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As a Renewable Energy and Sustainability Research Center, we survive on donations for purchasing products, parts, test gear, and publications, to bring you the latest info and services for free. On the right column you can find a donation button if you would like to participate in bringing this information to the world. You can also shop Amazon, with part of the proceeds going towards our funding, at our Amazon Store. We appreciate your interest and support in furthering clean energy and self sufficient living research being disseminated to all & any who want to learn.