Households considering a heat pump often have another question: could rooftop solar panels make the system cheaper to run? The Gov Boiler Upgrade Scheme can help with the initial cost of an eligible heat pump, while solar photovoltaic (PV) panels can generate electricity that may power household appliances and part of the home's heating demand.

These are complementary technologies, but they work in different ways. The key is to understand what the grant covers, when solar electricity is available and how your overall energy tariff affects savings.

What Does the Government Grant Actually Cover?

The official scheme is called the Boiler Upgrade Scheme (BUS). It contributes towards eligible heat pumps or certain biomass boilers installed at qualifying properties in England and Wales.

In November 2026, standard grants include £7,500 for qualifying air-to-water or ground source heat pumps and £2,500 for eligible residential air-to-air systems. The installer deducts the grant from the qualifying heating installation price and applies to Ofgem on your behalf.

BUS is not a general grant for buying solar panels or batteries. If you are considering a combined project, request separate prices for the heat pump and the solar or storage equipment so you understand what BUS is supporting.

How Can Solar Panels Help a Heat Pump?

A heat pump uses electricity to move heat into the property. Solar PV panels generate electricity when daylight conditions allow. If solar production coincides with heating, hot-water or other household demand, some of that electricity may be used directly instead of importing it from the grid.

However, UK heating demand tends to be highest in colder, darker periods when solar output is lower. Installing solar panels does not mean the heat pump will run free all winter. The financial result depends on system size, roof orientation, energy use and the electricity tariff.

Should You Add a Home Battery?

A battery can store some surplus solar generation for later use, but it adds to the upfront price. It will not necessarily cover a heat pump's overnight or winter heating requirements.

Energy Saving Trust research suggests that combining low-carbon technologies with suitable tariffs can reduce household energy costs in some circumstances, but high purchase costs mean the combination does not always provide the strongest financial return. A written whole-home forecast is more useful than a headline saving percentage.

Does Existing Solar PV Affect Eligibility?

Having rooftop solar panels does not, by itself, mean that a property cannot qualify for BUS. The scheme's main eligibility questions concern the property, existing heating, proposed low-carbon technology and previous relevant public funding.

Your MCS-certified installer should review any earlier grants for heating equipment or energy improvements. Previous funding for insulation, for example, does not automatically prevent BUS eligibility, but you should declare relevant funding accurately.

What Should You Compare in the Quote?

Request separate explanations for the heat pump design, hot-water system, solar generation estimates and any battery proposal. Ask how the installer models winter consumption and whether a time-of-use electricity tariff might be beneficial.

Review export payment terms, battery warranties, maintenance and the cost of future replacements. Avoid claims based only on sunny summer days or a single assumed electricity price.

To understand how the Gov Boiler Upgrade Scheme works before evaluating a combined renewable-energy project, read Berks Insulation's guide and compare detailed quotes from qualified professionals.

Frequently Asked Questions

Will BUS pay for my solar panels?

No. BUS support is directed towards specified low-carbon heating installations, not a standalone solar PV purchase.

Can I keep my existing solar panels when installing a heat pump?

Usually yes, subject to the electrical installation and system design. Ask your installer to assess the setup.

Will solar panels eliminate my heat-pump electricity bill?

No. Heat-pump demand and solar generation do not match perfectly throughout the year, particularly in winter.

Final Thoughts

A heat pump and solar PV can work well together, but grant eligibility and bill savings are separate calculations. Start with a suitable heating design, then assess solar and battery options using realistic annual energy figures.