Are free solar panel grants really free?

Yes — if you qualify under ECO4 or local authority schemes, the funding can cover all or part of your solar installation cost. There’s no repayment required, but you’ll need a property survey.

These grants mainly target homeowners, though landlords may apply for tenants under certain council programmes.

How accurate are the calculator results?

Estimates are based on UK averages from verified MCS data. Actual results depend on roof size, shading, and installation quality.

Can I combine solar with other energy upgrades?

Yes — you can combine solar installation with insulation, heat pumps, or boiler upgrades to boost savings.

Free Solar Panel Calculator & Eligibility Checker (UK 2025)

Q: How long do solar panels last?

Most panels carry 25-year warranties and last up to 30 years with minimal maintenance.

Find Out If You Qualify for Free or Discounted Solar Panels in Minutes

Curiosity as to whether your house is also eligible to free or subsidised solar panels with the ECO4 or local council funding programmes?
With a few simple questions, you can soon have an idea of which of your property could be saved, how long your investment may pay back and whether your property is eligible to government-supported assistance.

Quick Solar Eligibility Check

Find out how effective your roof would be in creating renewable energy, the approximate cost of the installation, and how much you would save every year.
Our calculator provides you with clear, UK-specific numbers – no complex terms and sales spiel, just plain and simple numbers.

UK Solar Energy Savings Calculator

Calculate your savings within a few minutes.

Property Type

Detached
Semi-Detached
Terraced
Bungalow

Available Roof Size

Small (20–30 m²)
Medium (30–50 m²)
Large (50 m² or more)

Average Monthly Electricity Bill (£)

e.g. 120

Next Step → Roof Details

How the Calculator Works

Provide Property Information – Provide simple information on your house such as house ownership, roof direction and shade.
We Estimate Solar Output – We use proven data on sunshine, nationwide in the UK and system average efficiency.
Instant Eligibility Results – You can immediately find out whether you are eligible to receive ECO4 or local-authority-funded solar help.
Review Potential Benefits –See a breakdown of your probable savings, payback period, and estimated CO2 savings.

Why Go Solar in 2025

Slash Your Energy Bills –The average UK household will save PS300 to PS600 on a yearly electricity bill.
Access Government Funding –ECO4 and local programmes may help to pay some or all of your installation fees.
0% VAT Until 2027 – Solar panel installations done in the country are not subject to VAT in the next two years.
Boost Property Value –Houses will have greater EPC rating which makes them more attractive and energy efficient.
Reduce Carbon Emissions –An average system can reduce approximately 900kg of CO2 each year, which can make you live a more sustainable life.

UK Grants for Renewable Energy

Who is most likely to be able to get free or cheap solar panels?

You’re more likely to be approved if you:

Own your home (not renting).
Have an EPC rating of D or lower.
Get benefits related to income like Universal credit and Pension credit.
Have a south-facing roof (or southeast/southwest) with little to no shade.

Although you may not fit all these criteria, in most areas there are counsel schemes called LA Flex which is a flexed funding pathway to enable partial-eligibility households to enjoy the solar incentives.

Environmental Benefits

An average 4 kW solar panel system will counter the emission of 900 kg of carbon dioxide annually – about 40 tree planting annually.

Moving to solar will enable you to lower the carbon emission in the country and become part of the direct contribution of the UK to Net Zero 2050 promises.

Frequently Asked Questions

Are solar grants truly free?

Yes. In case you live up to the requirements of ECO4 or your local authority scheme, your installation can be fully or partly subsidized – with no repayment. Eligibility will be verified by a swift survey of the property.

Can renters apply?

How reliable are the calculator’s figures?

The calculations were made using the validated MCS data and the national averages of sunlight. The real savings can be different due to the direction of the roof, its size and quality of its installation.

Can I combine solar with other upgrades?

Yes, sure – solar panels can be used in combination with insulation, heat pumps or new boilers to achieve even more savings.

How long do solar panels last?

The majority of them carry 25-year warranties and can perform successfully during three- to ten-year periods with minimum maintenance.

Disclaimer

The numbers given by this calculator are approximations based on the average data in the UK.

The ultimate qualification and performance is a factor of your roof shape, exposure to sunlight, cost of installation and the availability of funds locally.
Always verify details with a certified MCS installer or independent energy consultant.