Your complete guide to grants, loans, and funding options for heat pumps, solar energy, and other low‑carbon home improvements in the UK.
Why Financing Matters for Renewable Upgrades
With energy prices rising and the UK pushing toward net‑zero emissions by 2050, more homeowners are looking at renewable technologies like air source heat pumps, solar panels, and battery storage. These upgrades can cut bills, reduce carbon emissions, and future‑proof your home, but the upfront costs involved can often feel like a barrier.
The good news is that there has never been more financial support available for UK homeowners who want to switch to cleaner, more efficient systems.
This guide breaks down every major funding option, including:
- Government grants like the £7,500 Boiler Upgrade Scheme
- 0% VAT on heat pumps, solar and insulation
- Green mortgages and low‑interest loans
- Optional private finance and staged payment options
- How to decide which funding route is right for you
By the end, you’ll know exactly how renewable financing works, what you may qualify for, and how to reduce — or even eliminate — your upfront costs.
Why Invest in Renewable Energy for Your Home?
Before we get into the money, it helps to answer the bigger question: Why upgrade in the first place?
The benefits are financial, environmental, and long‑term.
Benefit | Why It Matters |
Lower energy bills | Heat pumps and solar reduce monthly heating and electricity costs |
Protection from fuel price rises | Gas and oil costs are unpredictable — electricity is more stable |
Increases property value | Homes with heat pumps, solar or high EPC ratings sell faster and at higher prices |
Reduces carbon footprint | Heating makes up 18% of UK emissions — switching cuts this dramatically |
Qualifies for government grants | The UK is paying homeowners to upgrade while incentives are still active |
For many households, the only question left is how to afford the installation — and that’s where smart financing comes in.
Government Grants & Incentives for Renewable Energy in the UK
The UK government offers several schemes that help homeowners finance renewable energy upgrades, especially installing low‑carbon heating.
Here are the main funding routes you should know about:
Boiler Upgrade Scheme (BUS) – £7,500 Grant for Heat Pumps
The Boiler Upgrade Scheme gives homeowners a grant of £7,500 towards the cost of installing an air source heat pump.
Who’s eligible?
- Homeowners in England or Wales
- Existing homes (not new builds)
- Replacing gas, oil, LPG or electric heating
- EPC does not require loft or cavity insulation improvements
What does it cover?
- Air source heat pumps
- Ground source heat pumps
- Biomass boilers (in rural areas)
How it works with Adlår: Adlår handles the full application for you and deducts the grant from your quote upfront — so you don’t have to claim it later. That means no paperwork, no delays, and lower upfront cost immediately.
With the BUS grant applied, Adlår installations can be as low as £0–£6,500, depending on your system size and setup.
0% VAT on Renewable Heating and Energy Systems
Until 2027, homeowners pay 0% VAT on the supply and installation of energy efficiency products, including:
- Air source heat pumps
- Solar panels
- Battery storage (if installed with solar)
- Insulation upgrades
- Heat controls and thermostats
This removes the usual 20% surcharge, resulting in a huge saving on bigger installs.
ECO4 Scheme – Fully Funded Upgrades for Lower‑Income Households
If you receive income‑based benefits or live in a low‑efficiency home (EPC rating D‑G), the ECO4 scheme may fund up to 100% of improvements including:
- Heat pump installation
- Insulation (loft, cavity, solid wall)
- Smart heating controls
- Solar PV in some cases
Eligibility is based on income and property type, not just the homeowner’s status. Many people qualify without knowing. However, the 2025 Autumn Budget revealed that ECO4 will end on 31 March 2026, and there is no direct replacement scheme lined up, so homeowners should take advantage of the scheme as soon as possible.
Local Council & Regional Grants
Some councils offer top‑up grants, energy rebates, or retrofit funds, especially in low‑income, rural, or high‑emission areas.
Examples:
- Home Upgrade Grant (HUG)
- Greater London Authority retrofit funding
- Local Net Zero transition funding
These change frequently, so it’s worth checking your postcode or asking Adlår to check eligibility during your consultation.
Green Loans, Mortgages & Finance Options
Not every homeowner will qualify for grants, and some want to finance the remaining cost rather than pay upfront. The following are the main finance options used in the UK.
Green Mortgages
Offered by lenders such as Nationwide, NatWest, Halifax, and Barclays, green mortgages give better rates when you buy an eco‑efficient home, improve your EPC rating with upgrades like heat pumps/solar, or borrow extra specifically for energy improvements.
