Solar Panels Swansea: Costs, Savings & Local Data
How much can solar panels save you in Swansea?
A typical 4kW solar panel system in Swansea generates around 3,840 kWh per year, saving you approximately £587 annually on electricity bills and export payments. With 1,540 hours of sunshine per year, most Swansea homeowners see payback within 10–13 years.
A typical 4kW solar system in Swansea can save you around £587 per year on electricity bills, with a payback period that makes it a strong long-term financial investment. Combined with the Smart Export Guarantee and 0% VAT, the financial case for solar in Swansea is compelling.
Swansea receives around 1,540 hours of sunshine per year, sitting on the south Wales coast overlooking Swansea Bay. The city benefits from its south-facing coastal aspect, which helps solar panels perform well. Housing ranges from Victorian terraces in Uplands and Sketty to modern estates in Killay and Dunvant. The Gower Peninsula to the west gives Swansea a reputation for outdoor living, and homeowners across the city are increasingly adopting solar as a practical way to reduce energy costs.
Solar panel key figures for Swansea
1,540 hrs
Annual sunshine hours
HSG regional figure — no primary source recorded
3,840 kWh
Annual generation (4kW)
Based on 960 kWh/kWp yield
£587
Annual savings (4kW)
At 26.11p/kWh + SEG
~12 years
Estimated payback
£7,120 national DESNZ median, not a Swansea price
Solar panel output and savings by system size in Swansea
Generation and savings below are modelled for Swansea's location, using a regional solar yield of 960 kWh/kWp on a south-facing roof with no shading.
The installed cost column is a national figure, not a Swansea price. It is the DESNZ median of £1,780.25 per kW for systems up to 4 kW, derived from the MCS Installation Database and covering England, Scotland and Wales. No official dataset publishes installed costs at city level, and we will not imply one exists. Half of real installations cost more than the median.
| System Size | Panels | Cost | Annual Saving | Payback |
|---|---|---|---|---|
| 3 kW | ~8 panels | £5,340 | £441 | ~12 years |
| 4 kW | ~10 panels | £7,120 | £588 | ~12 years |
| 5 kW | ~13 panels | £8,480 | £735 | ~12 years |
Solar energy in Swansea: local context
Wales benefits from the Welsh Government's active support for renewable energy. The varied landscape means solar performance differs between the sunnier south coast and the hillier inland areas, but most Welsh homes can benefit from solar.
Welsh homeowners may benefit from additional support through the Welsh Government's energy schemes, alongside the UK-wide Smart Export Guarantee and 0% VAT.
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Frequently asked questions about solar panels in Swansea
Solar panels in nearby areas
Showing areas near Swansea. Solar conditions vary by location.
Ready to see what solar could save you?
Get free, no-obligation quotes from MCS-certified installers in your area.
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