Solar and Underfloor Heating

Can solar panels power underfloor heating?

Solar panels + underfloor heating (UFH) via a heat pump = the most efficient home heating system available: WHY IT WORKS: UFH operates at 35-45°C (low temperature). Heat pumps are most efficient at low temperatures (COP 4-5 at 35°C vs COP 2-3 at 55°C for radiators). Solar powers the heat pump — free heating. THE NUMBERS: Heat pump running cost with solar: £200-£400/yr (vs £800-£1,200 on gas boiler). Solar offset of heat pump electricity: 30-50% directly, 60-80% with battery. COST: UFH (retrofit): £3,000-£6,000. Heat pump: £3,500 after BUS grant. Solar (4-6kW): £5,500-£9,000. Total: £12,000-£18,500. SAVINGS vs gas: £600-£1,000/yr. Combined payback: 10-15 years.