Examples:
- Nationwide Green Additional Borrowing (up to 85% LTV for energy upgrades)
- Barclays Greener Home Reward (£2,000 cashback if upgrading EPC)
Energy‑Efficient Home Loans (Low‑Interest “Green Loans”)
Some banks now offer low‑interest personal loans only for renewable upgrades, including:
- Heat pumps
- Insulation
- Solar + battery
- EV chargers
Providers include:
- Triodos Bank
- Ecology Building Society
- GFI Energy Efficient Loans (coming 2025)
Interest rates are often lower than standard loans because the upgrade reduces financial risk by lowering living costs.
Installer Finance/0% Repayment Plans
Some renewable installers offer split-payment or interest-free plans, allowing you to spread the cost over 12–60 months.
Important factors:
- Check whether the rate stays 0% the whole time
- Watch out for “buy now pay later” deals with back‑loaded interest
- Make sure installation and servicing are included in the price
Remortgaging to Fund Upgrades
If you’re planning multiple home upgrades (for example heat pump, solar, and insulation), remortgaging can sometimes be the cheapest borrowing method.
Pros:
- Lowest borrowing rate if spread over 10–25 years
- Increases property value immediately
- Makes sense for long‑term homeowners
Cons:
- More admin and legal checks
- Can cost more overall if extending mortgage term
Which Financing Route Is Best for You?
Situation | Best Option |
You want the lowest possible cost | BUS Grant + 0% VAT |
You’re on a low income or benefits | ECO4 (may be fully funded) |
You’re upgrading your whole home | Green mortgage or remortgage |
You want predictable monthly payments | Low‑interest green loan |
You want to avoid borrowing | BUS + staged payment plan |
You want a turn‑key process | Installer‑managed grant + finance (Adlår route) |
The Long‑Term ROI of Renewable Upgrades
Even when financing is involved, renewable upgrades typically pay for themselves through:
Lower monthly bills
- Heat pumps save £200–£600 per year vs gas boilers
- Solar panels save £400–£900 per year depending on usage
- Battery storage increases savings further
Reduced maintenance and replacements
Heat pumps last 20–25 years (boilers last 10–15)
Higher property value
Homes with heat pumps and EPC A/B ratings sell faster and at higher value
Protection from gas price volatility
Energy crises affect fossil fuels most — not electricity
Environmental return
Cuts CO₂ emissions by up to 100% when paired with renewables
How Adlår Helps You Fund Your Heat Pump Installation
Adlår simplifies renewable financing by:
- Handling 100% of the Boiler Upgrade Scheme grant application
- Offering fixed, all‑inclusive quotes — no hidden install charges
- Providing free home survey + heat loss calculation
- Helping you compare finance, grant and repayment options
- Completing most installs in 1–2 days with in‑house engineers
- Offering systems already compatible with solar and smart controls
You’re never left to figure out the paperwork or technical details on your own.
FAQs: Financing Home Renewable Energy Upgrades
Q: What grants are available for heat pumps in the UK?
A: The main grant is the Boiler Upgrade Scheme, which gives homeowners £7,500 toward installation. Some may also qualify for ECO4 or regional grants.
Q: Can I get a loan to install a heat pump or solar panels?
A: Yes, several UK lenders now offer green loans or green mortgage top‑ups specifically for renewable upgrades. Rates are often lower than standard loans.
Q: Is the Boiler Upgrade Scheme still available in 2025?
A: Yes, it is confirmed active through until the end of 2027, but funding is capped and issued on a first‑come, first‑served basis.
Q: Can I combine grants with finance?
A: Yes. Many homeowners use the BUS grant to reduce upfront cost, then finance the remaining balance through a loan or mortgage.
Q: Is it better to finance upgrades or pay upfront?
A: If you have savings, paying upfront gives the fastest return on investment. If not, low‑interest green loans still offer strong long‑term savings because heat pumps reduce bills immediately.
Q: Does installing a heat pump increase my home’s value?
A: Yes, homes with renewable heating and high EPC ratings are selling faster and above market average, especially as gas regulations tighten.
Financing Doesn’t Have to Be a Barrier
Most homeowners are surprised to learn that renewable upgrades don’t require paying £10,000+ upfront. With the £7,500 BUS grant, 0% VAT, new green mortgages, and low‑interest loans, it’s now possible to install a heat pump or other renewable upgrade for far less than expected — sometimes with no upfront cost at all.
If you’re considering switching from gas to a high‑efficiency heat pump, now is the ideal time, before grants change and before heating regulations tighten further.
Ready to find out what you qualify for? Book your free consultation and heat pump quote with Adlår. We’ll check your funding eligibility, handle the grant paperwork, and give you a fixed, transparent cost breakdown.
