Free Solar Panels: Government Grants for 2026
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Solar panels let you generate free electricity from sunlight, cutting your energy bills by £300-£500 per year. While solar panels aren't cheap to buy outright (£5,000-£8,000), government grants through ECO4 and the Warm Homes: Local Grant can cover the full cost for eligible households. You can also earn money by exporting excess electricity to the grid via the Smart Export Guarantee (SEG).
Typical Annual Benefits
How Do Solar Panels Work?
Solar photovoltaic (PV) panels convert sunlight into electricity. They work on daylight — not direct sunshine — so they generate power even on cloudy days, though output is higher in summer.
A typical UK home installation is 3-4kW (8-10 panels), covering around 20m² of roof space. The panels connect to an inverter that converts DC electricity to AC for your home. Any electricity you don't use can be exported to the grid for payment through the Smart Export Guarantee.
Which Grants Cover Solar Panels?
- ECO4 — Solar PV is an eligible measure under ECO4 (until December 2026). Usually installed alongside insulation measures.
- Warm Homes: Local Grant — England only. Solar panels can be funded as part of a whole-house energy efficiency package, up to £30,000.
- Home Energy Scotland — Interest-free loans up to £6,000 for solar PV, plus cashback grants.
- Note: The Boiler Upgrade Scheme (BUS) does NOT cover solar panels — it's only for heating systems.
Solar Panels: Key Facts
| Detail | Information |
|---|---|
| Typical system size | 3-4kW (8-10 panels) |
| Roof space needed | ~20m² |
| Best orientation | South-facing (SE/SW also good) |
| Installation time | 1-2 days |
| Cost without grant | £5,000-£8,000 |
| Annual generation | 3,000-4,000 kWh |
| Lifespan | 25-30 years (panels), 10-15 years (inverter) |
| Maintenance | Minimal — occasional cleaning |
Am I Eligible for Free Solar Panels?
Free solar panels through grants are available if:
- You receive a means-tested benefit (Universal Credit, Pension Credit, etc.)
- Your household income is below the scheme threshold
- Your property has an EPC rating of D or below
- Your roof is suitable (south/SE/SW facing, not heavily shaded, structurally sound)
- Your property isn't listed or in a conservation area with restrictions on panels
Important Considerations
Systems up to 3.68kW (G98) just need notification — your installer handles this. Larger systems (G99) need prior approval from your electricity distributor, which can take 45-80 working days.
Adding a battery (£2,500-£5,000) lets you store excess solar electricity for evening use. Batteries are NOT currently covered by government grants, but prices are falling rapidly.
You're paid for electricity you export to the grid. Rates vary by supplier (3-15p/kWh). Your installer can help you sign up.
Frequently asked questions
Are free solar panels really free?
Yes, if you qualify for ECO4 or the Warm Homes: Local Grant, the full cost of solar panel installation is covered by the grant. There are no hidden charges or payments.
Do solar panels work in the UK?
Yes. The UK gets enough daylight for solar panels to be effective. A typical 4kW system generates 3,000-4,000 kWh per year — enough to cover a significant portion of your electricity use.
Will solar panels damage my roof?
No. Panels are mounted on rails attached to your roof rafters. A reputable MCS-certified installer will ensure the fixings are watertight. Your roof should be in good condition before installation.
Can I get solar panels if I rent?
Potentially, but your landlord must consent and be involved in the application. The panels become a fixture of the property.
What happens at night or on cloudy days?
You draw electricity from the grid as normal. Solar panels reduce your grid usage during daylight hours. A battery can store daytime solar for evening use, but batteries aren't currently grant-funded.
Do I need planning permission for solar panels?
Usually no. Solar panels fall under permitted development for most homes. Exceptions apply to listed buildings, conservation areas, and flats. Your installer will advise.
Find Free Solar Panel Grants in your area
See how Free Solar Panel Grants works in your area, including local council schemes, eligibility criteria, and nearby installers.
Other available grants
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