A solar hot water system requires a hot water storage tank that keeps the water at a high temperature. In a two-tank system, water is heated with solar collectors and then stored in the first tank. A one-tank system has a single cylinder with twin coils.
Photovoltaic systems often produce more electricity than needed at the time. The sun shines during daytime hours rather than at night when electricity is needed. Fortunately, solar power can be stored in a solar battery that serves as an energy reservoir.
California has many progressive solar regulations, with the potential to create a promising future for the state's solar. Today there are a number of incentives available for those interested in taking the steps to adopt a solar energy system.