Solar Water Heating Pays For Itself Five Times Over

http://www.sciencedaily.com/releases/2009/03/090309105021.htm

ScienceDaily (Mar. 13, 2009) — An analysis of the engineering and economics for a solar water-heating system shows it to have a payback period of just two years, according to researchers in India. They report, in the International Journal of Global Energy Issues, on the success of the 1000-liter system operating at a university hostel.