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Low-Energy Buildings: Solar Thermal, PV or Heat Pump?

Submitted by Baerbel Epp on September 1, 2017
Woche der SonneWhat is the best way to supply heat and power to low-energy buildings? Although there is no single answer to this question, solarthermalworld.org simulated the installation of a solar thermal unit, a PV system, a heat pump and a gas boiler in a low-energy house in southern Germany. The results show that solar technologies are significantly more profitable than heat pump systems. The largest solar field – consisting of 10 m² each of PV and solar thermal combined with a gas boiler – has by far the lowest cost (EUR 35,876) over 20 years in operation. 
 

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