Solar Panels and Air Source Heat Pumps: The Complete Guide
As more UK homeowners install air source heat pumps under the Boiler Upgrade Scheme, the natural question arises: does solar work well with a heat pump? The short answer is yes — but the interaction is more nuanced than many simplified guides suggest. Here is an honest assessment based on real North East installations.
Why Solar and Heat Pumps Work Together
An air source heat pump runs on electricity rather than gas. A heat pump serving a typical UK home consumes 3,000–5,000 kWh of electricity per year — roughly doubling most households' electricity usage. Installing solar panels alongside a heat pump offsets a significant portion of that increased electricity demand, dramatically improving the financial case for both technologies.
The seasonality alignment is imperfect but workable: solar generates most in summer when heating demand is lowest, and least in winter when heating demand peaks. However, spring and autumn — when heat pump usage is moderate and solar generation is meaningful — provide substantial overlap.
Sizing Solar for a Heat Pump
For a household adding a heat pump (or already having one), we typically recommend a minimum 6kW solar system rather than the 4kW systems that suit most homes without heat pumps. The additional generation capacity better offsets winter heating bills and provides meaningful surplus for battery charging through the heating season. A 6kW system in the North East generates approximately 5,100–5,700 kWh per year — covering a significant portion of a heat pump's annual consumption.
Battery Storage With Heat Pump and Solar
Battery storage becomes even more valuable when you have both solar and a heat pump. In summer, the battery stores excess solar generation for evening use. In winter, it stores cheap overnight electricity (on Octopus Go at 7.5p/kWh) to power the heat pump during daytime running. Some advanced battery systems (Sigenergy, GivEnergy with smart scheduling) can pre-heat your hot water cylinder during cheap tariff windows, reducing demand on the heat pump during expensive peak periods.
The Boiler Upgrade Scheme
The Boiler Upgrade Scheme (BUS) provides a £7,500 grant towards the cost of an air source heat pump. This is separate from solar incentives — you can claim both the BUS grant for your heat pump and the 0% VAT benefit on your solar installation. Solar panel installation is not eligible for BUS funding, but the two are complementary in the same property.
Will Solar Power a Heat Pump in Winter?
On a clear winter day in the North East, a 6kW system might generate 5–15 kWh — enough to cover a heat pump running for several hours. Over a winter month, a 6kW system in the North East generates approximately 200–400 kWh — useful, but typically covering only 20–40% of winter heat pump consumption. Battery storage helps by time-shifting cheap overnight electricity and the solar generation that is available. The heat pump + solar + battery combination is genuinely the most powerful home energy package available in 2026.
Getting a Combined Solar and Heat Pump Assessment
While ALPS Electrical specialises in solar panels, battery storage and EV chargers rather than heat pump installation, we regularly work alongside heat pump installers to ensure the electrical infrastructure — including the consumer unit, cable routing and solar system sizing — is correctly specified for the combined system. Contact us for a solar assessment for your heat pump property.