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.
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One of the major benefits of solar energy is that it is renewable. The sun (generally) shines each and every day, and there is no reason to worry that drawing power from the sun will somehow render it unusable in the future. Using solar energy, therefore, is a safe and reliable way to power the Earth.