Solar panels in London
£4,030 to £12,680 installed, 1,625 hours of sun a year, and 1,030 installations already in the council area.
What a system costs in London
3kWp
£4,030–£5,390
Saves up to £373 a year. Pays back in about 13 years.
4kWp (most common)
£6,430–£8,130
Saves up to £580 a year. Pays back in about 13 years.
6kWp
£9,390–£12,680
Saves up to £853 a year. Pays back in about 13 years.
Source: Home Energy Quotes Cost Index, costs modelled March 2026, savings at the October to December 2026 price cap. Prices are estimates and include installation and VAT. Actual costs may vary.
London in numbers
Published statistics for the Westminster council area, not our estimates.
At the end of 2025 there were 1,030 solar PV installations in the Westminster council area, about 10.9 for every 1,000 households, with 6.8 MW of capacity between them. The count covers every size of installation, on homes and businesses. 36% of homes with an EPC in the Westminster council area are rated D to G, and the median energy score is 71, which is band C.
| Westminster council area | Figure | Source |
|---|---|---|
| Solar PV installations (all sizes) | 1,030 (10.9 per 1,000 households) | DESNZ, end of 2025 |
| Homes with an EPC rated D to G | 36% | ONS, EPCs lodged to March 2025 |
| Median EPC energy score | 71 (band C) | ONS, EPCs lodged to March 2025 |
| Households on mains gas heating only | 56.2% | Census 2021, ONS |
| Warm Homes: Local Grant, 2025 to 2028 | £53,470,024 to the consortium led by Greater London Authority | DESNZ, list updated July 2026 |
| Electricity network operator | UK Power Networks (London) | NESO licence area boundaries |
London is served by UK Power Networks, the electricity network operator for London. Solar panels have to be registered with the network operator. Your installer normally does this: smaller systems are notified after installation, and larger ones need approval before work starts.
These are published official statistics for the Westminster council area, which covers London, not Home Energy Quotes estimates. Sources checked 6 October 2026.
Is London a good place for solar panels?
London receives an average of 1625 hours of sunshine per year — slightly above the UK average of 1,493 hours. Combined with South East’s energy prices tracking the UK average, solar panels installations here may offer good value (individual results will vary).
London has a population of 8,900,000, and the area falls within the South East region. We recommend getting at least 3 quotes to compare prices.
Find Installers in London
We recommend getting at least 3 quotes from qualified installers before making a decision. Check reviews, ask for local references, and make sure warranties are clearly stated in writing.
What to check before hiring an installer in London
- Qualifications — check the installer holds relevant qualifications and certifications for solar panels before signing any contract
- Local references — ask for completed jobs in London or Greater London
- Reviews — check online reviews before committing
- Warranty — product and workmanship warranties should be clearly stated in writing
- 3 quotes minimum — we recommend comparing at least three quotes to ensure you get a fair price
Questions about solar panels in London
How much do solar panels cost in London?
How many solar panel installations are there in London?
Is there a grant for solar panels in London?
Solar panels in London qualify for 0% VAT until March 2027. In Great Britain, the Smart Export Guarantee pays for surplus electricity you export to the grid, at a rate each supplier sets.
How long is the payback period in London?
Do I need planning permission in London?
How do I find a good installer in London?
Get quotes for your roof in London
Up to three approved installers who cover London may contact you. Free, no obligation.
Solar Panels in nearby towns
Last reviewed: . Costs are modelled estimates from the Home Energy Quotes Cost Index — see how we calculate them. Grant rates are checked against GOV.UK.