Solar panels in Swansea
£3,500 to £10,940 installed, 1,555 hours of sun a year, and 6,669 installations already in the council area.
What a system costs in Swansea
3kWp
£3,500–£4,740
Saves up to £389 a year. Pays back in about 11 years.
4kWp (most common)
£5,030–£7,550
Saves up to £613 a year. Pays back in about 10 years.
6kWp
£7,600–£10,940
Saves up to £876 a year. Pays back in about 11 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.
Swansea in numbers
Published statistics for the Swansea council area, not our estimates.
At the end of 2025 there were 6,669 solar PV installations in the Swansea council area, about 63.5 for every 1,000 households, with 74.8 MW of capacity between them. The count covers every size of installation, on homes and businesses. 53% of homes with an EPC in the Swansea council area are rated D to G, and the median energy score is 68, which is band D.
| Swansea council area | Figure | Source |
|---|---|---|
| Solar PV installations (all sizes) | 6,669 (63.5 per 1,000 households) | DESNZ, end of 2025 |
| Homes with an EPC rated D to G | 53% | ONS, EPCs lodged to March 2025 |
| Median EPC energy score | 68 (band D) | ONS, EPCs lodged to March 2025 |
| Households on mains gas heating only | 80.3% | Census 2021, ONS |
| Electricity network operator | National Grid Electricity Distribution (South Wales) | NESO licence area boundaries |
Swansea is served by National Grid Electricity Distribution, the electricity network operator for South Wales. 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 Swansea council area, which covers Swansea, not Home Energy Quotes estimates. Sources checked 6 October 2026.
Is Swansea a good place for solar panels?
Swansea receives an average of 1555 hours of sunshine per year — slightly above the UK average of 1,493 hours. Combined with Wales’s energy prices tracking the UK average, solar panels installations here may offer good value (individual results will vary).
Swansea has a population of 241,000, and the area falls within the Wales region. We recommend getting at least 3 quotes to compare prices.
Find Installers in Swansea
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 Swansea
- Qualifications — check the installer holds relevant qualifications and certifications for solar panels before signing any contract
- Local references — ask for completed jobs in Swansea or West Glamorgan
- 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 Swansea
How much do solar panels cost in Swansea?
How many solar panel installations are there in Swansea?
Is there a grant for solar panels in Swansea?
Solar panels in Swansea 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 Swansea?
Do I need planning permission in Swansea?
How do I find a good installer in Swansea?
Get quotes for your roof in Swansea
Up to three approved installers who cover Swansea may contact you. Free, no obligation.
Swansea on the map
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.