Solar hot water heating systems are fairly simple to install, easy to maintain and the most cost effective way to introduce your home to solar energy. They can save considerable energy and cost when they replace an electric hot water heater. And they can be successfully used even if you live in a climate where freezing temperatures are common during the winter.
If you live in a climate that does not have sub-zero temperatures, and your household consists of fewer than five people, you can put in a batch heater. This is the least expensive solar water heating choice, and it is relatively easy to build if you have the inclination to do-it-yourself. It is simply a water storage tank that additionally serves as the solar collector.
The tank is enclosed in a glass-covered box that is positioned to allow greatest exposure to the
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