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Solar panel and battery installers in Cardiff
Keiron holds the OVO partnership for South Wales, and Cardiff sits in their CF postcode patch. Book a free 45 minute video design and you get your roof layout, your numbers and a written quote, with nobody setting foot in your home.
What solar actually does in Cardiff
Roofs in Cardiff come in every shape: terraces, semis and detached streets, often on the same road. That variety is what the remote design process is built for. Keiron's team looks at your actual roof on satellite and aerial imagery, live on a free 45 minute video call, and sizes the system to it. PVGIS puts Cardiff at 1,024 kWh per kWp a year, so a full 14 panel (6.3 kWp) roof here generates around 6,451 kWh a year.
Yield and peak sun hours are PVGIS estimates for Cardiff's own coordinates, not a regional average. Your free design refines them for your actual roof.
Get your free quote from Keiron
Two minutes. We confirm your video slot within one working day.
Worth reading before your Cardiff design call
Straight answers from the OVO Solar and Battery team, sourced and dated.
Cloudy days and north facing roofs, answered honestly
Cloud reduces output, it does not switch it off. North facing depends on pitch more than compass.
Read the guide →Why filling the roof first time is cheaper than adding later
Half covering a roof is the expensive choice. The fixed costs are the whole argument.
Read the guide →A home battery without solar panels, honestly assessed
A battery with no panels still earns every night. Here is how much, and where it does not stack up.
Read the guide →How much a home battery saves, unit by unit
What a battery saves per unit, per night and per year, with the losses taken off.
Read the guide →Which export rate can you actually qualify for?
The gate behind every headline rate, and the six things to check before you believe one.
Read the guide →How the Smart Export Guarantee actually works
What the scheme is, who qualifies, and how the money actually reaches you.
Read the guide →Solar installers near Cardiff
We also cover Penarth, Dinas Powis, Caerphilly, Barry, Church Village and Rogerstone.
See Keiron's full South Wales coverage →Independent solar guidance for Cardiff from Clearline Home Energy
Generation figures are PVGIS v5.2 estimates retrieved August 2026 for the coordinates of Cardiff, assuming a south-facing roof at a 35 degree pitch with no significant shading, the same assumptions as the regional figures on this site. Population is the House of Commons Library settlement classification figure. Your free design accounts for your actual orientation, pitch and shading.