How does a solar water heater work ?
heater—also called solar domestic hot water system—can be a cheap
system to generate hot water for your home. They can be used in any
climate, and the fuel they use—sunshine—is free.
heating systems include storage tanks and solar collectors. There
are two types of solar water heating systems: active, which have
circulating pumps and controls, and passive, which don't. Solar
panels can’t be used to generate electricity, but heat up water.
They are often located on the roofs of buildings.