The 10 Warm Homes Loan Scheme lenders: compared

The Warm Homes Loan Scheme enables homeowners and private landlords to get lower-interest loans for home energy tech like solar panels, batteries, and heat pumps.

The government gives grants to lenders, which they then use to cut the interest rate on loans for eligible products.

Before you can access a subsidised loan, you have to pick a lender – either directly, or through an installer – and there are only 10 approved ones on the scheme.

They're pretty varied though, with two credit unions, three banks, one firm that only issues loans secured against homes with a mortgage, and one – Sunsave – that can deliver your quote, loan, installation, and support through one brand.

With Sunsave, you can choose from a variety of loan terms that last 3, 10, or 20 years, with interest rates that start from 0%. You can also pay it off whenever you like, with no fees or penalties.

To find out how much you could save with a low- or zero-interest loan, just answer a few questions below, and we’ll provide an estimate.

Who are the 10 Warm Homes Loan Scheme lenders?

The 10 Warm Homes Loan Scheme lenders are currently Sunsave, The Money Co-op, South Manchester Credit Union, Propensio, Secure Trust Bank, Selina Finance, Tandem Bank, HomeServe, Hometree Finance, and Thisbank.

There's no single interest rate offered by the scheme, with lenders either setting their own or leaving it to their retailers (that is, their installation partners).

The government gives each lender a grant that covers up to 20% of each loan, with the aim of cutting up to five percentage points from the loan's standard interest rate, up to a specific amount.

Most of the 10 lenders have published or told customers their interest rates for the scheme, though there are still some keeping details to themselves.

The same lender may also offer you different interest rates and terms, depending on which installer you pick.

For context, if you're borrowing at least £7,500, the cheapest standard personal loans (that is, not part of the Warm Homes Loan Scheme) come with an APR of around 5.9%, as of October 2026.

To learn more about the scheme, read our full guide to government loans for solar panels.

1. Sunsave

Why choose Sunsave?

There are lots of reasons to choose Sunsave.

We're the only lender on the list that delivers your quote, loan, and installation via one brand, meaning you'll have a single point of contact throughout the process – much easier than having to contact different people all the time.

Our sales, installation, support, and finance teams all sit next to each other, which isn't the case for any other lender. This means we communicate well, and come up with effective solutions more quickly. More on why this matters further down.

If you choose our 20-year Solar & Battery Plus package, you'll get the Solar & Battery Guarantee, which offers 24/7 monitoring, maintenance, replacement parts, and downtime credit. Your system will also be insured by Aviva against damage, fire, and theft.

So you can rest assured, knowing that we'll keep your system performing at its best, for as long as possible.

And if you choose our Home Battery Plus package, you'll also be protected. Every installation comes with a 10-year insurance-backed workmanship guarantee, and 10-year product warranties for both your battery and inverter.

All customers with compatible hardware can also benefit from Sunsave Sona, our smart algorithm that works in the background every day to get you the best savings.

It also connects your battery to a whole network of Sunsave customers' batteries, forming a virtual power plant that makes money for everyone involved by selling extra capacity to the grid.

With Sunsave, you can also pay off your loan (in full or in part) with no fees or penalties – whenever you like. To learn more, read our guide to flexible payments.

Who are Sunsave’s installers?

Our own MCS-certified teams look after every installation.

As mentioned above, we operate both a lender and installer, so you won't have to talk to two different companies – and make sure they're communicating with each other.

As well as MCS, we're also accredited by EPVS, RECC, and TrustMark, among others. To learn more, read about all our accreditations.

Soon, we'll add EV chargers to the list of products we offer through the Warm Homes Loan Scheme. You'll be able to include one in any loan that also involves solar panels or a battery, as long as it stays under the government's cap.

If you'd like to see the savings you could get from a solar & battery system – or a standalone home battery – just answer a few questions below, and we’ll provide an estimate.

2. The Money Co-op (applications paused)

The Money Co-op isn't currently accepting new applications.

On 2 November, just a week after the scheme began, the co-op said: "We’ve temporarily paused new eligibility applications so our team can focus on the high number already received."

