Green mortgages

What does your lender offer for solar?

Most UK lenders have a green home-improvement product, but the value varies a lot. Some pay cashback. Some lend at 0%. Some only reward homes that are already efficient. Pick your lender for a verified breakdown.

0% interest loan

Nationwide

Up to £20,000 at 0% interest

See what's possible

Cashback on install

Barclays

Up to £2,000 cashback after install

See what's possible

Cashback on install

Halifax

Up to £1,750 in combined benefits (caveats apply)

See what's possible

Cashback on install

Lloyds Bank

Up to £1,000 cashback (Club Lloyds required)

See what's possible

Better mortgage rate

NatWest

0.10% off your mortgage (EPC A/B homes)

See what's possible

Cashback on install

HSBC

£350–£1,250 cashback (EPC A/B homes)

See what's possible

Your lender isn't here, or you're not sure?

Tell us your lender and we'll look into it

What we've deliberately left off

Two products you might still see quoted online.

Santander £1,000 green cashback

Closed 30 June 2025. Many third-party sites still list it as live. It isn't. The only Santander-side incentive currently live is a £500 install discount via Octopus, which is tied to Octopus as the installer.

Virgin Money Retrofit Boost

Withdrawn 9 December 2025. The Virgin Money brand transferred to Nationwide on 2 April 2026, so Virgin customers' route now sits inside the Nationwide product set above.

Geko Energy is not a regulated mortgage adviser. All lender information on these pages is factual, sourced from each lender's own published pages and verified on 23 June 2026. Always confirm current terms direct with your lender. Eligibility is determined by your lender, not by Geko. For regulated mortgage advice, speak to an FCA-authorised mortgage broker.