Save on solar and heat pumps with cashback from your bank
Fancy up to £2,000 back when you go green?
If you’ve got a mortgage with Lloyds, Halifax or Barclays, you could pocket up to £2,000 cashback when you install a heat pump - or £1,000 if you go for solar and a battery.
And if your mortgage is with Nationwide, you could get a 0% loan of up to £20,000 to make green improvements.
Just a heads-up: cashback comes from your bank, not us, and only applies if your bank is taking part and you meet their eligibility criteria.
Lloyds Eco Home Reward
Heat Pumps
With £2,000 cashback
Solar Panels
With £1,000 cashback
Solar Battery Storage
With £1,000 cashback
Need to know
Available for Lloyds mortgage customers applying for a new mortgage, additional borrowing or switching to a new deal after 31 July 2024.
One claim per mortgage.
You need to complete the home improvement within one year of applying for a Lloyds Bank mortgage, additional borrowing or new deal.
In addition to £2,000 cashback, if you’re a Lloyds Bank borrowing, mortgage, savings, investment or insurance customer and get a heat pump installed with Octopus, you’ll also be eligible for £100 energy credit.
See full details on their website
Psst! If you applied for a Lloyds mortgage or switched to a new deal between 15 October and 24 November 2025, you could get a free heat pump on Lloyds. See the offer page for more details.
Halifax Green Living Reward
Heat Pumps
With £2,000 cashback
Solar Panels
With £1,000 cashback
Solar Battery Storage
With £1,000 cashback
Need to know
Available for Halifax mortgage customers applying for a new mortgage, additional borrowing or switching to a new deal after 31 July 2024.
You need to complete the home improvement within one year of applying for a Halifax Bank mortgage, additional borrowing or new deal.
In addition to £2,000 cashback, if you’re a Halifax borrowing, mortgage, savings, investment or insurance customer and get a heat pump installed with Octopus, you’ll also be eligible for £100 energy credit.
See full details on their website
Barclays Greener Home Reward
Heat Pumps
With £1,000 cashback
Solar Panels
With £500 cashback
Solar Battery Storage
With £500 cashback
Need to know
Available to Barclays residential mortgage customers only.
One claim per mortgage.
Must be your permanent residence.
Must use a TrustMark approved installer.
Cashback is paid 30 days after install into bank account mortgage payments are taken from.
You’ll have three months from the date you made the final payment for your installation to submit your claim for the Greener Home Reward.
See full details on their website
Nationwide Green Additional Borrowing
Interest-free loans
Up to £20,000 for green home improvements
Need to know
Available to Nationwide mortgage customers only.
One Green Additional Borrowing mortgage per property.
Choose from a 2 or 5 year fixed rate-mortgage.
Get 0% fixed interest for the first 2 or 5 years.
100% of the loan must be used to make energy-efficiency improvements to your home.
The term of the additional borrowing cannot exceed the term of the main mortgage.
See full details on the website
Making green energy cheaper for everyone
Octopus are on a mission to decarbonise UK homes.
That’s why we’ve worked hard to bring down the cost of installing low carbon tech, like heat pumps, solar and battery, in homes across the UK, making it easier and more affordable to benefit. Here are some of the other ways we’re reducing the cost of installation:
Solar panels
Pay monthly with finance. This means you'll pay nothing upfront for your solar panels and pay them back over 5, 7 or 10 years at a fixed interest rate of 9.9% APR through our partnership with Zopa.
Take control of your electricity bills with solar and an import and export tariff. Octopus Flux is designed to give you the best rates for soaking up those sunny rays and selling them back to the grid in peak periods.
Heat pumps
Get up to £9,000 off a new heat pump with government grant (we’ll apply for the grant on your behalf - eligibility rules apply)
Technology you can trust. We've become the first energy provider to make and install our own heat pump with easy controls and smart benefits.
Affordable and accessible for all — most of our heat pump quotes beat the national average cost.
Once you’re heat pump is installed, you'll benefit from smarter, electric heating which could be cheaper to run than a gas boiler with the Cosy Octopus heat pump tariff.
Our most popular system starts from £11,115
Our most popular system is a 12 panel installation with a 10kWh smart battery which costs £11,115. All costs are based on April 2026 prices.
Your solar system, designed and installed from just £6,663
Our prices start at £6,663 for a 2 panel installation with no battery, based on April 2026 prices.
What's the average cost to have solar panels installed by Octopus energy? (FAQ)
The cost of installation can depend on how many panels you need, whether you choose to have battery storage, and what size of battery you require. The cost of a panel-only installation by Octopus starts from £6,663 (for 2 panels). Our most popular system is a 12 panel installation with a 10kWh smart battery which costs £11,115 All costs are based on April 2026 prices.
You'll have the option to pay monthly with a fixed-term loan, or pay in full after installation. We'll ask you to pay a non-refundable deposit of £500 when you sign your installation agreement.
Your solar and battery system could pay for itself in 9-13 years
According to the Energy Saving Trust, a solar system can pay back its cost in 9–13 years, depending on where you live and how much time you spend at home.
Payback periods are affected by factors such as your household electricity use, your roof size and orientation, and whether your system includes a battery.
After a free consultation, our solar specialists can provide a tailored estimate of your potential savings and payback period based on your home and system design.
Solar systems increase the value of your home
Analysis by the Department of Land Economy at the University of Cambridge suggests a 16% value uplift for new-build homes with enough solar and battery storage to eliminate energy bills. A further study of over five million existing properties indicates a 2-3% value increase for existing homes with solar panels or heat pumps (versus like-for-like gas-heated homes). According to the Sustainable Markets Initiative: Sustainable Markets Initiative: Cleantech Homes report, 2024.
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Milly Sullivan
Writer