Solar Panels in the SA31 Postcode Area
The SA31 postcode area covers Carmarthen and surrounding areas in Carmarthenshire. A typical 4kWp solar panel system here generates around 3,488 kWh per year, saving an estimated £977/yr on electricity bills and covering roughly 92% of average household electricity usage.
Solar Performance in SA31
About Solar in SA31, Carmarthen
Homeowners in the SA31 postcode area are eligible for 0% VAT on solar panel installations, making 2026 an excellent time to invest in solar energy. With 872 kWh generated per kWp of installed capacity, the SA31 area benefits from near-average solar irradiance for the UK.
Through the Smart Export Guarantee (SEG), you can also earn money by exporting surplus electricity back to the grid. Most MCS-certified installations in Carmarthenshire qualify for SEG payments from energy suppliers.
Carmarthenshire in Wales generates 870 kWh per kWp, about 5% below the UK average of 920 kWh/kWp. As the largest region in Wales, Carmarthenshire stretches from the Brecon Beacons to Carmarthen Bay, and its southern coastal strip enjoys notably better solar conditions than its upland interior.