TechnologySolar & Heat
Optimising Solar with a Heat Pump
Well-planned, PV + heat pump raises self-consumption to 60–70% and heats almost for free.
Key figures overview
60–70 %
Self-consumption with HP
+2–3 kWp
Recommended extra size
up to 80 %
Heating cost reduction
8–12 years
Payback (combined)
Why this combination?
Massively increased self-consumption
Heat pump 3,000–5,000 kWh/year. Self-consumption rises from ~30% to 60–70%.
Heating with solar power
In mild spring/autumn, heat pump runs entirely on solar electricity.
Smart home integration
EMS controls heat pump automatically based on solar production.
Combined subsidies possible
Some cantons combine heat pump subsidies with Pronovo PV remuneration.
Frequently asked questions
How large should PV be for a heat pump?
Add 2–3 kWp per household member. For 4 people: base 10 + 8 = 18 kWp.
Can heat pump serve as storage?
Yes – buffer tank heated to 60°C with surplus solar. More cost-effective than battery.
What heat pump funding exists?
Cantonal building programme (ProKilowatt, MuKEn 2014), independent of Pronovo. Varies by canton.
Solar + heat pump – calculate your potential
Calculate your solar potential including heat pump and storage integration.
Calculate subsidy