Solar Energy, Photovoltaics, and Domestic Hot Water : A Technical and Economic Guide for Project Planners, Builders, and Property Owners.. ..

"The direct use of solar energy has never been adopted on a worldwide scale since there have always been cheaper alternative energy sources available. It really wasn't that these sources were cheaper than the sun's energy which, after all, is free, but rather the costs of constructing devices or systems to use the sun's energy were greater than the