Switching controller for electro-solar water heater - inhibits actuation of electrical heater when solar heater is in operation, via single button operation

摘要

The controller is used to supply the water heater with electrical energy, and has a system which supplies the water heater using solar energy. A switch cuts off the electrical energy supply when the solar panel energy supply is working. A single control button operates these three devices. The same switch cuts off the electrical energy supply and starts the pump of the solar panel subsystem. In normal conditions, the water is heated by the solar panel subsystem during day-time and by the electrical subsystem, also controlled by a day-night switch, during the night-time. If needed, the electrical subsystem can be started during day-time using the single control button.