Energy efficient homes are tight and insulated. But what about efficient water heating, after all, aren’t a good portion of energy costs are focused there? There are two ways two go: direct solar heating or a solar-electric (photovoltaic or PV) system. Energy experts are advising more often that solar-electric may be the better option. You are able to obtain electricity through solar means and use the electricity to heat yoru water. You also have the advantage of a system with much lower maintenance. Before you buy, investigate the three types of solar electric systems; conventional storage-type electric water heater, a tankless water heater, and a heat-pump water heater.
Read the full article here: Deciding on a Water Heater | GreenBuildingAdvisor.com