Solar Panels Carmarthen: Costs, Savings & Local Data
How much can solar panels save you in Carmarthen?
A typical 4kW solar panel system in Carmarthen generates around 3,840 kWh per year, saving you approximately £587 annually on electricity bills and export payments. With 1,520 hours of sunshine per year, most Carmarthen homeowners see payback within 10–13 years.
Carmarthen receives around 1,520 hours of sunshine each year. A typical 4kW solar panel system here can generate approximately 3,840 kWh annually, providing meaningful savings on your electricity bills and reducing your household's carbon footprint.
Carmarthen receives around 1,520 hours of sunshine per year. Wales' oldest town has a mix of period properties and modern developments. The surrounding Carmarthenshire countryside has many off-gas farmhouses where solar is particularly valuable.
Solar panel key figures for Carmarthen
1,520 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 Carmarthen price
Solar panel output and savings by system size in Carmarthen
Generation and savings below are modelled for Carmarthen'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 Carmarthen 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 Carmarthen: 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 Carmarthen
Solar panels in nearby areas
Showing areas near Carmarthen. Solar conditions vary by location.
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