Key facts
| Council area | Monmouthshire |
| Population | 13,695 (Abergavenny built-up area, usual residents, Census 2021 (ONS, rounded to the nearest five)) |
| Network operator | National Grid Electricity Distribution (South Wales) |
| Main employment areas | Mill Street Industrial Estate; Union Road; Westgate Business Park, Llanfoist |
| Indicative yield | About 977 kWh per kWp a year (south facing, 30 degrees) |
| Nation support page | Grants and reliefs in Wales |
Where businesses are in Abergavenny
- Mill Street Industrial Estate: A protected employment site of 2.13 hectares, fully developed, about half a mile south of the town centre; occupiers include Screwfix and Plumb Centre, and it is marketed as the town's leading trade counter location.
- Union Road: A protected employment site of 3.53 hectares near Nevill Hall Hospital, fully developed with established industrial and warehouse uses, including a small recycling depot with an adjacent array of PV panels completed in 2016 to 2017.
- Westgate Business Park, Llanfoist: An allocated industrial and business site of 5 hectares across the river in Llanfoist, largely developed with a hotel, pub, food outlets and a care home; about 1.3 hectares was still undeveloped at the council's March 2023 survey.
Large employers and sectors with sites here include:
- Healthcare (Nevill Hall Hospital): Nevill Hall is one of Aneurin Bevan University Health Board's three Enhanced Local General Hospitals, and in June 2025 the board opened an engagement on how services there should develop alongside the Grange University Hospital.
- Food and tourism (Abergavenny Food Festival): Started in 1999 by two local farmers, the festival is held on the third weekend in September (19 and 20 September in 2026) with over 200 exhibitors across the Market Hall, the Brewery Yards and Abergavenny Castle.
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
Abergavenny is served by National Grid Electricity Distribution (South Wales). 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 Abergavenny
Planning in Abergavenny is decided by Monmouthshire 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 Abergavenny Conservation Area, designated on 5 June 1970, covers about 164.4 hectares, so check whether a building is inside it before planning roof panels.
- 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), but in a conservation area panels on a principal or side elevation wall visible from the road 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 Abergavenny could generate
Modelled with PVGIS for the town centre, a south-facing roof at 30 degrees produces about 977 kWh per kWp a year.
| Item | Illustrative figure |
|---|---|
| System | 100 kWp, south facing at 30 degrees |
| Installed cost | £900 per kWp, so £90,000 excluding VAT |
| Generation | About 97,700 kWh a year |
| Used on site | 70% at 24p = £16,414 saved |
| Exported | 30% at 5p = £1,466 earned |
| Total a year | About £17,879 |
| Simple payback | About 5.0 years before tax relief |
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 interest rate loans for energy efficiency measures and low carbon projects, with renewables including solar PV listed as typical eligible projects. 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 Monmouthshire
At the end of 2025, Monmouthshire had 6,145 solar PV installations with 93.2 MW of capacity, up 19% since 2020, according to government figures. The Monmouthshire page has the full local figures and how they compare.
Nearby towns
- Pontypool, about 8 miles away
- Ebbw Vale, about 9 miles away
- Cwmbran, about 12 miles away
- Bargoed, about 13 miles away
Sources
- ons.gov.uk: census2021
- ons.gov.uk: datadownload.xlsx
- monmouthshire.gov.uk: Employment Land Background Paper 2022 2023
- cronfaddataeiddo.busnes.llyw.cymru: Mill Street Industrial Estate Unit 13 Mill Street
- abuhb.nhs.wales: have your say the future of local hospital
- tfw.wales: abergavenny food festival
- heritagecheck.co.uk: abergavenny
- 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.
Frequently asked questions
Who is the electricity network operator in Abergavenny?
National Grid Electricity Distribution (South Wales). Most commercial solar systems need its G99 approval before they are switched on. The operator follows the postcode, so confirm yours with the Energy Networks Association postcode tool.
How much would a 100 kWp solar system generate in Abergavenny?
About 97,700 kWh a year for a south-facing roof at 30 degrees, modelled with PVGIS for the town centre. At 70% used on site at 24p and the rest exported at 5p, that is worth about £17,879 a year. Your own roof, orientation and use will change this.
Can a business in Abergavenny get a free solar survey?
Yes. Answer six short questions and we match the site with one MCS certified installer, who surveys it on site or by video call. It is free, with no obligation. Get a free survey.
Related pages
- Monmouthshire6,145 installations, 93.2 MW of solar and about 992 kWh per kWp a year for a south-facing roof.
- WalesNGED and SP Energy Networks connections, Planning Policy Wales and Welsh permitted development, the Welsh rates exemption to 2035, and farm, factory and port roofs.
- Commercial solar calculatorEstimate commercial solar savings and payback, with the generation, price and cost assumptions shown and sourced, and the limits of a simple estimate explained.
- WalesCurrent solar support in Wales for businesses, farms, public bodies and community groups, with rates, planning and official contacts.
- Planning permissionPermitted development for commercial rooftop solar and car park canopies in England, prior approval, heritage limits, ground-mounted schemes and the other UK nations.