EPC ratings and solar funding
An energy performance certificate rates a home from A, the most efficient, to G, the least. Two of the routes that can pay for solar depend on it, and several others don't. Here is how to find yours and which schemes care about it.
The short answer
It matters for the means-tested schemes. Warm Homes: Local Grant in England needs an EPC rating of D to G. Warm Homes Nest in Wales uses E to G for its benefit route and D or lower for its health route. The Boiler Upgrade Scheme no longer needs an EPC, and the loan scheme and VAT relief don't use one.
Facts checked at source on 2 and 3 November 2026 · Solar PV Panels Grants is an independent explainer from SEO-DONS LTD, not a scheme
What an EPC is, and how to find yours
An EPC is produced by an accredited assessor who visits the home and records its construction, insulation, heating, hot water, lighting and any renewable technology. Software turns that into a rating from A to G and a score, along with recommendations for improvements. Certificates are needed when a home is built, sold or let, and each is valid for ten years.
Certificates for homes in England and Wales are held on a public register, and GOV.UK's "Find an energy certificate" service lets you search it by postcode. Scotland and Northern Ireland keep their own registers. If your home has been sold or let in the last ten years, there is a good chance a certificate exists.
The certificate shows the current rating and a potential rating if the recommendations were carried out. Solar panels often appear among the recommendations, which is part of why EPCs come up so often in solar marketing.
The EPC rating each route uses
| Route | EPC condition |
|---|---|
| Warm Homes: Local Grant (England) | D, E, F or G, alongside income conditions |
| Warm Homes Nest (Wales) | E, F or G with a means-tested benefit; D or lower on the health route |
| Boiler Upgrade Scheme | None since 28 April 2026 |
| Warm Homes Loan Scheme | None in the scheme's eligibility as published |
| 0% VAT on installed solar | None |
| SEG export payments | None; certification of the installation instead |
If the certificate is old, wrong or missing
A certificate reflects the home on the day it was assessed. If you have insulated the loft, replaced the boiler or had other work done since, the rating may now be better than the certificate shows; if the certificate is close to ten years old, the methodology may have changed too. A home with no certificate at all simply has no rating on record.
For the means-tested schemes, the council or scheme team will tell you what evidence it needs. Some arrange an assessment as part of their process, so don't pay for a new certificate before asking. If you do need one for another reason, an accredited domestic energy assessor can produce it; the assessor's accreditation scheme is shown on every certificate.
Be careful with anyone offering a "free EPC" as a way into a sales visit. A genuine scheme's assessment is arranged by the council or scheme, not by a cold caller.
When a better rating closes a door
Because the Local Grant is aimed at homes rated D to G, a home already rated C or better isn't eligible, even on a low income. That is deliberate: the scheme targets the homes that are hardest and most expensive to heat. It does mean a household that has already done some improvements may find the solar route closed.
In that case, the routes open to every household apply: the VAT relief, the loan scheme for owner-occupiers, and export payments. A home that is already well insulated is often one where solar's contribution to bills is easiest to see, because there is less heat loss for the electricity to make up for.
For homes on the line between C and D, the council's assessment is what decides, not an old certificate or an estimate.
Will solar panels improve my EPC rating?
Usually, yes. The assessment method takes account of electricity generated on site, so a home with solar panels generally scores better than the same home without them. How much better depends on the size of the system and the rest of the home. For a home on the boundary between two bands, that can move it up a band.
Two cautions. First, a better EPC rating doesn't by itself mean lower bills: the rating models a standard pattern of use, not yours. Second, if you are hoping to qualify for the Local Grant, having solar fitted privately first could lift the home out of the eligible band. Check eligibility before doing work you may later want funded.
It is also worth knowing what the rating doesn't measure. It says nothing about the condition of the roof, its orientation or shading, or whether the electrics are ready for a solar inverter. Those are for an installer's survey. A home rated F because of solid walls and an old boiler might still have an excellent roof for panels, and a well-rated home might have a north-facing roof that suits them poorly. The EPC tells a scheme how much a home needs help; it doesn't tell you whether solar is the right help.
Landlords have their own reasons to care about EPC ratings, set out in renters and landlords. For the schemes themselves, see Warm Homes: Local Grant and funding by nation.
Using your EPC to check the routes
- Look up your certificate on the GOV.UK register by postcode, and note the current rating and date.
- If it is D to G and you're in England, check the income conditions for the Local Grant; in Wales, check Nest's routes.
- If it is C or better, or you're above the income line, use the checker on the home page to see what else applies.
Where these facts come from
- GOV.UK — Find an energy certificate (EPC register) — checked 3 November 2026
- GOV.UK — Apply for Warm Homes: Local Grant (England) — checked 2 November 2026
- DESNZ — Warm Homes: Local Grant policy guidance, July 2026 (PDF) — checked 3 November 2026
- Welsh Government — Warm Homes Nest scheme annual report 2024 to 2025 — checked 2 November 2026
- GOV.UK — Boiler Upgrade Scheme: what you can get — checked 3 November 2026
- legislation.gov.uk — SI 2026/390, Boiler Upgrade Scheme amendments — checked 2 November 2026
- GOV.UK — Warm Homes Loan Scheme factsheet (27 October 2026) — checked 3 November 2026
Not sure which route, if any, fits your home?
Tell us where you live and what you are looking into. Your message reaches SEO-DONS LTD, the publisher of this explainer, and we answer by email. We are not a scheme and cannot approve anything, but we can point you to the right door.
What happens next
- Your message reaches SEO-DONS LTD, which publishes this explainer.
- We reply by email with the scheme or council page that fits, if there is one.
- Any application is between you and that scheme.