Since the 1990s, this member-owned, not-for-profit co-op has worked for the benefit of its members, with a goal of "making saving and borrowing simpler, fairer and more accessible".

This shines through in its offering, which is the most straightforward proposal on the market. The Rochdale-based entity offers one interest rate – 2.7% – that doesn't change, no matter how much you borrow or how long your term is.

And to date, the first of two Greater Manchester credit unions on this list is the only lender that's publicly said it'll fund any and all of the improvements you can get through the scheme – though it's imposed an upper limit of £25,000.

You also have to be one of the co-op's 48,000 members to get a loan. To join, you must belong to a relevant union, work for a payroll partner, a charity, a co-op, or the NHS, or work in retail, health and social care, housing, education, or local government.

You must also agree to save at least £5 per month on top of loan payments.

Who are The Money Co-op's installers?

The Money Co-op hasn't partnered with any specific installers.

Instead, the co-op is telling customers that they can pick any installer, as long as they're MCS-certified.

Whichever firm you choose, it'll be your responsibility to pass on invoices to the co-op, which will then release money that you can use to pay your installer.

3. South Manchester Credit Union

This credit union of nearly 5,000 people offers loans to its members, who must live or work in south Manchester, central Manchester, or Trafford.

To qualify for a scheme loan, you'll also have to save at least £2 per week in a locked savings account. You can only withdraw from this account when you've repaid your loan.

If you're eligible, you can borrow a maximum of £15,000 from the community-based body, which is the lowest cap of any scheme lender that's widely advertising its offers.

The credit union also changes its interest rates according to the loan total, rather than the length of your contract – an unusual step among approved lenders.

And 9.4% is currently the highest interest rate that you can get from any lender on the scheme, as far as we're aware.

Who are South Manchester Credit Union's installers?

South Manchester Credit Union hasn't partnered with any installers.

Instead, the organisation allows you to hire anyone who's MCS-certified to install the products you want, whether that's solar panels, batteries, a heat pump, or an EV charger.

4. Propensio

Propensio was incorporated in 2017 as Credit4 TP, then became Credit4 Home Improvements before it changed owners – and names – in 2019.

The Rotherham-based company hands out loans for home improvements, renewable systems, holiday home purchases, and accessibility equipment.

When it comes to the scheme, Propensio has revealed very few details – but West Yorkshire-based installer Solar Xpress has announced that it's partnered with the lender to provide scheme loans.

Propensio CEO Dave Hindle implied which products his firm will fund when he responded to the scheme's launch by saying: “Demand for solar, battery storage and heat pumps continues to grow, but upfront cost remains one of the biggest barriers for many households."

This hasn't been confirmed, though.

Who are Propensio's installers?

Propensio isn't releasing details of its installers, so the only way to find out more information about its scheme loans is to find an installer that's partnered with the company for these loans – like Solar Xpress.

As yet, there's no information on which other installers have partnered with Propensio to offer home improvements through the scheme.

However, any MCS-certified installer who uses popular solar management platform OpenSolar has the option of using Propensio if they want to offer finance – meaning we could see other installers doing so in the near future.

5. Secure Trust Bank

Secure Trust Bank was founded in 1952, has been on the London Stock Exchange since 2011, and passed a million customers in 2018.

To provide loans, the Solihull-based company is using its finance arm V12 Retail Finance.

The firm has partnered with a variety of retailers that mostly offer furniture, jewellery, and leisure pursuits, as well as home improvements.

Who are Secure Trust Bank's installers?

Heatable is working with Secure Trust Bank to provide scheme loans for solar panels and batteries, with a 4.9% interest rate over 10 years.

The bank's subsidiary, V12 Retail Finance, doesn't have any other retailers on its platform that sell scheme measures, such as solar panels or batteries. We'll update this page if and when that changes.

6. Selina Finance

Selina's offer of a five-year loan must be secured against your property, so the firm only accepts homeowners with a mortgage.

This means that if you miss payments, you could put your home at risk.

