Solar Panel Installation in Cardiff
Cut your electricity bills by up to 90% with premium solar & battery, expertly installed across Cardiff and South Wales — from Penarth to Barry, Llandaff to Roath.
Big Solar Savings for Cardiff Homes
Solar panels generate electricity from both direct sunlight and the diffuse daylight that reaches them through clouds. They produce more power in bright sunlight, but they still work on cloudy days. A battery can store daytime generation for the evening.
With energy bills climbing everywhere, a Spark system locks in decades of lower, more predictable costs for Cardiff homeowners — backed by savings we validate independently through EPVS.
Solar Generation in Cardiff
Cardiff sits in South Wales, which sees around 1,400 hours of sunshine a year — healthy daylight totals that make solar genuinely worthwhile. Many local homes are traditional pitched-roof terraces and semis that suit panel layouts well — we just check for conservation-area rules first. Across neighbourhoods like Penarth, Barry and Llandaff, a well-designed system with battery storage turns that daylight into lower bills all year round.
Figures are regional averages for guidance, based on typical MCS/PVGIS irradiance for South Wales. Your exact generation depends on your roof orientation, pitch and shading, and is confirmed at your free survey.
Areas We Cover Around Cardiff
We install right across the city and surrounding South Wales. Don't see your area? We almost certainly still cover it.
Spark Installs Around Cardiff
Explore Spark solar & battery installations across Cardiff and the surrounding area. Pins show installation totals at approximate postcode district centres, not individual homes.
Spark’s records show 129 installations within 25 miles of central Cardiff, including the postcode districts closest to the centre: CF23 (2), CF5 (3), CF64 (2), CF3 (1), CF15 (1), CF63 (1) (as of September 2026).
Solar in Cardiff: Your Questions
Do solar panels work well in Cardiff?
Solar panels generate electricity from both direct sunlight and the diffuse daylight that reaches them through clouds. They produce more power in bright sunlight, but they still work on cloudy days. A battery can store daytime generation for the evening.
How much can I save in Cardiff?
Most homeowners cut their electricity bills by up to 90%. Your EPVS-validated savings estimate is calculated after a free home survey based on your roof and usage. Savings are forecasts, not guaranteed amounts.
Do you cover my part of Cardiff?
We install right across Cardiff and the wider region. If your area isn't listed, get in touch — we almost certainly still cover it.
How long does installation take?
Most Cardiff installations are completed in a single day. Across our installs, the median time from signing to install day is 19 days, depending mainly on the size of your inverter: see how long installation takes.
How much electricity will solar panels generate in Cardiff?
In South Wales you can expect around 915 kWh a year for every kWp installed, so a typical 4 kWp Cardiff system generates roughly 3,650 kWh annually — enough to cover a large share of a household’s electricity, especially paired with a battery.
Do I need planning permission for solar in Cardiff?
For most Cardiff homes solar is permitted development and needs no application. In a conservation area or on a listed building extra rules can apply — we check this for you and fit a discreet, all-black array to suit.
What Spark Customers Say
“Very professional and friendly from start to finish. They explained everything, turned up on time, respected my property and took all the packaging away.”
“Everyone was extremely polite and courteous. The work was completed promptly with consultation at every stage. Excellent service start to finish.”
“No hard sell — just a clear, honest explanation of exactly what we needed. The scaffolders and installers were great, and any minor issue was resolved quickly.”
Get Your Free Cardiff Solar Quote
A local Spark expert will design your system and confirm your savings — no obligation, no pushy sales.
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