Green Homes Wales Loan 2026 – 0% Interest Funding for Heat Pumps & Solar in Swansea
- hannahharvey2
- Mar 2
- 5 min read
If you’re a homeowner in Swansea or anywhere in Wales looking to install a heat pump, solar panels or battery storage, the Green Homes Wales could make it far more affordable.
This Welsh Government-backed scheme offers 0% interest loans through Wales Development Bank to help homeowners upgrade to low-carbon heating and renewable energy systems — without large upfront costs.
If you don’t qualify for ECO4 grants, this is often the next best option.
What Is the Green Homes Wales Loan?
Green Homes Wales is designed to help owner-occupiers improve:
Energy efficiency
Home comfort
Carbon performance
Long-term running costs
You can typically borrow between £1,000 and £25,000, interest free, repayable over several years (subject to scheme rules at the time of application).
There’s also usually a six-month repayment holiday, giving your new renewable system time to start lowering your energy bills before repayments begin.
For many homeowners in Swansea, Neath Port Talbot, Brecon, Bridgend, Cardiff, Carmarthenshire, this removes the biggest barrier — upfront capital.
What Can the Loan Be Used For?
The scheme can fund:
Air source heat pumps
Ground source heat pumps
Solar PV systems
Battery storage
Insulation upgrades
Heating controls and energy efficiency improvements
This makes it ideal for full renewable upgrades rather than piecemeal improvements.
Who Can Apply?
To qualify for the loan:
✔️ You must own the property
✔️ It must be your main residence
✔️ The home must be located in Wales
✔️ It can’t be a brand new build (usually meaning it’s already been lived in)
✔️ You must pass affordability and credit checks
Landlords aren’t eligible under the current scheme, and listed buildings or properties needing special permissions may not qualify.
Heat Pump + Solar PV Together = Extra Contribution
If you install a heat pump and solar PV together, there is often a small grant contribution towards the solar PV element (typically under £2,000).
It’s not a huge grant — but every little helps.
That contribution reduces the amount you need to borrow, improving overall affordability. The exact contribution depends on current scheme rules and available funding, which can change. Find the latest guidance here:
Pairing technologies makes real financial sense:
Heat pumps increase electricity use
Solar panels generate your own power
Battery storage captures surplus generation
Your running costs reduce significantly
Done properly, it’s a complete home energy solution.
Green Homes Wales vs ECO4 – What’s the Difference?
The Energy Company Obligation (ECO4 and any future replacement scheme) works very differently. [Please note, at the time of writing, some of the replacement scheme information, for example regarding planning, is only relevant in England.]
ECO4:
Fully funded grant
Strict eligibility criteria
Usually for low-income or fuel-poor households
Based on EPC rating and benefits
No repayment required
Green Homes Wales Loan:
Available to a much wider group of homeowners
0% interest loan rather than full grant
Greater flexibility in system design
Suitable for higher-spec renewable packages
Repayments offset by energy savings
Works alongside Boiler Upgrade Scheme Grant for £7,500 (subject to limitations - read our blog on the BUS grant here)
If you qualify for ECO4 — absolutely use it.
If you don’t, or you want a more comprehensive renewable system (heat pump + solar + battery), Green Homes Wales gives you more control and flexibility.
🛠️ The Green Homes Process — Step by Step
Here’s a typical journey if you decide to take part:
1️⃣ Start with Free Advice
Before you can apply, you’re strongly encouraged to get general energy efficiency guidance — for example through the Welsh Government’s Nest service — so you know all the support available for your situation.
2️⃣ Home Assessment
A Retrofit Coordinator will visit your home at no upfront cost to you and do a detailed assessment. They’ll recommend tailored improvements based on your property’s needs.
3️⃣ Choose Upgrades & Quotes
Once you have your report, you can gather quotes and decide which energy-saving measures you want to install. You don’t have to go ahead until you’re ready.
4️⃣ Apply for the Loan
Submit your application through the Green Homes Wales portal. Your eligibility — including credit checks and affordability — will be assessed.
5️⃣ Installation & Repayment
Once approved, you get your loan, installation is scheduled with qualified installers, and after the 6-month repayment holiday, you begin regular repayments.
How Limitless Energy Supports Your Application
At Limitless Energy, we have already worked with dozens of homeowners and their Retrofit Coordinators across Swansea, Neath Port Talbot, Brecon, Bridgend, Cardiff and Carmarthenshire to design and install complete renewable systems.
Carry out full heat loss surveys
Specify correctly sized heat pumps
Design solar PV and battery systems
Provide formal quotations for your loan application
Install and commission the system
Optimise performance for long-term savings
Provide all the details required by Retrofit Coordinators for a smooth process
We don’t just install equipment — we work with you to understand your needs, and design systems that reduce running costs and genuinely future-proof your property.
Because with renewables, design matters.
Real Homeowner Experience – North Swansea
Tristan, a homeowner in North Swansea, recently upgraded his property through the scheme and said:
“The benefit of the Green Home Wales loan was that it gave me the cash injection to upgrade my property and transition to renewables. The money we save on our reduced running costs more than pays back the loan each month. It's fantastic.”
That’s exactly how the scheme is intended to work.
Lower energy bills help offset repayments — while your home becomes warmer, greener and more efficient.
Is the Green Homes Wales Loan Worth It?
It may be right for you if:
You don’t qualify for ECO4
You want a heat pump and live in Wales
You’re considering solar panels and battery storage
You plan to stay in your property long term
You want protection against rising energy costs
With 0% interest funding, the ability to combine technologies, and potential small grant contributions towards solar, it’s one of the most practical routes to renewable upgrades in Wales.
Ready to Upgrade to Heat Pumps or Solar in Swansea?
If you’re considering the Green Homes Wales loan and want expert advice on:
Combined renewable packages and how they will work for you.
Boiler Upgrade Scheme Installer - we claim the £7,500 OFGEM grant and reduce your installation costs by this amount.
Contact Limitless Energy today.
We’ll assess your property, design the right system, provide a detailed quote for your loan application, and guide you through the process from start to finish.
Get in touch now to book your survey and see how much you could save.
📞Call us on 01792 361638
📝Email us on info@limitless-energy.co.uk
💡Get a free online estimate for your heat pump this week
Your renewable upgrade starts with the right design, and the right installer.
We design, install and maintain heat pumps, solar panels, battery storage, EV chargers and solar thermal in: Swansea, Neath Port Talbot, Brecon, Bridgend, Cardiff and Carmarthenshire.
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