Hot water even on the darkest days with very little sunlight. The 12V power supply unit reheats the water if there is not enough photovoltaic power available.

If the water temperature of the boiler falls below the set minimum temperature, the power supply unit is automatically switched on by the boiler. As a result, the water is heated using electricity from the socket.

Setting the minimum temperature
With the buttons on the boilers, a minimum temperature can be set within a very short time. This minimum temperature can be freely configured between 5°C and 65°C in 5°C steps. For example, a minimum water temperature of 35°C can be set. If the water temperature falls below the set minimum temperature, the mains unit is automatically switched on by the boiler. The water is heated via mains current.
As soon as the set minimum temperature is reached, the reheating process is automatically stopped again.

PV electricity always has priority
The photovoltaic boiler always uses as much photovoltaic electricity as possible.
If the water temperature falls below the set minimum temperature while electricity is being generated by the photovoltaic modules, then all the photovoltaic electricity is always used first. If not enough electricity is available from the photovoltaic modules while the water temperature is below the minimum, electricity is drawn from the grid in parallel.

Example:
The photovoltaic modules connected to the boiler currently supply 40W of power. At the same time, a mains unit with 62W output is connected to the 10-liter boiler. The current water temperature is 25°C. The set minimum temperature is set to 35°C.
As the minimum temperature is lower than the current water temperature, the reheating is activated. The mains unit is automatically switched on by the boiler. The power supply unit will heat the water in the boiler with a power of 22W, as an additional 40W from the photovoltaic modules is used.
As soon as the power of the photovoltaic modules exceeds the power of the power supply unit, the power supply unit is deactivated.