He also shares a strong desire to see the price of solar water heating systems come down dramatically. (builditsolar.com)
The study covered just seven different types of water heating systems (two types of solar systems), but it does include a fairly comprehensive economic analysis of each system. (peakoil.net)
Any solar electric power installation or solar water heating system makes you eligible for the credit, so long as installation begins by that date. (solar-estimate.org)