The interest rate you'll receive will vary according to multiple factors, and will be provided as an APRC, not APR. This stands for Annual Percentage Rate of Charge, and shows you the overall amount your mortgage will cost in its entirety.

We understand interest rates of 1.9%, 2.1%, 2.7%, and 2.9% have been offered to customers, but the range and reasons for these different rates aren't clear, partly because Selina hasn't revealed any details itself yet.

Depending on what rate you get, this could be one of the better options around, as you can use it to install almost every measure included in the scheme.

Plus, even though it comes with an overall cap, £65,000 should be enough for you to get a solar & battery system as well as either a heat pump, a wind turbine, or a hydroelectric system – which is plenty.

However, every loan comes with a product fee of £495 or £995, to be paid when you accept your loan offer.

You'll also be charged for making any early repayments. The fee is 5% in year one of the loan, 4% in year two, 3% in year three, 2% in year four, and 1% in year five.

The lender, which has offices in London and Manchester, isn't providing scheme loans to landlords, homeowners who don't have a mortgage, or anyone in Scotland or Northern Ireland.

Who are Selina Finance's installers?

Selina has partnered with OpenSolar to provide solar installers with access to finance.

This partnership, which began in September 2026, seems to be the same as Propensio's relationship with OpenSolar, in that any installer using the platform can offer loans through Selina.

One of these firms is Underwood Electrical, a solar panel, battery, and heat pump installer in Newcastle-under-Lyme.

7. Hometree Finance

This financial services company is one of the Hometree Group's three arms. The others are an installer network that provides energy services, and a home services division that offers boiler and home emergency breakdown cover.

You can get a loan for solar panels and batteries through Hometree Finance, with no financial limit beyond those imposed by the scheme – but then it gets complicated.

Loans last either 5, 10, 15, 20, or 25 years, and depending on which you go for, you'll end up with one of four different interest rates, between 4.6% and 7.1%.

The company employs different installers for different parts of England and Wales, so which one you get will depend on where you live.

Who are Hometree Finance's installers?

Its installers include GreenGenUK in south-west England, and The Little Green Energy Company, which covers Kent, Surrey, and Sussex.

If you live further north, you may be served by IMS Heat Pumps, which carries out solar installations (despite its name) in the Midlands and northern England.

Or you could be paired with Geowarmth, which covers everywhere from the Scottish Borders down to Lancashire and Yorkshire.

8. HomeServe

HomeServe has been providing the British public with home emergency insurance for more than 30 years, and also installs EV chargers and boilers.

The Walsall-based company's lending arm, HomeServe Finance, has partnered with energy giant E.ON to provide loans for solar panels, batteries, and air source heat pumps through the scheme.

As a credit broker, E.ON can arrange for you to get a 0% interest loan from HomeServe Finance for solar panels – with or without a battery – and choose between a term of one, two, three or five years.

And when it comes to air source heat pumps, you can borrow up to £20,000 on a 0% interest loan for three or six years – though this is the cap before the Boiler Upgrade Scheme discount. Most homes in England and Wales can use the scheme to get a £7,500 discount.

10-year loans are also available for all these products, though they come with a higher interest rate of 4.6%.

As well as the scheme's standard eligibility criteria, you must also earn a minimum of £12,000 per year, and be at least 21 years old. This is slightly older than you have to be for most lenders, which usually have a lower limit of 18.

Who are HomeServe’s installers?

HomeServe, like almost all lenders on this list apart from Sunsave, doesn't carry out the installations.

Instead, the firm has partnered with installers E.ON (who are no longer a Which? Trusted Trader) and BOXT to supply solar panels, batteries, and heat pumps to the public.

9. Tandem Bank

Tandem Bank launched in 2014, bought Harrods Bank in 2018, and acquired home improvement loan company Allium Lending Group in 2020.

This may explain why the company, which has its headquarters in Blackpool and offices in Cardiff, Durham, and London, is ready to be an approved lender on this scheme.

Unfortunately, Tandem hasn't yet revealed much about its loans, installers, or eligibility criteria, beyond saying that applicants have to be 21-75 years old.

Who are Tandem Bank's installers?

