Solar funding in Wales

Funding for home solar in Wales comes from a handful of routes, yet most have strict rules. This guide explains which ones exist as of October 2026 and who can use them. It also names the English schemes that do not apply here.

Solar Cymru is an independent guide, not a lender or a government service. Therefore you should check current rules on the official page before you apply. We cannot promise any award.

Start with Warm Homes Nest

Warm Homes Nest is a Welsh Government scheme. It gives free, impartial energy advice and, for eligible homes, a package of free improvements. The package can include a heat pump, insulation and solar panels. However, solar is only one possible measure, and Nest never guarantees it.

Nest is demand-led, so its funding is a budget, not an entitlement. For example, the Welsh Government set aside £37 million for 2026-27, after a £5 million top-up in July 2026. Reach Nest through the official Welsh Government page, or check any contact details independently.

Who can get Nest improvements

You must own your home or rent it privately, because council and housing association tenants do not qualify. You must also receive a qualifying means-tested benefit or live in a low-income household. The benefits include Child Tax Credit, income-related Council Tax Reduction, Pension Credit and Universal Credit.

The home needs an EPC rating of E or lower. The limit is D or lower if someone in the household has an eligible health condition. D-rated homes without that condition go on a reserve list. A broad eligibility indicator is therefore not an award. Rules, budgets, household evidence and the suitability of your property decide the outcome.

If you do not qualify, Nest can point you to other schemes. Meanwhile, you can look at Green Homes Wales, which has no means test.

Green Homes Wales loans

Green Homes Wales is a Welsh Government scheme run by the Development Bank of Wales. It offers owner-occupiers interest-free loans of £1,000 to £25,000. You repay over up to 10 years, or longer for bigger projects, with a six-month repayment holiday. While the scheme also funds a retrofit assessment, only some measures get grant funding.

The loans can fund solar panels, or solar panels with a battery. The home must be in Wales, owned by you and your main residence. It cannot be a new build or a listed building, and private landlords cannot apply. Credit and affordability checks still apply.

You should take free general advice from Nest first, and the work must meet PAS 2035. Because the Development Bank of Wales issues loans in line with funding availability, do not assume money is waiting. Our post on solar panel costs in Wales helps you work out how much to borrow.

Schemes that do not help with solar in Wales

Several schemes sound relevant but do not fit. The Warm Homes: Local Grant is for England only. The Boiler Upgrade Scheme covers heat pumps and biomass boilers in England and Wales, not solar. In contrast, the Optimised Retrofit Programme funds councils and housing associations, so tenants of social landlords should ask their landlord.

ECO4 ends on 31 December 2026 with no successor. The Great British Insulation Scheme closed on 31 March 2026. We cannot confirm that ECO4 pays for solar panels.

The UK Government’s Warm Homes Plan mentions loans for solar and batteries. However, its launch date and its reach in Wales are not confirmed.

VAT and export payments

VAT on home solar installations in Great Britain is 0% until 31 March 2027. It is due to rise to 5% on 1 April 2027 unless the law changes. Batteries carry the same rate, since a battery fitted at the same time as panels gets the panel rate.

The Smart Export Guarantee pays you for power you send to the grid. Because suppliers set the rates, tariffs differ. Ofgem found an average near 4.4p per kWh on untied tariffs in 2024-25. Our post on the Smart Export Guarantee explains how to compare tariffs.

Heat pumps, businesses and farms

Solar can power a heat pump, which can lower electricity and heating costs. For example, an air source heat pump costs around £12,000 before grants, and the Boiler Upgrade Scheme grant is £7,500. Our post on solar panels and heat pumps in Wales looks at the pairing.

Businesses have their own routes. The Development Bank of Wales Green Business Loan Scheme lists solar PV as a typical eligible project. Meanwhile, Farming Connect offers renewable energy advice. Our page on commercial solar in Wales covers them.

Watch for “free solar” offers

Some sales pitches promise free panels, but the offer may have strings. Always ask who owns the panels, who gets the export payments and what you owe. A roof lease may need your mortgage lender’s consent, since most lenders require it for any lease. The Competition and Markets Authority publishes guidance on unfair commercial practices that applies to sales and marketing. Our post asking whether you can get free solar panels in Wales goes through the questions.

Next steps

Check Nest first if your household has a low income. Otherwise, compare Green Homes Wales with a bank loan or savings.

Read our page on solar panel installation in Wales to see what a quote should cover. Then use our get quotes page when you are ready. For local detail, see our page on solar installers around Swansea.