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 £556 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 £556 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
Met Office / PVGIS regional data
3,840 kWh
Annual generation (4kW)
Based on 960 kWh/kWp yield
£556
Annual savings (4kW)
At 24.5p/kWh + SEG
~12 years
Estimated payback
Based on average 4kW system cost
Solar panel savings by system size in Swansea
The table below shows estimated costs, annual savings, and payback periods for different solar panel system sizes in Swansea. Figures are based on a south-facing roof with no shading, using Swansea's regional solar yield of 960 kWh/kWp.
| System Size | Panels | Cost | Annual Saving | Payback |
|---|---|---|---|---|
| 3 kW | ~8 panels | £4,500–£6,500 | £418 | ~13 years |
| 4 kW | ~10 panels | £5,500–£8,000 | £557 | ~12 years |
| 5 kW | ~13 panels | £6,500–£9,500 | £696 | ~11 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.
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