Package includes electric backup heater and solar water heater controller. Heater fits solar tanks of complete systems and controller is multi-functional, able to accept pressure and temperature inputs. Solar controller can turn on electrical heating to prevent freeze up and control pumps. Controller is available for purchase separate from heater.

Accepts North American and European voltages, functions in automatic and manual modes, protected against short-circuits, over-current and current leakage. See installation manual in downloads. A controller with a pressure sensor can automatically add water to be heated. The controller can be set for a fixed water temperature to be output, from 30°C to 80°C.  If the pipes from the solar collector to the point of use are long and cool down, an auto-circulate function can ensure that hot water is available immediately. Automatic leak detection and shutoff, a clock, and freeze protection in conjunction with the auxiliary heater are also available