Why solar works in Swansea
Swansea is our home city and the base from which every FLD project is run. With a population of 251,304 at the 2021 census, it is the second city of Wales and the administrative seat of the City and County of Swansea. The local economy pivots around Swansea University, Morriston Hospital under Swansea Bay UHB, Admiral, the DVLA headquarters in Morriston, the City Council itself and Swansea City AFC.
PVGIS modelling for SA1 returns typical annual yields of around 950 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 3,800 kWh per year, and a 50 kWp commercial rooftop around 47,500 kWh.
Commercial solar in Swansea
Copperopolis industrial heritage and Lower Swansea Valley reclamation. For commercial operators, the combination of a predictable 950 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 Swansea 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: 95,000 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 Swansea commercial rooftops
We have installed commercial solar across SA1 Waterfront, Swansea Enterprise Park, Kingsway Innovation Corridor and other industrial estates in Swansea. Typical system sizes range from 30 kWp on smaller trade units to 500 kWp-plus on larger warehouse and factory roofs.
Domestic solar in Swansea
For Swansea homeowners, a typical domestic installation is a 4 to 5 kWp array paired with a 5 to 10 kWh battery. At 950 kWh/kWp, a 4 kWp system generates around 3,800 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 Swansea is City and County of Swansea. 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 Swansea 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 Swansea (SA1) and want a realistic assessment against your actual consumption data, call Paul direct on 01792 680611 or visit our Swansea location page for full local detail.
