Solar Panels in Wales
Wales splits into a wetter, hillier north and mid-Wales and a more built-up, slightly sunnier south along the M4 corridor. SP Energy Networks covers the north and mid-Wales grid; National Grid Electricity Distribution covers South Wales.
Solar generation in Wales
Averaged across Wales's 8 counties, a 4 kWp south-facing system generates around 3,744 kWh per year. At the April 2026 Ofgem price cap of 24.50p/kWh, that covers £917 of electricity you would otherwise buy from the grid — though South Glamorgan runs ahead of that average, at 975 kWh per installed kWp per year.
A typical 4 kWp system with a 5 kWh battery costs £7,000–£11,000 installed. At current energy prices, most homeowners in Wales break even within 9–11 years, and Smart Export Guarantee (SEG) payments on surplus exported energy reduce that further.
About Wales
North and mid-Wales' mountainous Eryri (Snowdonia) and Powys uplands contrast with the busier, sunnier M4 corridor running through Cardiff, Newport and Swansea in the south. SP Energy Networks (SP Manweb) covers the north and mid-Wales grid, while National Grid Electricity Distribution runs South Wales — two separate licence areas within one nation, each with their own connection timelines.
Counties we cover in Wales
Not every town in Wales has its own dedicated page yet — but our installer network already covers every county above. Submit a free quote request and we'll match you with MCS-certified installers local to your postcode.
Frequently asked questions — Wales
Do you cover the whole of Wales, or just certain towns?+
We cover every county in Wales — Clwyd, Dyfed, Gwent, Gwynedd, Mid Glamorgan, Powys, South Glamorgan and West Glamorgan. None of them have a dedicated town page yet, but our installer network reaches every county regardless.
How much electricity will solar panels generate in Wales?+
Averaged across Wales's counties, a 4 kWp south-facing system generates around 3,744 kWh per year — worth roughly £917 at the April 2026 Ofgem price cap of 24.50p/kWh. Yield varies by county: South Glamorgan sees the highest generation in the region at 975 kWh per installed kWp per year.
Who runs the electricity network in Wales?+
Wales splits across 2 network operators depending on county: SP Energy Networks (SP Manweb) and National Grid Electricity Distribution (South Wales). Whichever applies to your postcode, your MCS-certified installer handles the G98/G99 grid notification as part of the installation, at no extra cost.
How long is the payback period for solar in Wales?+
A typical 4 kWp system with a 5 kWh battery costs £7,000–£11,000 installed. On Wales's average yield and current energy prices, most homeowners break even within 9–11 years, and Smart Export Guarantee (SEG) payments on surplus exported energy reduce that further.
Other UK regions we cover
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