With a solar energy system, you can claim a 26% tax credit and deduct up to 80% of the system cost by depreciation. http://kultura-tonshaevo.ru/sostoyalis/1916-%D1%83-%D0%BA%D0%B0%D0%B6%D0%B4%D0%BE%D0%B3%D0%BE-%D0%B2-%D0%B4%D1%83%D1%88%D0%B5-%D1%81%D0%B2%D0%BE%D1%8F-%D1%80%D0%BE%D1%81%D1%81%D0%B8%D1%8F-%D0%BE%D1%82%D1%87%D1%91%D1%82%D0%BD%D1%8B%D0%B9-%D0%BA%D0%BE%D0%BD