Combined modul photovoltaic solar collector Looks like a photovoltaic, delivers more electric power than a normal photovoltaic, because this modul delivers also heat at the same time and works so cooler.  

Combined modul photovoltaic solar collector

Looks like a photovoltaic, delivers more electric power than a normal photovoltaic, because this modul delivers also heat at the same time and works so cooler.

Sensless hot photovoltaic modules are a waste of energy.

The heat remains unused, the hot photovoltaic delivers less power