Build Your Own Solar Batch Water Heater
The solar batch water heater is a fun project for the do-it yourselfer and provides an inexpensive hot water source for the back yard workshop or weekend cabin, It is easy to construct, costs only about $70 to build and produces water temperatures as high as 150 degrees F. Remember, the batch heater is not designed to oparate with pressurized water system and should not be connected to a city water supply. If you are looking for such a system, consider manufactured solar systems, which have been designed to meet strict standards and aesthetic considerations.
Florida Solar Energy Center and Public Information Office, "Build Your Own Solar Batch Water Heater" (1988). FSEC Energy Research Center®. 903.