Commercial solar installers in Penarth

Key facts

Where businesses are in Penarth

• Llandough Trading Estate: A modern industrial estate of 5.34 hectares in Llandough (Penarth), off the A4232, with small to medium terraced units; the council's March 2023 employment land study recommends protecting it.
• West Point Industrial Estate, Llandough: Rows of small modern terraced units on 5.33 hectares beneath a highway overpass off the A4232, described in the council's March 2023 study as almost fully occupied.

Large employers and sectors with sites here include:

• Tourism: A September 2025 council report put tourism in the Vale of Glamorgan at £350.41 million in 2024, up 1.9% on 2023, naming Penarth Pier among the area's main draws.
• Marine leisure (Penarth Marina): Penarth Marina, run by boatfolk, has 320 berths for vessels up to 72ft, with 24 hour staffing and a boatyard.

Large, simple roofs on distribution sheds and modern industrial units are usually the quickest and cheapest to fit. Older mill, factory and workshop buildings can work well too, but often need a structural survey first, and roofs from before 2000 may contain asbestos cement: see asbestos roofs.

Grid connection

Penarth is served by National Grid Electricity Distribution (South Wales licence area). Almost every commercial system needs G99 approval from the network operator before it is switched on, and the question is usually how much the local network can take back. Where export is limited, a G100 export limitation scheme can let a larger array connect. See G99 and DNO applications.

Planning in Penarth

Planning in Penarth is decided by Vale of Glamorgan council under the Welsh rules. Many non-domestic roofs are covered by Welsh permitted development, with conditions, but not within 3 km of an airport or aerodrome or on listed buildings.

Points that come up locally:

• The Penarth Conservation Area was designated in August 1971 and its boundaries amended in 1978 and 1997; it includes the Grade II listed pier and the Grade I listed St Augustine's Church, and an Article 4(2) Direction applies, so many roofs in the town need more care.
• In Wales, panels on a non-domestic building are usually permitted development if they project no more than 200mm from the roof or wall (1 metre above a flat roof) and sit at least 1 metre from the roof edge, but in a conservation area panels on a principal or side elevation wall need planning consent, and a listed building needs planning permission and listed building consent.

Our guides on listed buildings and conservation areas explain what these mean for a solar project.

What a business roof in Penarth could generate

Modelled with PVGIS for the town centre, a south-facing roof at 30 degrees produces about 1,035 kWh per kWp a year.

Illustrative, not a quote: the same sums as our commercial solar calculator. A company paying corporation tax can usually shorten the payback with capital allowances.

Funding and support

• Development Bank of Wales Green Business Loan Scheme: Discounted fixed rate green loans, as part of a funding package with consultancy support, for energy efficiency measures and low carbon projects, with renewables including solar PV listed as typical eligible projects; repayments can start with a capital repayment holiday and the term is tied to the project's payback period. Limited companies, sole traders and partnerships must be based in Wales, have traded for at least two years and have at least one set of filed annual accounts. A grant of up to 50% of the cost of a detailed energy audit, to a maximum of £10,000 (£20,000 total costs), is also offered. Check the scheme's own page for eligibility and closing dates.

National reliefs apply too: see grants and reliefs in Wales.

Solar across Vale of Glamorgan

At the end of 2025, Vale of Glamorgan had 4,474 solar PV installations with 93.6 MW of capacity, up 15% since 2020, according to government figures. The Vale of Glamorgan page has the full local figures and how they compare.

Nearby towns

• Barry, about 4 miles away
• Caerphilly, about 10 miles away
• Weston-super-Mare, about 11 miles away
• Newport, about 13 miles away

Sources

• ons.gov.uk: census2021
• ons.gov.uk: datadownload.xlsx
• valeofglamorgan.oc2.uk: BP12 Employment Land Study (BE Group) full
• bromorgannwg.gov.uk: Annual Tourism and Events Update
• boatfolk.co.uk: annual berthing
• businesswales.gov.wales: enterprise zones
• gov.uk: growth and local jobs top of the agenda
• gov.uk: maps of uk freeports
• valeofglamorgan.gov.uk: Penarth CAAMP July 2011
• gov.wales: planning permission solar panels non domestic
• developmentbank.wales: green
• Yield: PVGIS 5.3 (European Commission Joint Research Centre), SARAH3 data, 14% system losses, for the town centre, modelled 4 November 2026.
• Council area figures: DESNZ, renewable electricity by local authority 2014 to 2025.