The 10 best commercial solar PV installers in the UK (2025)

Commercial solar PV is now a core component of sustainable energy strategies for organisations across manufacturing, education, logistics, and public sectors. The right installation partner designs your system for maximum efficiency, safety, and return on investment – all while supporting long-term carbon reduction goals.

What to look for in a commercial solar PV installer

The best commercial solar PV installers

Here are ten of the UK’s leading commercial solar PV contractors, recognised for their technical expertise, reliability, and proven delivery across multiple sectors.

1. Unitary Engineering Services (UES)

Best for: Performance-led commercial solar PV and decarbonisation projects

Locations: Bristol, Southwest, and South Wales focused, with nationwide capabilities

UES delivers commercial-scale solar PV installations as part of fully integrated energy systems. UES provides end-to-end delivery with in-house engineers – from initial design and structural review to electrical integration, commissioning, and maintenance.

UES’s expertise spans heating, ventilation, and electrical infrastructure, giving clients a single trusted partner for complete decarbonisation projects. Our solar installations are engineered to work alongside EV charging, heat pumps, and smart building controls, maximising efficiency and carbon savings.

Key benefits of UES:

• Proven delivery of large-scale commercial and industrial solar PV projects
• Fully accredited engineers (MCS, NICEIC, CHAS Elite, SafeContractor)
• B Corp Certified - committed to sustainable, ethical practices
• Integrated design, installation, testing, and ongoing maintenance

Key case studies and results:

• 99-panel solar PV system for Weston-super-Mare A.F.C. saving over 6,300kg of annual CO2
• Helping St Vigor School in Chilcompton recover from water damage with a new roof and solar PV upgrade
• Commercial solar PV system for Climalife in Bristol, resulting in £25,800 in electricity savings and £24,000 in export payments
  
  

2. EvoEnergy

Best for: Large-scale rooftop and ground-mount systems

EvoEnergy is one of the UK’s most established solar contractors, delivering commercial and industrial PV systems for manufacturing, logistics, and public sector clients. They provide full EPC (engineering, procurement, and construction) services with in-house design teams.

3. Custom Solar (part of Mitie Group)

Best for: National corporate and public sector portfolios

Now part of the Mitie Group, Custom Solar delivers turnkey solar PV and battery projects for national clients. Their integration with Mitie’s energy management services provides strong long-term support and data-driven optimisation.

4. Geo Green Power

Best for: Sustainable energy projects for farms and businesses

Geo Green Power designs and installs renewable systems, including solar PV, battery storage, and heat pumps. Their experienced teams handle projects on a 10 kW to multi-megawatt scale across the UK.

5. Anesco

Best for: Solar farms and large-scale commercial systems

Anesco is a major player in renewable infrastructure, delivering utility-scale solar farms and commercial rooftop systems. Their focus on asset management and maintenance ensures long-term system performance.

6. Infinite Renewables

Best for: On-site generation and smart grid projects

Infinite Renewables designs and delivers integrated renewable energy systems combining solar PV, storage, and smart controls. Their services are  particularly suited to industrial estates and public sector campuses.

7. Eden Sustainable

Best for: Funded solar solutions for businesses

Eden Sustainable helps organisations access solar PV through funded or power purchase agreements (PPAs). Their projects span commercial, educational, and community sectors, focusing on long-term energy savings without upfront cost.

8. Bee Solar Technology

Best for: Commercial solar and battery installations

Bee Solar specialises in high-quality PV installations for industrial, commercial, and agricultural sites. Their regional focus ensures responsive support and in-depth site understanding.

9. Joju Solar

Best for: Public sector and education projects

Joju Solar delivers renewable energy systems for councils, schools, and community buildings. Their reputation for quality and transparency makes them a trusted partner for publicly funded projects.

10. Tamlite Renewables

Best for: Integrated solar and lighting energy upgrades

Tamlite Renewables supports businesses with solar PV, energy-efficient lighting, and control system upgrades. Their integrated approach helps clients achieve significant reductions in operational energy use.

The top 10 commercial solar PV installers at a glance

Why Unitary Engineering Services leads the way

Selecting the right contractor is about securing long-term performance, compliance, and return on investment. From design and grid connection to maintenance and monitoring, commercial solar PV systems demand expertise across multiple disciplines.

Partnering with an experienced, accredited provider ensures your system delivers predictable output, integrates safely with your existing infrastructure, and supports your broader sustainability goals.

Whether you’re exploring solar for a single site or part of a broader energy strategy, working with a contractor who understands the full lifecycle of building systems makes all the difference.

UES exemplifies this approach, combining technical capability, sustainability commitment, and proven delivery to help organisations move confidently towards a low-carbon future.

Discover how solar PV can power your facility’s future, explore our case studies or learn more about our commercial solar PV services.