Solar installers in Cardiff.

Sun figures from PVGIS; roof estimates include solar data from Google. How we measure.

Local context

Solar in Cardiff: quick guide.

Cardiff has good solar fundamentals — South Wales gets more sun than much of the country, and the city's housing is mostly straightforward to fit. The main local nuance is the split between dense Victorian terraces in the inner city and the more open suburban and valleys stock beyond it.

A few Cardiff-specific things worth knowing:

• Solid southern light. The CF area sits above the UK average for irradiation — a well-oriented roof here produces more than the same roof in the north.
• Inner-city terraces. Cathays, Roath and Grangetown are terrace country, where the street's direction sets the system. East or west still works well.
• Conservation areas. Parts of the centre, Llandaff and the older suburbs are conservation areas; listed or street-visible roofs there can need consent.
• Suburbs and valleys. The outer suburbs and the valley towns have more open, simple roofs that suit a full-sized system and battery.
• Battery storage. With time-of-use tariffs spreading, it's worth running the numbers through the savings calculator.

Grants & support

What help is available in Cardiff?

Solar and battery installations across the UK are currently zero-rated for VAT until 31 March 2027 — a straight saving on the installed price for every household, with no application needed. In Wales, the Welsh Government's Nest scheme supports eligible households with home-energy improvements, alongside the GB-wide schemes.

Eligibility for grant schemes depends on your income, home and circumstances, and the schemes change. We keep the current picture on one page rather than guess what you'll qualify for.