Commercial building solar panels across Gwynedd
We arrange roof surveys on offices, retail units, hotels and leisure buildings throughout Gwynedd, model what each roof can carry against the building's own consumption, and arrange the design, the grid application and the install through our MCS-certified partner.
- Modelled yield
- 781 kWh/kWp/yr
- Mean across Gwynedd towns, EU PVGIS v5.2
- Network operator
- SP Energy Networks
- G99 applications and export limits
- Commercial stock
- 790 office / 1,610 retail
- VOA rating list, March 2025
- Commercial rooftop schemes
- 0 on record
- REPD Q1 2026, districts we cover
- Towns covered
- 6
- Surveys arranged county wide
What the data says about Gwynedd
Modelled yield varies across Gwynedd: Pwllheli comes out at 887 kWh per kWp a year against 704 at Bethesda. On a 210 kWp commercial roof that gap is about 38,430 kWh a year.
Across the authority our Gwynedd towns sit in, the Valuation Office Agency lists 790 office and 1,610 retail properties, 40 of them large-format stores and retail warehouses. Source: Valuation Office Agency, Non-domestic rating: business floorspace, 31 March 2025 (published December 2025), counts and floorspace by special category code and local authority district, England and Wales.
The planning database records no roof-mounted commercial schemes in the districts we cover in Gwynedd. That usually means arrays have gone in below its reporting threshold, not that none exist: many commercial roofs carry less than a megawatt and never appear.
Connections across the county run through SP Energy Networks. Anything above 3.68 kW per phase needs a G99 application, and the export limit offered shapes the design, so the question is asked before the array is sized.
- Bangor 733 kWh/kWp
- Bethesda 704 kWh/kWp
- Caernarfon 798 kWh/kWp
- Dolgellau 746 kWh/kWp
- Porthmadog 820 kWh/kWp
- Pwllheli 887 kWh/kWp
Book a survey in Gwynedd
Send the postcode, the rough footprint and whether you own or lease the building. We come back with what the roof can carry, what it would generate against your consumption, and what the funding routes look like.