The United Kingdom’s solar sector has grown steadily against a backdrop of rising energy costs and expanding commercial demand for rooftop and ground-mounted systems, with installed capacity now well above 18 GW. Behind that growth sits a fragmented but increasingly professionalised installer market, ranging from large-scale commercial and industrial contractors to regional specialists with decades of MCS-certified residential work behind them. This article presents a curated Top 10 of PV Installers in the UK, selected for overall scale, installed capacity, and significance within the UK solar market.

The full research dataset, including verified contact information, LinkedIn profiles, certification status, and installed capacity figures for all 600+ companies, is available exclusively through the Renewables.Digital Research Platform.

Top 10 – Curated Selection

Sorted by installed capacity. Two entries with anomalous capacity figures in the source data were excluded from this ranking as they could not be verified. Management names and precise revenue figures are intentionally excluded from this overview.

Industry Overview: Solar PV Installation in the United Kingdom

The UK’s PV installer market spans a wide range of scale, shaped by rising commercial demand for rooftop and ground-mounted systems alongside a large, well-established residential sector built on MCS certification and government incentive schemes over the past two decades. The companies in this curated selection reflect that spread, from installers with hundreds of megawatts of commercial and industrial project experience down to firms with strong regional footholds built over ten to fifteen years.

Large Commercial and Industrial Installers

Boom Power, based in Arundel, West Sussex, and Viking Renewable UK, headquartered in Westbury, lead the curated selection with the largest installed capacity figures, reflecting their focus on large-scale commercial, industrial, and ground-mounted solar projects. Sunways Global, based in London, rounds out the top tier with a similarly substantial project portfolio serving business clients across the country.

Established Mid-Scale Installers

Geogreen Power, Low Carbon Energy, and Your Eco Construction occupy the middle of the market, each with more than a decade of track record delivering commercial and residential solar across the East Midlands, Lancashire, and the South West respectively. CleanEarth Energy and Amelio Solar Energy, both founded in 2010, have built comparable scale serving Cornwall and Lincolnshire.

Regional Specialists

Perfect Sense Energy, operating from Manchester since 2010, has generated more than 10 GWh of solar energy and offers flexible finance options including investor-funded power purchase agreements for commercial clients across the North West. Go Green Systems, based in Shrewsbury, completes the list with a steady regional presence built since 2010.

Market Outlook

With UK solar capacity continuing to grow on the back of falling equipment costs and rising commercial appetite for on-site generation, competition is intensifying between larger EPC-style contractors chasing utility and commercial-scale projects and smaller regional installers defending established residential client bases. Consolidation among mid-sized firms, alongside continued growth in battery storage and EV charging as complementary services, is a trend worth watching as the market matures.

This list is an excerpt from our larger database of PV installers across Europe.