt has accumulated, you might need to give them a more thorough clean.
Fill a bucket or spray bottle with warm water and soap – no other special equipment is needed.
Clean the surface of the solar panel with a soft cloth or sponge. You do not have to clean the wiring underneath.
Show extra caution if cleaning your solar panels requires you to climb up on the roof. Consider getting professional solar panel cleaners to do the job if you’re not sure you can perform the task safely.