Photovoltaic heating unit and solar-powered combined DHW storage tank

The assembly consists of the THERM ELF 9/2 heating unit and the THERM OKC 300 NTRR combined DHW storage tank with an additional, specially designed heating element. The connection of these two devices enables a sophisticated use of photovoltaic energy in combination with electricity from the grid for priority water heating, with the possibility of utilizing excess solar energy for heating, while minimizing investment costs. The system operates with direct current (DC) generated by photovoltaic panels, eliminating the need for a solar inverter and avoiding energy losses that occur during DC-to-AC conversion.