The bank has said its installers must be "approved to offer Tandem finance", but hasn't provided any details beyond that.

Tandem has already partnered with a couple of installers – Project Solar for solar & battery systems, and British Gas for air source heat pumps – but this doesn't necessarily mean they'll join forces to provide scheme loans.

10. Thisbank

The UK arm of Jamaica National Group rebranded in 2026 as Thisbank, after hiring a new chief executive and chief transformation officer.

This lender, which traces its roots back to 1874 and the Westmoreland Building Society in the western Jamaican town of Savanna-la-Mar, is offering a couple of different loan options.

You can fund your purchase of solar panels, batteries, and an EV charger, at either a 4.6% or 4.9% interest rate on a 10-year loan, or a 6% rate over 15 years.

Customers must apply through one of Thisbank's installers, rather than directly through the lender.

Who are Thisbank's installers?

Thisbank is working with at least two installers to deliver scheme loans: Heatable and Glow Green.

These firms both started in the early 2010s as boiler companies, and have since expanded into other home energy technologies, such as solar panels, batteries, and EV chargers.

Glow Green offers a slightly lower interest rate on its 10-year option, and an additional 15-year loan, while Heatable allows you to delay payments for 12 months – though this will lead to a higher APR and interest rate.

Heatable also offers different interest rates depending on the products included.

How to choose a Warm Homes Loan Scheme lender

There are a number of important factors to consider when you're working out which lender to choose:

• Whether you’re eligible
• Whether you’re dealing with multiple brands or companies
• The total amount you’ll repay
• The quality of the hardware
• The installer
• Fees and early repayment charges
• Maintenance and warranties
• How much you’ll save

Whether you’re eligible

Every lender has its own eligibility criteria, in addition to the scheme's standard requirements.

Some require you to live or work in a certain area, be a member of the lender's organisation, or secure a loan against your home.

Others only serve customers in England and Wales, while at least one firm checks that applicants earn at least £12,000 per year.

Age ranges vary between lenders as well, with some imposing a minimum age of 21, and others including different upper limits.

When you look through all the eligibility requirements, you may find your list of potential lenders shrinking. Not everyone lives and works in specific areas of Greater Manchester, for instance.

Whether you’re dealing with multiple brands or companies

The vast majority of lenders on this list have had to partner with installers, because they don't fit systems themselves.

Customers who choose one of these lenders will have to coordinate with two companies, and hope they're also talking to each other. Unfortunately, there's no guarantee they'll communicate effectively, or work to solve problems together.

Some lenders on this list will also hold the grant given by the government until the installer charges you, at which point you'll have to send the invoice to your lender, who'll then release the relevant funds to your installer.

If you want to skip this process, Sunsave might be the right choice for you.

We're the only lender on the scheme that handles your quote, loan, and installation through one brand, meaning you'll have one point of contact. You won't have to contact different staff members or firms based on what's gone wrong.

Our sales, installation, support, and finance teams all work in the same room, meaning they can quickly come together to solve any issues that pop up, and won't pass the buck to another company.

And if you get our 20-year Solar & Battery Plus package, we'll provide 24/7 monitoring, maintenance, replacement parts, and downtime credit.

This means we'll keep an eye on your system, and if it isn’t generating electricity for an extended period of time, we’ll credit your monthly payments until we fix it.

The total amount you’ll repay

As a borrower, you'll probably want to check a loan's interest rate first – but the amount you'll have to repay may vary significantly between different installers.

A 0% loan is ideal, except if it's attached to an overpriced system that will end up costing you more than a low-interest loan on a fairly priced product.

It's therefore crucial to check the overall cost included in each quote, as well as the interest rate, to make sure you avoid overpaying.

You should also ask lenders whether they'll charge any fees or penalties for paying off some or all your loan early, since this could also affect your overall costs.

With Sunsave, you can pay off your loan, in full or in part, with no fees or penalties – whenever you like.

The quality of the hardware

However, there's no point getting a low-cost system if it's also made up of low-quality products.

