The three things “no upfront cost” can mean
Every £0 upfront solar offer is one of three arrangements. They look alike on the day of installation and nothing alike ten years later.
| Grant | Loan or subscription | Roof lease | |
|---|---|---|---|
| Who pays for the panels | A government or council scheme | You, monthly, over the term | The company, which keeps the panels |
| Who owns them | You | You, from day one or at the end of the term, depending on the contract | The company, for the length of the lease |
| Who gets the export income | You | Usually you; check | Usually the company |
| How long it runs | Once | Typically ten to twenty-five years | Typically twenty years or more |
| Who it is for | Lower-income households that qualify | Owner-occupiers who pass a credit check | Owner-occupiers prepared to lease the roof |
| What to read first | The scheme’s rules | The total repayable and the APR | The lease, and what it does to a sale |
Route 1: grants that pay for the panels
No scheme pays for solar for every home. Three can pay for it for households that qualify:
- Warm Homes: Local Grant in England, for lower-income households in homes rated EPC D to G, through councils that have funding. GOV.UK’s guidance sets out the benefit, income and postcode routes. Solar is one of the measures a council can fund, not a guarantee.
- ECO4 in England, Wales and Scotland, for households on qualifying benefits or council Flex, until 31 December 2026. Solar can be included alongside insulation and heating.
- Nest in Wales, which offers free improvements after a home assessment to owner-occupiers and private tenants on benefits or a low income.
Our solar panel grants guide covers each scheme, nation by nation, and who is most likely to qualify.
Route 2: paying monthly
For most households, £0 upfront means a finance agreement or a subscription. The panels go on without a lump sum, and you pay a fixed amount each month for a term that can run from a few years to twenty-five.
These can be perfectly reasonable products. What matters is reading them as the loans they are:
- The total repayable. Multiply the monthly payment by the number of months. Compare that, not the monthly figure, with the price of buying the same system outright.
- The APR, and whether part of each payment is a service or monitoring fee rather than loan repayment.
- Ownership. Some agreements make the system yours from day one; some transfer it at the end; some never do. The contract says which.
- Early repayment. Whether you can pay it off early without a penalty.
- Moving house. Whether the balance has to be cleared from the sale, or the agreement can transfer to a buyer who passes the same checks.
- Maintenance and guarantees. What is included in the monthly payment, what the panel and battery guarantees promise, and what happens if the provider stops trading.
- Export income. Under the Smart Export Guarantee, larger suppliers must pay for exported electricity and each sets its own rate and terms. Check the agreement leaves that income with you.
Installed solar panels and batteries in homes have 0% VAT until 31 March 2027, however they are paid for. Warm Home Support does not offer or arrange finance, and does not name providers, because no supplier relationship is confirmed.
Route 3: roof leases
The older “free solar” model is a roof lease: a company fits and owns the panels, gives you some or all of the electricity, and keeps the export income for twenty years or more. There is nothing to pay, but there is a lease on your roof that outlasts most mortgages and that a buyer’s solicitor will ask about.
If you are offered one, read the lease for what happens when you sell, who repairs the roof under the panels, who is responsible for the panels, and what it costs to end the arrangement early. Our solar panel grants guide has a section on being careful with free solar offers.
Warm Homes Plan loans
The government’s Warm Homes Plan sets aside money for low and zero-interest loans for solar panels, batteries and heat pumps, offered through lenders, with caps in the scheme rules of £15,000 for solar and £15,000 for a battery. GOV.UK had not named a participating lender when we checked. When one is named, this will be the £0 upfront route to compare the others against. Our Warm Homes Plan loans page tracks it.
Solar and a heat pump together
A heat pump raises the amount of electricity a home uses, and solar offsets part of it, mostly from spring to autumn. If you are planning both, have the roof surveyed on the same visit as the heat-loss survey, so the panels are sized against the heat pump’s expected use and the electrical work is done once.
The grant pays for the heat pump only. Our guide to an all-electric home sets out how the two fit together across a day and a year, and why “zero bills” is a sum rather than a promise.
Six questions before you sign
Ask these, and get the answers in writing
- Who owns the panels on day one, and at the end of the term?
- What is the total I will have paid by the end, and what is the APR?
- Who receives the export payments?
- What happens if I sell the house?
- What generation and savings does the estimate assume, and for which tariff?
- Is the installer MCS-certified, and is the provider regulated for credit?
“Free solar for everyone” is a warning sign
Grants are means-tested and limited. An offer of free panels to any household is either a finance product or a roof lease, and should say so. Cold calls, pressure to sign on the day and promises of zero bills are the usual shape of a bad deal. Our guide to energy grant scams lists the warning signs.
Check your property
Pick the grant you want to check. Three quick checks, then our team calls you back. It is free, with no obligation.
