If you know that you cannot reach your solar panels to clean them, the best thing to do would be to hire a professional to clean it for you. if you are not sure of who to call, you should ask the company that came and installed the panels for you.
If you are interested in joining the green movement and helping the Earth, harnessing power from the sun is the way to go. It's natural, it's clean and it's renewable, which means that you can't use it all up. Therefore, not only can solar power help you save money on your electricity bill, it is also good for the environment.
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