Solar lights really don't require much maintenance. As long as you check them for damage and clean the panels a few times a year, your lights can last 10 years without replacement. Deserts or high pollen areas may require more frequent cleaning of fixtures. A dirty solar panel covered in dust and debris can cost you 15% to 25% of your energy production costs. Fortunately, solar panels are easy to clean with a few tricks:
First, check with the manufacturer of your solar panel or fixture. They may have specific cleaning recommendations.
Solar panels get hot in direct sunlight, so try cleaning them on relatively cool days, whether it's early morning or late afternoon.
Often, a quick spray with a garden hose is enough to get the job done. However, if you have a lot of dust and dirt, fill a bucket or spray bottle with warm water and soap for a more thorough cleaning.
Don't use abrasives or detergent cleaners; you want to avoid scratching the glass.
Clean the surface of the solar panel with a soft cloth or sponge. You can use a soft scraper without having to clean the wiring underneath.
A good rain can clean your solar panels. However, this method works best when the panels are sloped like a roof.
If you do need to clean the panels on your roof, remember safety first and consider hiring a professional solar panel cleaner.
Additionally, solar panels installed near pollution sources such as highways, factories, and airports may require more frequent cleaning