UK Solar Grants and VAT Relief in 2026: The Schemes Actually Worth Knowing About

The UK solar market has been relatively stable on the incentives side for the past two years, but there is still a meaningful stack of financial support available — provided you know where to look and are realistic about what each scheme actually delivers.

Zero-rated VAT on solar installations

The most broadly applicable benefit is the 0% VAT rate on residential solar panel installations, battery storage, and EV chargers. This has been in place since April 2022 and was made permanent in the Spring 2023 Budget, removing the earlier sunset clause that had made some installers hesitant to quote it as a long-term saving.

In practice, this is worth somewhere between £1,500 and £3,000 on a typical 4kWp system, depending on the total install cost. It is not a grant — you do not apply for it — but it does lower the sticker price compared to what you would have paid before 2022. Every reputable installer will apply it automatically.

The Smart Export Guarantee

The Smart Export Guarantee (SEG) obliges larger energy suppliers to pay you for surplus electricity you export to the grid. Unlike its predecessor (the Feed-in Tariff), the SEG does not set minimum rates — suppliers set their own. In practice, rates have ranged from around 1p to 15p per kWh depending on the supplier and tariff type, with some time-of-use export tariffs paying significantly more during peak evening hours.

The income from SEG is real but easy to overestimate. A typical 4kWp system in the UK exports roughly 40–50% of its generation if you have no battery, and considerably less if you do. At 5p/kWh exported, that works out to around £150–£200 per year. Worth having; not the primary reason to install.

ECO4 and the Great British Insulation Scheme

ECO4 (Energy Company Obligation) is a government scheme requiring large energy suppliers to fund energy efficiency improvements for eligible households — primarily low-income or those in properties with poor energy ratings. Solar panels are in scope under ECO4, but in practice most of the budget goes to insulation and heat pumps. Your eligibility depends on your household income and your property's EPC rating.

The Great British Insulation Scheme (GBIS) runs alongside ECO4 and targets properties in the lower half of EPC bands. Again, primarily insulation, but it is worth checking whether your property qualifies — improving your EPC rating before a solar install can affect your mortgage options and resale value.

The Boiler Upgrade Scheme (if you are also considering heat pumps)

The BUS offers £7,500 off the cost of an air source heat pump (ASHP) installation. This is not directly a solar grant, but it is relevant if you are planning a full low-carbon retrofit: solar panels, battery storage, and a heat pump together change the economics of each significantly. The heat pump increases your daytime consumption and reduces your reliance on the grid during winter, which improves solar self-consumption figures and battery utilisation.

What is not available in 2026

The original Feed-in Tariff closed to new applicants in April 2019 and cannot be accessed by new installs. There is no universal solar grant for middle-income households — the government's current approach is VAT relief rather than direct subsidy. If a company is advertising a "government grant" for solar without specifying which scheme, ask them to name it explicitly before signing anything.

The net result: UK solar installs in 2026 benefit from genuinely lower post-tax costs and a guaranteed export income stream. They do not benefit from the kind of direct subsidy that drove the market in 2010–2015. The maths still works — but it works because of lower equipment costs and higher grid tariffs, not because of grants.