You mean take the heat that panels get under the sun and use it for water heating? It is a thing. There are so-called PVT (photovoltaic thermal) panels. They haven't quite taken off, as far as i know: a bit too complex to set up, a bit too expensive and do an average job both ways: the water is not as hot, and electric production is not as good.
When will they figure how to cool panels and use that heat for domestic heating or household hot water creation?
You mean take the heat that panels get under the sun and use it for water heating? It is a thing. There are so-called PVT (photovoltaic thermal) panels. They haven't quite taken off, as far as i know: a bit too complex to set up, a bit too expensive and do an average job both ways: the water is not as hot, and electric production is not as good.