The government confirmed this week that up to £12,000 per household will be available for solar panel installations – but only for a fraction of the homes that need it. The scheme, part of the Warm Homes Plan, targets properties with the lowest energy efficiency: those rated EPC D, E, F, or G. For the typical 3-bed semi in that bracket, the grant could cover most or all of a standard 4 kW system, which costs around £7,000 to £9,000 installed. The catch is that the pot is capped at £1.2 billion over five years – enough for roughly 100,000 homes, against an estimated 5 million that qualify.
As reported by The i Paper, the grants are part of a wider push to install 600,000 solar panels on UK homes by 2030. But the numbers don’t add up neatly. The government’s own impact assessment suggests the scheme will lift only 1 in 50 eligible homes to a higher EPC band.
Who qualifies – and who doesn’t
Eligibility is tightly drawn. You must be an owner-occupier – no landlords, no tenants, no second-home owners. Your home must have an EPC rating of D or below, confirmed by a certificate issued within the last 10 years. The grant covers solar photovoltaic panels only, not battery storage or other low-carbon measures. If you already have solar panels, you cannot top them up with grant funding. The scheme also excludes homes built after 2010, on the assumption they already meet modern efficiency standards.
Ofgem, which will administer the grants, has not yet confirmed the exact application window, but officials have said it will open in early 2025. The Energy Saving Trust advises homeowners to get an up-to-date EPC assessment now, as the certificate must be current when you apply. The cost of an EPC is typically £60 to £120, and the surveyor will assess your loft insulation, wall type, heating system, and glazing – all of which affect the rating.
What it costs a typical 3-bed semi
A standard 4 kW solar system on a south-facing roof in southern England generates around 3,400 kWh per year – roughly 60% of a typical household’s electricity use. At current price cap rates of 24.5p per kWh, that saves about £830 annually on bills. The grant of up to £12,000 would cover the full installation cost for most homes, meaning payback is immediate. Without the grant, the same system would take 8 to 11 years to break even, depending on orientation and shading.
But the grant does not cover battery storage, which adds £2,000 to £5,000 to the system. Without a battery, you export excess power to the grid at the Smart Export Guarantee rate of around 15p per kWh – less than half the price you pay to import it. If you can afford the battery separately, your self-consumption rises from 30% to 70%, increasing annual savings to about £1,100.
How to prepare – and what to watch for
The scheme is likely to be oversubscribed within weeks. The government allocated £1.2 billion in total, but that covers solar panels, heat pumps, and insulation under the broader Warm Homes Plan. The solar-only portion is not separately ring-fenced. If you are serious about applying, act now: book an EPC assessment, check your roof orientation and shading with a free online tool, and get quotes from three MCS-certified installers. The grant will be paid directly to the installer, so you do not need to front the cash.
One risk: if your EPC is borderline D, the solar panels alone might not lift you to C. The Energy Saving Trust estimates that a 4 kW system adds only 5 to 10 points to the EPC score, depending on your current heating and insulation. If you are at 55 points (the top of band D), you will need additional measures – loft insulation, cavity wall fill, or a more efficient boiler – to cross the C threshold. The grant does not cover those, so factor in separate costs.
The scheme opens in early 2025. Households on standard variable tariffs can check their EPC status via gov.uk and should apply through the Ofgem portal as soon as it launches. Eligibility closes when the funds run out, which is expected within the first 12 months.
Frequently Asked Questions
The UK government offers up to £12,000 per household for solar panel installations through the Warm Homes Plan. You qualify if you're an owner-occupier with an EPC rating of D, E, F, or G, and your home was built before 2010. Landlords, tenants, and second-home owners are excluded.
The application window is expected to open in early 2025, administered by Ofgem. The exact date hasn't been confirmed yet. To prepare, get an up-to-date EPC certificate, which costs £60 to £120, as it must be current when you apply.
No, the grant covers solar photovoltaic panels only, not battery storage. Adding a battery costs an extra £2,000 to £5,000. Without a battery, you export excess power at the Smart Export Guarantee rate of around 15p per kWh, but with one, self-consumption rises from 30% to 70%, increasing annual savings to about £1,100.
A standard 4 kW solar system on a south-facing roof in southern England generates around 3,400 kWh per year, saving about £830 annually at the current price cap of 24.5p per kWh. With the grant covering the full installation cost, payback is immediate. Without the grant, payback takes 8 to 11 years.
The scheme is capped at £1.2 billion over five years, enough for roughly 100,000 homes out of an estimated 5 million that qualify. The government's impact assessment suggests only 1 in 50 eligible homes will be lifted to a higher EPC band. The scheme is likely to be oversubscribed within weeks of opening.
