Solar panels in Swansea

Swansea council area had 238,490 residents at the 2021 census. This page sets out the local facts so you can judge a solar quote with confidence.

Solar Cymru does not install panels. We are an independent guide that refers enquiries to MCS-certified installers, so the advice below stays neutral.

Expected output on a Swansea roof

The PVGIS tool models a south-facing roof at 35 degrees in Swansea at about 1,010 kWh a year for each kWp. A 4 kWp system would therefore make around 4,000 kWh. That is a little under Cardiff and a little over the Wrexham figure.

Direction and shade shift those numbers. For example, an east-west split loses 15 to 20 percent against due south but spreads output across the day. Our solar yield guide for Wales explains the trade-off.

Birds can nest under panels, so ask your installer about protection early. Read our advice on bird-proofing solar panels before you agree to any netting. Welsh law protects wild birds and active nests, so netting must never cover a nest in use.

Planning and heritage checks with Swansea Council

Swansea Council decides planning questions across the area. Panels on a house roof usually need no application. They must stay within 20 cm of the roof slope and below the roof’s highest point. Installers also have to site them to limit the effect on the building and the area.

Cadw’s dataset records 31 conservation areas in the Swansea planning area. Inside one, a wall that fronts a highway needs planning permission before panels go on it. Meanwhile, an Article 4 direction can remove permitted development rights, so search the council planning register for your street.

Flats and leasehold homes need extra care. Ask the council about flats, and ask your landlord or management company about permission. Our planning guide for Wales covers listed buildings and ground-mounted arrays too.

Grid connection and export payments

National Grid Electricity Distribution is the network operator for Swansea. A system at or below 16 A per phase uses the G98 route. Your installer then notifies the operator within 28 days. Bigger systems need approval first under G99.

Once the panels run, a Smart Export Guarantee tariff pays you for power you send out. Suppliers set the rates, and Ofgem counted 50 tariffs in 2024-25. Our post on the Smart Export Guarantee for Welsh homes shows how to compare them.

You will need an MCS certificate and an export meter to apply. Ask your chosen supplier what proof it accepts. Still, the bigger saving usually comes from using the power yourself, not from exporting it.

What solar costs in Swansea

Government cost data points to roughly £1,400 to £1,950 per kW installed in 2025-26. That puts a 4.5 kWp home system at about £6,500 to £8,800. Our breakdown of solar panel costs in Wales explains what sits inside those figures.

Home solar is zero-rated for VAT until 31 March 2027, and a battery fitted at the same time gets the same rate. After that date the rate becomes 5%. If you want a particular start date, say so when you request quotes.

Households on certain benefits may qualify for Warm Homes Nest. Green Homes Wales also offers owner-occupiers interest-free loans of £1,000 to £25,000. Neither promises to cover solar. The Wales solar funding guide sets out the current rules.

Requesting quotes for Swansea homes

Complete the enquiry form with your address and roof details. We pass it to MCS-certified installers who work in your area, and they contact you to arrange a survey. You then receive written quotes to compare.

Because designs differ, ask for the shade factor, the equipment names and the warranty terms in writing. Our guide to choosing an installer lists the questions that matter.

If your property sits near a boundary, look at the neighbouring areas too. You can read about solar installers in Neath, solar quotes around Llanelli and solar panel installers in Bridgend. The main service page, solar panel installation in Wales, explains the whole process.