Commercial solar installers in Holyhead

Key facts

Where businesses are in Holyhead

• Prosperity Parc: The former Anglesey Aluminium site at Holyhead, where Stena Line plans a low carbon campus of about 200,000 sq m of data centre, industrial and office space on some 220 acres; outline planning permission was granted in July 2025 and the site is a Freeport tax site.
• Parc Cybi: Business park south of Holyhead off junction 2 of the A55, zoned for commercial use, with land zoned for B1, B2 and B8 uses and a truck stop. The Welsh Government built a border control post there to inspect goods arriving through the Port of Holyhead.

Large employers and sectors with sites here include:

• Ferry port (Stena Line, Port of Holyhead): In October 2023 the Welsh Government said Holyhead was the UK's busiest Irish Sea port for accompanied roll on roll off freight and supported around 700 local jobs, as it committed £40m towards refurbishing the 2.4km breakwater that protects the port.
• Cruise tourism: Holyhead, which can take ships up to 300 metres long, handled 55 of the 84 cruise ships that visited Wales in 2025.

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.

Enterprise, investment and freeport zones

• Anglesey Freeport: The Anglesey Prosperity Zone tax site, made up of Prosperity Parc (the former Anglesey Aluminium site) and Parc Cybi at Holyhead, was designated from 23 January 2025; Welsh Freeport tax reliefs run until 30 September 2034. The Freeport says details of its customs site will follow.
• Anglesey Enterprise Zone: Business Wales still lists Anglesey as one of Wales's eight Enterprise Zones. Its twelve sites include the Port of Holyhead, Parc Cybi, the former Anglesey Aluminium site and Penrhos Industrial Estate, and it offers tailored Welsh Government business support rather than a set tax relief.

These zones can bring business rates relief or enhanced capital allowances for eligible firms on qualifying sites; check the current terms with the zone before relying on them.

Grid connection

Holyhead is served by SP Energy Networks (SP Manweb, Merseyside and North 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 Holyhead

Planning in Holyhead is decided by Isle of Anglesey 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:

• Holyhead has three of Anglesey's 12 conservation areas: Holyhead Central, Holyhead Mountain and Holyhead/Newry Beach, so check whether a building is inside one before planning roof panels in the centre or near the seafront.
• Welsh Government guidance says solar panels on non-domestic buildings can be permitted development if they project no more than 200mm from the roof (1 metre above a flat roof) and sit at least 1 metre from the roof edge; listed buildings need consent, and in conservation areas panels on principal or side elevations visible from the highway need planning consent.

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

What a business roof in Holyhead could generate

Modelled with PVGIS for the town centre, a south-facing roof at 30 degrees produces about 1,045 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: Loans of £1,000 to £1.5m at a discounted fixed interest rate (never below 3%) for energy efficiency and low carbon projects, with solar PV listed as a typical eligible project. Businesses must be based in Wales and have traded for at least two years with at least one set of filed accounts. A grant of up to 50% of the cost of a detailed energy audit, to a maximum of £10,000, 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 Isle of Anglesey

At the end of 2025, Isle of Anglesey had 6,812 solar PV installations with 108.4 MW of capacity, up 197% since 2020, according to government figures. The Isle of Anglesey page has the full local figures and how they compare.

Nearby towns

• Caernarfon, about 19 miles away
• Llandudno, about 33 miles away
• Porthmadog, about 34 miles away
• Colwyn Bay, about 37 miles away

Sources

• ons.gov.uk: census2021
• ons.gov.uk: datadownload.xlsx
• wales247.co.uk: stena line announces plans for the future of
• angleseyfreeport.co.uk: location and sites e
• gov.wales: parc cybi holyhead border control post common questions
• coark.com: development plots parc cybi parc cybi holyhead
• gov.wales: welsh government invest 40m refurbish breakwater and secure
• wales247.co.uk: wales cruise tourism doubles as ship visits soar
• gov.uk: maps of anglesey freeport tax sites
• assets.publishing.service.gov.uk: 0.8 Anglesey Prosperity Zone black white
• anglesey.gov.wales: anglesey freeport moves into delivery phase as partners
• gov.uk: extension to freeport and investment zones special tax
• businesswales.gov.wales: enterprise zones
• businesswales.gov.wales: anglesey enterprise zone
• anglesey.gov.wales: Where are the conservation areas
• gov.wales: planning permission solar panels non domestic
• developmentbank.wales: green
• developmentbank.wales: Green Business Loan Fund campaign guide Eng final
• 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.