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.
Solar energy systems allow you to cut your ties to the outside world. You can go completely off grid with one of these systems. You will not have to pay monthly fees or wonder who is watching your power use. You can increase your level of privacy while saving the environment and your money.
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There is no need to hook your solar power system onto a power grid in your area. You have the ability to be independent from the power companies in your area. In other words, you won't need to change electric services should you move, nor will you see high electric bills anymore.