Solar panels Llanelli: Trostre, Tata Tinplate, and the SA14 commercial rooftop market
Commercial solar yields, major employers, business parks, and worked payback figures for Llanelli and the SA14 to SA16 postcodes in Carmarthenshire.
5 min
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Commercial Solar
Commercial Solar PV in South Wales
From 30 kWp factory rooftops to 1 MW ground-mount arrays -- NICEIC and MCS-certified installation, DNO management, and ongoing monitoring from FLD's Swansea base.
- System range
- 30 kWp – 1 MW
- Typical payback
- 2.5 – 4 yrs
- Solar yield
- 940–985 kWh/kWp
- Post-tax IRR
- 22–28%
NICEIC Approved Contractor
MCS Certified
ConstructionLine Accredited
SSIP
35 Years Experience
Solar PV Specialists
PPA Finance Available
The economic case
Full commercial solar PV service page
Why South Wales commercial solar pays back
South Wales receives 940 to 985 kWh per kWp per year according to PVGIS irradiation data -- materially similar to London and significantly higher than Manchester. Paired with commercial grid electricity at 28 to 32p/kWh in 2025-26, the economic case for rooftop PV is straightforward.
A 100 kWp commercial system installed in South Wales typically generates 95,000 kWh annually, producing a year-one benefit of approximately £23,000 and a simple payback of 3.5 years. With 100% Annual Investment Allowance full-expensing against corporation tax, post-tax payback drops to 2.5 years.
For businesses that cannot or do not wish to deploy capital, a fully-funded Power Purchase Agreement installs the system at zero upfront cost and charges only for the electricity generated, at a fixed unit rate guaranteed below your grid tariff.
Finance routes
Commercial Solar PPA
Zero upfront cost
A Power Purchase Agreement lets your business install solar with no capital outlay. We fund the system and you buy the electricity it generates at a fixed, RPI-indexed unit rate that is lower than your grid tariff. Typical terms are 10 to 25 years, with a buy-out option at the end.
Self-Finance Contract
Buy outright, own from day one
Purchase the system outright and claim 100% first-year Annual Investment Allowance relief under current rules. Post-tax payback is typically 2.5 to 4 years for commercial rooftop solar in South Wales.
Asset Finance
Spread payments over 3 to 7 years
Hire purchase or lease structures for businesses that want ownership without a one-off capital hit. We work with established UK asset-finance lenders.
Pitched-roof installation in progress
Longi panel and rail detail
Services
Commercial solar services
Commercial Solar PV Installation
Factory, warehouse and commercial rooftop solar from 30 kWp to 1 MW across Swansea, Cardiff, Newport, Pembrokeshire and the wider South Wales region.
Learn moreCommercial Solar PPA in Wales: Zero Upfront Cost
Install up to 1 MW of rooftop or ground-mount solar on your business premises with no capital outlay. Buy the electricity at a fixed rate below your grid tariff.
Learn more Sectors
Commercial solar by sector
Sector-specific worked examples, grant guidance, and economic models for each type of Welsh commercial operator.
Commercial Solar for Factories in South Wales
Factory-scale rooftop and ground-mount solar from 100 kWp to 1 MW, for manufacturing, refining and tier-2 supply-chain tenants across South Wales.
Sector guideCommercial Solar for Warehouses in South Wales
Warehouse-scale rooftop solar on ballasted flat-roof systems, 300 kWp to 2 MW, targeted at the M4 logistics corridor.
Sector guideCommercial Solar for Farms in Wales
Dairy, beef, arable, poultry and grain-drying solar across Carmarthenshire, Pembrokeshire, Powys and Ceredigion.
Sector guideCommercial Solar for Schools in Wales
Solar for Welsh primary and secondary schools and further-education colleges, funded through Salix Wales and Welsh Government Green Growth schemes.
Sector guideCommercial Solar for Hotels in Wales
Coastal Wales hotel solar with summer-peak demand matching, in-roof integrated systems for conservation areas and AONB sites.
Sector guideCommercial Solar for Offices in South Wales
Cardiff, Swansea and Newport office rooftop solar from 40 to 120 kWp, PPA-friendly for split-ownership buildings.
Sector guideIndustrial Solar PV in South Wales
Heavy industrial solar 1 MW and above, for Port Talbot Transition Board tenants, Milford Haven energy cluster, and the Celtic Freeport footprint.
Sector guideCommercial Solar for Nurseries and Childcare Settings in Wales
Rooftop solar for day nurseries, pre-school settings and childcare providers across Wales, sized 10 to 50 kWp with funding routes through Ynni Cymru, Flying Start infrastructure programmes and Development Bank of Wales.
Sector guide From the blog
Commercial solar guides
Solar panels Porthcawl: coastal hospitality, Trecco Bay and the CF36 market
Payback models, in-roof planning guidance and hospitality sector solar analysis for Porthcawl and the CF36 postcode in Bridgend County Borough.
5 min
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Solar panels Milford Haven and Pembroke: Celtic Freeport, energy port and SA73 opportunities
Commercial solar for the Milford Haven energy cluster: Celtic Freeport tax advantages, LNG supply-chain decarbonisation, and payback models for SA71 to SA73.
5 min
Read
Commercial solar Ammanford and Cross Hands: distribution rooftops and the SA18 market
Payback models, grant routes and business park analysis for commercial solar in Ammanford, Cross Hands and the SA18 distribution corridor in Carmarthenshire.
5 min
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