In the event that the sun cannot provide enough energy to heat the water for a long period of time, the boiler can be automatically reheated using the optional 230V reheating device. To activate after-heating, a minimum temperature can be set on the boiler. This could be 35°C, for example. As soon as the temperature of the water falls below the set minimum temperature, the water is reheated using electricity from the network. During the post-heating phase, existing photovoltaic energy is also converted into heat. The reheating process ends automatically as soon as the water has reached the set minimum temperature again. (The post-heater is not included.)
The maximum water temperature of the boiler is 65°C. When the boiler is completely heated, about 72 liters of 34-degree water can be drawn from it. As a rule of thumb, around 30 liters of hot water are available every day. Either only by the power of the sun or with the support of the optional 230V after-heating device.