Wales
Solar Panels in South Glamorgan
We connect homeowners across South Glamorgan with MCS-certified solar installers. Cardiff and the Vale of Glamorgan sit on Wales’s sunniest, flattest coastal strip, giving the highest solar yield of any Welsh county.
Solar generation in South Glamorgan
Based on PVGIS irradiance data for Wales, a 4 kWp south-facing system in South Glamorgan generates around 3,900 kWh per year. At the April 2026 Ofgem price cap of 24.50p/kWh, that covers £956 of electricity you would otherwise buy from the grid.
On top of bill savings, surplus energy exported to the grid earns Smart Export Guarantee (SEG) payments — typically 4–6p/kWh with the main suppliers, or up to 15p/kWh with specialist tariffs like Octopus Outgoing.
A typical 4 kWp system with a 5 kWh battery costs £7,000–£11,000 installed across South Glamorgan. At current energy prices, most homeowners break even within 8–10 years.
Local grid: National Grid Electricity Distribution (South Wales)
Solar installations across South Glamorgan connect to the grid via National Grid Electricity Distribution (South Wales). Systems up to 3.68 kW require a G98 notification; larger systems need G99 approval, which can take 45 working days. Your MCS-certified installer handles both — it's included in the installation package, not an extra cost.
About South Glamorgan
That sunny, flat coastal strip is exactly why South Glamorgan has the highest solar yield of any Welsh county. Cardiff Bay's waterfront regeneration and the Wales Millennium Centre overlook the Vale of Glamorgan's Heritage Coast.
Coverage across South Glamorgan
We don't have a dedicated page for an individual South Glamorgan town yet, but our installer network already covers Cardiff, Barry and Penarth and every other town and village across the county — submit a quote request below and we'll match you with MCS-certified installers local to your postcode.
Frequently asked questions — South Glamorgan
What parts of South Glamorgan does your installer network reach?+
We're a matching service covering the whole of South Glamorgan, including Cardiff, Barry and Penarth — plus every smaller town and village in between. We connect you with MCS-certified installers who work across the county, whether or not your specific town already has its own dedicated page on this site.
How much electricity will solar panels generate in South Glamorgan?+
A 4 kWp south-facing system in South Glamorgan generates roughly 3,900 kWh a year, based on PVGIS irradiance data for Wales — worth roughly £956 at the April 2026 Ofgem price cap of 24.50p/kWh. Cardiff and the Vale of Glamorgan sit on Wales’s sunniest, flattest coastal strip, giving the highest solar yield of any Welsh county.
Who is the electricity network operator in South Glamorgan?+
National Grid Electricity Distribution (South Wales) manages the local distribution network across South Glamorgan. Systems up to 3.68 kW need a G98 notification; larger arrays need G99 approval (up to 45 working days) — your MCS-certified installer files both as part of the installation, at no extra cost to you.
How long is the payback period for solar in South Glamorgan?+
A typical 4 kWp system with a 5 kWh battery costs £7,000–£11,000 installed. On South Glamorgan's 975 kWh-per-kWp yield and current energy prices, most homeowners break even within 8–10 years, and Smart Export Guarantee (SEG) payments on surplus exported energy reduce that further.