Why solar works in Carmarthen
Carmarthen is the county town of Carmarthenshire, with a built-up-area population of 16,455 at the 2021 census and a wider community count of 14,636. Our drive from the FLD Swansea base is 45 minutes. The town sits on the Tywi and has retained both a working market and a substantial public-sector employment base.
PVGIS modelling for SA31 returns typical annual yields of around 965 kWh per kWp installed for a well-oriented rooftop array at 30 to 35 degrees pitch. In practice that means a 4 kWp domestic array generates roughly 3,860 kWh per year, and a 50 kWp commercial rooftop around 48,250 kWh.
Commercial solar in Carmarthen
Bilingual agricultural market town with a 20-mile Welsh-speaking farm catchment. For commercial operators, the combination of a predictable 965 kWh/kWp yield, current commercial electricity prices at 28 to 32p per kWh, and the Annual Investment Allowance tax treatment means simple payback on a well-sized Carmarthen commercial array typically lands between 3.5 and 6 years.
Worked example: 100 kWp commercial installation
- Installed cost: approximately £85,000 to £95,000
- Year-one generation: 96,500 kWh
- Typical self-consumption rate against HH data: 65 to 80 percent
- Simple payback at prevailing electricity pricing: 3.6 to 4.5 years
- Post-tax payback with Annual Investment Allowance: 2.6 to 3.2 years
Typical Carmarthen commercial rooftops
We have installed commercial solar across Parc Pensarn, Cillefwr Industrial Estate in Carmarthen. Typical system sizes range from 30 kWp on smaller trade units to 500 kWp-plus on larger warehouse and factory roofs.
Domestic solar in Carmarthen
For Carmarthen homeowners, a typical domestic installation is a 4 to 5 kWp array paired with a 5 to 10 kWh battery. At 965 kWh/kWp, a 4 kWp system generates around 3,860 kWh in year one, which covers a meaningful share of a three or four-bedroom household's annual consumption once battery storage smooths the time-of-use mismatch. Payback typically lands at 7 to 10 years at current pricing and Smart Export Guarantee tariffs.
Planning and grid connection
The planning authority for Carmarthen is Carmarthenshire CC (county town). Rooftop solar PV on commercial buildings almost always falls within permitted development under the Town and Country Planning (General Permitted Development) (Wales) Order, subject to the usual 200 mm projection limit and non-listed, non-scheduled-monument conditions. Properties inside a conservation area will typically require full planning permission; we handle the application end-to-end.
For grid connection, systems above 3.68 kW per phase require a G99 application to the DNO. Typical approval timelines are 6 to 8 weeks for Type A (up to 1 MW), which we lodge concurrently with design and procurement so they do not sit on the critical path.
Why FLD for your Carmarthen installation
- NICEIC Approved Contractor under a single sign-off for both solar and electrical works
- MCS certified for both PV and battery, which is essential for Smart Export Guarantee eligibility
- Swansea-based, directly employed engineers, not subcontractors, on every site
- Insurance-backed NICEIC warranty plus 25 to 30-year panel performance warranty from tier-1 manufacturers
- Remote monitoring included as standard so generation and performance are visible from day one
Start the conversation
If you own a commercial rooftop or a domestic property in Carmarthen (SA31) and want a realistic assessment against your actual consumption data, call Paul direct on 01792 680611 or visit our Carmarthen location page for full local detail.