You should ask multiple installers for quotes, and when you do, they should always include the specific equipment they'll be fitting. For example, a solar installer should tell you which panels, battery, and inverter they intend to supply.

When you have this information, do some research to see how the reviews, product warranties, and performance warranties for these products compare to others.

For instance, if you're planning on buying a battery, you should refer to our regularly updated list of the best batteries in the UK.

The installer

It's only worth getting cost-effective, high-quality gear if it's installed properly – otherwise it won't work as well as it should, and you won't get all the financial benefits you've paid for.

You may also end up spending more money to fix issues with the system, such as dodgy connections, loose cables, and messy wiring.

So while you're considering which lender to go with, take some time to assess the installers you can use with them.

Make sure they have a high rating on a reputable review site, like Which? Trusted Traders, Trustpilot, or Google, as a long history of happy customers is a great indication that you'll get a flawless installation.

And check their accreditations, so you know they've put in the effort – and expense – of securing industry seals of approval that you can trust.

Fees and early repayment charges

If you want to pay off your loan early – whether in full or in part – some lenders will charge you for the privilege.

Selina Finance, for example, has said that for its scheme loans – which are all five years long – "early repayment charges of 5%, 4%, 3%, 2%, and 1% apply in years one to five."

Other firms like Sunsave allow you to pay off your loan at any time, in full or in part, with no penalties.

So if you come into some money, and want to use it to lower your monthly payments or reduce your term length, you can do it without incurring extra charges.

Maintenance and warranties

Once you've had your system installed, you'll want it to keep functioning well for as long as possible.

To achieve this, there are two things you should do: choose equipment that comes with lengthy product warranties and top-tier performance warranties, and get a package that includes maintenance and replacements.

If you get a solar & battery system, your panels' lifespan should be around 30 to 40 years – but your battery will probably need replacing after 10 to 12 years, and 34% of inverters fail by their 15th year, according to a Bern University of Applied Sciences study.

If you need to pay for at least one new battery and inverter over the coming decades, it'll cut into your energy bill savings. Instead, you could pick a company that'll be on call if anything goes wrong, and which is prepared to install out-of-warranty replacements.

Our 20-year Solar & Battery Plus package includes the Solar & Battery Guarantee for the full term. This includes 24/7 monitoring, maintenance, replacement parts, and downtime credit, subject to our policy.

We'll help you with any warranty claims, and your system will also be insured by Aviva against damage, fire, and theft.

How much you’ll save

Your overall savings will differ depending on a bunch of factors, including ones we've already mentioned like how much you'll repay, the quality of your hardware, and early payment fees.

But another crucial point to consider is whether your installer offers any other way of saving or earning money, especially if you get a system with solar panels, a battery, or both.

Every Solar & Battery Plus and Home Battery customer can sign up to Sunsave Sona, our smart algorithm that works in the background every day to get you the best possible savings.

Sunsave Sona uses intelligent scheduling to make sure your battery is buying the optimal amount of electricity at the lowest price available.

And it connects your battery to other Sunsave customers’ batteries, so they can work together to form a virtual power plant (VPP).

We guarantee a minimum monthly payment of £15 for the first 12 months with Sunsave Home Battery, and for 18 months with Solar & Battery Plus. So you'll get at least £180 in your first year, on top of all your other savings.

And you could earn more than that. We’ve been testing our VPP with customers since October 2025, and we’ve paid over the guaranteed minimum amount every month so far, with an average monthly payout of around £23.

Summary

The 10 approved lenders differ significantly in multiple areas, including interest rates, eligibility criteria, term lengths, and which areas they serve.

Some haven't published all their rates, and may never reveal every installer they're working with.

The best one for you depends on which home energy tech you'd like to get, where you live, and whether you'd rather pay less per month or overall.

With Sunsave, you can choose from a variety of loan terms that last 3, 10, or 20 years, with interest rates that start from 0%. You can also pay it off whenever you like, for free – and we're the only lender that also owns and operates an MCS-certified installer.

To find out how much you could save with a low- or zero-interest loan, just answer a few questions below, and we’ll provide an estimate.

FAQs