Solar panel grants in the UK are more varied in 2026 than at any point since the original Feed-in Tariff closed. Several government programmes — national, devolved, and local — can reduce or eliminate the upfront cost of a solar installation. Knowing which scheme you qualify for, and how to navigate the application process, can be the difference between paying full price and getting your panels for free. This guide covers every live funding route as of August 2026.
ECO4: Free Solar Panels for Eligible Households
The Energy Company Obligation (ECO4) is the UK government’s flagship scheme for improving energy efficiency in low-income and vulnerable households. Unlike earlier ECO rounds, ECO4 takes a “whole-house” approach — meaning solar panels can be funded as part of a wider package of measures rather than as a standalone upgrade.
Who qualifies for ECO4?
To be eligible, your household must receive at least one qualifying benefit — such as Universal Credit, Pension Credit, Housing Benefit, or Child Tax Credit — and your home must have an Energy Performance Certificate (EPC) rating of D, E, F, or G. Higher-rated homes (A–C) are generally excluded. Ofgem regulates and oversees ECO4, and delivery is handled through the major energy suppliers (British Gas, EDF, E.ON, Octopus, and others).
How to apply for ECO4
- Check eligibility via your energy supplier’s website or a registered ECO4 broker
- Request a survey — a Trustmark-registered assessor will visit your home
- If approved, the supplier arranges and funds the installation through an MCS-certified installer
- You do not pay anything upfront or repay later — it is a grant, not a loan
ECO4 runs until March 2026 under its current framework, with a successor scheme — provisionally called ECO5 — expected to follow. If you think you qualify, apply as soon as possible. Our guide to finding an MCS-certified installer explains what to look for in any contractor working under a government scheme.
Great British Insulation Scheme: A Parallel Route
The Great British Insulation Scheme (GBIS) focuses primarily on insulation measures (loft, cavity wall, solid wall), but it is worth understanding alongside ECO4 because the two schemes can be used together. A household that gets free insulation under GBIS may subsequently qualify for solar under ECO4, significantly improving the home’s EPC rating journey. GBIS has slightly broader eligibility than ECO4 — it includes homes in council tax bands A–D that have an EPC of D or below, regardless of benefit status. Check the GBIS official guidance on gov.uk for current eligibility rules.
0% VAT on Solar Panels: A Saving Worth £1,000+
Since April 2022, all residential solar panel installations in Great Britain have attracted 0% VAT, down from the previous 5% rate. This applies to panels, inverters, battery storage installed at the same time, and associated labour. On an average 4 kWp system costing around £7,000, zeroing out VAT saves approximately £350 compared to the old 5% rate — or £1,400 compared to the standard 20% commercial rate. Northern Ireland operates under different VAT rules due to the Windsor Framework, so speak to your installer for clarity if you are based there.
The 0% rate is not means-tested and requires no application — your installer simply charges it automatically. It is one of the most universally accessible forms of solar financial support in the UK. The Energy Saving Trust confirms the current VAT position on solar and provides up-to-date guidance on what is covered.
Local Authority Grants and Flex Schemes
Under the ECO4 Flex mechanism, local authorities in England can expand ECO4 eligibility to households that do not receive qualifying benefits but are nonetheless in fuel poverty or on low incomes. Councils set their own criteria — typically based on household income thresholds or local fuel poverty indices — and issue declarations that unlock access to ECO4 funding.
In practice, this means a homeowner who does not receive Universal Credit may still qualify for free or heavily subsidised solar panels if their local council has an active ECO Flex scheme. The process varies by council: some run self-referral portals, others require you to contact your local authority housing or environmental health team directly.
Beyond ECO Flex, a number of local authorities run standalone retrofit grant programmes funded by the UK Shared Prosperity Fund (UKSPF) or Levelling Up money. Notable examples in 2025–26 include programmes in Wales (Nest scheme), Scotland (Warmer Homes Scotland), and several English metropolitan councils. Availability changes regularly, so searching “[your council name] solar grant 2026” is the most reliable way to find live local schemes.
Scotland: Warmer Homes Scotland
Scotland’s Warmer Homes Scotland programme offers free energy efficiency improvements — including solar where appropriate — to households receiving qualifying benefits, with no upper income limit for those aged 75 or over. Apply through Home Energy Scotland.
Wales: Nest and Optimised Retrofit
The Welsh Government’s Nest scheme provides free home energy improvements for low-income households, while the Optimised Retrofit programme targets social housing. Private homeowners in Wales may also access ECO4 through the same routes as England.
Boiler Upgrade Scheme: How It Interacts with Solar
The Boiler Upgrade Scheme (BUS) provides grants of £7,500 for air source heat pumps and £7,500 for ground source heat pumps. It is not a solar grant — but it interacts with solar in an important way. A household that installs solar alongside a heat pump gets substantially more benefit from both: the solar panels cut the electricity bill of the heat pump, making the combined system far more cost-effective than either alone.
You cannot use BUS to fund solar panels directly, but there is nothing stopping you from applying for BUS for your heat pump and funding solar separately (including via the 0% VAT saving). Some installers offer combined solar-plus-heat-pump packages; ensure the contractor is MCS-certified for both technologies, as BUS requires MCS certification for heat pump installations. Use our home battery storage guide to understand how adding a battery to a solar-and-heat-pump setup can further maximise self-sufficiency.
Smart Export Guarantee: Ongoing Income, Not a Grant
The Smart Export Guarantee (SEG) is not a grant but is a key part of the financial picture. Under SEG, energy suppliers with more than 150,000 customers must offer a tariff that pays you for every unit of surplus electricity you export to the grid. Rates in 2026 range from around 4p to over 20p per kWh depending on the tariff and supplier. Over a system’s 25-year life, SEG income can add thousands of pounds to your return. See our Smart Export Guarantee guide for a full comparison of current rates and the best tariffs to apply for.
Grants vs Loans: Green Finance Options
Not everyone qualifies for a grant. For those who do not, several green finance options exist:
- 0% green loans: Some energy suppliers and banks offer interest-free or low-interest loans specifically for renewable energy improvements. Check your bank’s green product range and compare with specialist providers such as Ecology Building Society.
- Solar as a service / Power Purchase Agreements (PPAs): A company installs panels on your roof at no upfront cost and sells you the electricity at a reduced rate. You do not own the panels, which complicates property sales, but it removes the capital barrier entirely.
- 0% VAT finance: Several solar installers offer in-house finance packages that spread the cost over 3–10 years with no interest. Always compare the total cost of credit against paying upfront.
Summary: Which Scheme Is Right for You?
| Scheme | Who qualifies | Benefit | Application route |
|---|---|---|---|
| ECO4 | Benefit recipients, EPC D–G | Free installation | Energy supplier or ECO broker |
| ECO4 Flex | Low-income (council assessed) | Free or subsidised install | Local council |
| GBIS | EPC D or below, bands A–D | Free insulation (can pair with ECO4) | Energy supplier |
| 0% VAT | All UK residential | ~£350–£1,400 saving | Automatic via installer |
| Boiler Upgrade Scheme | Replacing fossil fuel boiler | £7,500 heat pump grant | Via MCS-certified installer |
| Warmer Homes Scotland | Scottish residents on benefits | Free improvements incl. solar | Home Energy Scotland |
| Nest Wales | Welsh low-income households | Free improvements | Nest Wales helpline |
If you are unsure where to start, use our solar savings calculator to get a rough sense of your system size and potential savings — then contact your energy supplier and local council to check your eligibility for ECO4 and ECO Flex schemes. Always use an MCS-certified installer regardless of which funding route you take: it is a requirement for most grant schemes and the best protection against poor-quality work.