Solar Panel Grants UK 2026: What Is Available and Who Qualifies

The phrase "free solar panels" appears often online, but it is worth being precise about what is actually available. Most UK homeowners will not receive a fully funded installation. What does exist is a combination of a permanent tax relief, two income-linked grant schemes, and an ongoing income stream from exported electricity. Together, these can substantially change the financial picture.

1. Zero Percent VAT on Residential Solar

Since April 2022, residential solar panel installations in Great Britain have been charged at 0% VAT rather than the standard 20%. The zero rate applies to the full cost of supply and installation, but it is a time limited relief: it is currently scheduled to end on 31 March 2027, when the rate is due to return to 5% unless the government extends it. Northern Ireland has a separate VAT regime and the relief is structured differently there.

On a typical 4kW system costing £8,000 before VAT, the old 5% reduced rate would have added £400 to the bill. At 20%, that would have been £1,600. At 0%, there is nothing to add. It is a straightforward saving built into every installation quote you receive from a UK installer, so you benefit automatically without applying for anything.

2. ECO4 Scheme

The Energy Company Obligation (ECO4) is a government-mandated scheme that requires large energy suppliers to fund energy efficiency improvements for lower-income households. Solar panels are one of the eligible measures. For households that qualify, the grant can cover the full cost of installation.

Eligibility is primarily income and benefit-based. To qualify, you typically need to receive one of the following: Universal Credit, Pension Credit, Child Tax Credit, Working Tax Credit, Income-related Employment and Support Allowance, Income-based Jobseeker’s Allowance, or Income Support. Owner-occupiers and private tenants can apply, though landlord consent is required for rented properties.

There is also an LA Flex strand of ECO4, where local authorities can refer households that do not meet the benefit criteria but are considered vulnerable due to low income or poor energy efficiency. The availability of LA Flex varies by area and is at the discretion of local councils.

3. The Warm Homes Plan

The Warm Homes Plan was announced by the government as the successor to ECO4, with a stated commitment of approximately £13.2 billion over the period from 2025 to 2028. The scheme is intended to fund insulation, heat pumps, and low-carbon heating for lower-income and fuel-poor households. Solar panels are expected to be an eligible measure under the plan.

The Warm Homes Plan is being phased in progressively. Eligibility criteria, application routes, and participating installers are being confirmed on a rolling basis. The best source of current information is the official gov.uk guidance, or contacting your energy supplier directly, as the scheme is partly administered through energy companies as ECO4 was.

4. Smart Export Guarantee

The Smart Export Guarantee (SEG) is not a grant but it is a meaningful source of ongoing income from your solar installation. Under the SEG, energy suppliers with more than 150,000 customers are legally required to offer a tariff that pays you for every unit of electricity you export to the grid. The rate is set by the supplier rather than the government, and currently ranges from approximately 4p to 15p per kWh depending on the tariff and supplier.

To benefit from SEG, your installation must be carried out by an MCS-certified installer and use MCS-certified equipment. Once registered, you apply to your chosen SEG licensee and receive payments, typically quarterly, based on metered or estimated export volumes. The income is modest compared to self-consumed electricity savings, but it adds up over the life of a system.

For a fuller explanation of the certification requirements, see our guide on what MCS certification means and why it matters.

What "Free Solar Panels" Actually Means

Some companies advertise "free solar panels" or "no-cost solar". These offers generally fall into a few categories. The first is a genuinely grant-funded installation under ECO4 or the Warm Homes Plan for eligible households. The second is a solar lease or power purchase agreement (PPA), where a third party installs panels on your roof and charges you a monthly fee or sells you the electricity at a discounted rate. You do not own the panels. The third is a marketing headline that does not survive close reading.

If someone tells you that you qualify for free solar panels without first checking your benefit status or income, ask them to be specific about which scheme they are referring to. Legitimate installers will always be clear about what is grant-funded and what you will need to contribute.

Combining Schemes and Savings

For homeowners who do not qualify for ECO4 or the Warm Homes Plan, the 0% VAT rate and SEG income still improve the financial case for self-funded solar. Read our article on how much solar panels save for a typical UK household to understand the full picture of savings and payback periods.

Before any of this, it helps to know whether your roof is suitable. Check which way your roof faces with our free tool to get an instant orientation and estimated solar potential for your property.