Always use non abrasive cleansers on your solar panels. An abrasive cleaner can scratch the surface of the panel and cause permanent damage and affect how well the solar panel works. There are commercial cleaning solutions to use or you can use a pool skimmer with a very soft cloth on it.
You can be free of the power grid when you generate your own solar power. You, yourself, can get it work, making your family more independent than your neighbors. In other words, you won't need to change electric services should you move, nor will you see high electric bills anymore.
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Carbon based pollution will be tremendously reduced when cars that are powered by the sun become widely available. But, there are other devices that work well on solar energy. Solar powered generators can be purchased, and are a great source of energy in emergencies.