Solar installers in Wales, plus quote guidance.
Solar yield varies between coastal, urban and upland locations. Check current Welsh and local authority support before signing a contract.
See installer records ↓Solar installers recorded for this region
This is a small, non-ranked research list based on statements on each company website. Inclusion is not an endorsement and no ratings or third-party reviews have been copied.
DEC Electrical
Residential and commercial solar PV and electrical installation services around Cardiff and South Wales.
DEC Electrical's Cardiff solar page directly describes the business as an MCS-certified provider of solar panel installations. Check its current certification scope in the official MCS finder.
Source checked 1 September 2026. Verify current certification, cover and consumer protections independently before instructing an installer.
Green Energy Solar
Domestic and commercial solar PV, battery-storage, system monitoring and repair services around Cardiff, Newport, Swansea and South Wales.
The Green Energy Solar homepage states that its installation teams are MCS accredited. Check the business and its current certification scope in the official MCS finder.
Source checked 28 August 2026. Verify current certification, cover and consumer protections independently before instructing an installer.
Heatforce
Solar panel installation and related home-energy services around Cardiff and South Wales.
The company website states that the business or its installation service is MCS certified, accredited or registered. Check its current scope directly in the official MCS finder.
Source checked 24 August 2026. Verify current certification, cover and consumer protections independently before instructing an installer.
Welsh Solar
Domestic and commercial solar PV and battery services across Wales.
The company website states that the business or its installation service is MCS certified, accredited or registered. Check its current scope directly in the official MCS finder.
Source checked 11 August 2026. Verify current certification, cover and consumer protections independently before instructing an installer.
A useful starting assumption
Our calculator begins at 820 kWh per installed kWp each year for this region, before roof-direction adjustments. A proper installer forecast should use the exact address, usable roof area, shading and proposed panel layout.
Calculate a regional estimate →What to verify
- MCS certification for the proposed installation
- Panel, inverter and workmanship warranties
- DNO notification or application requirements
- Whether export payments apply to your nation and tariff
- The final installed price, including scaffolding and electrical work