Combined collector

From left to right: solar collector, photovoltaic and both in one. The combined colletor has a so good thermal efficiency, that hot water can be produced without heat pump.



 Combined collector From left to right: solar collector, photovoltaic and both in one. The combined colletor has a so good thermal efficiency, that hot water can be produced without heat pump.

Other photovoltaic heat combinations produce only warmth at a low temperature level, where a heat pump brings it up to 50 degree Celsius.