Ask any facilities manager why solar is on the board agenda and the answer is simple: spiralling energy bills. Commercial PV now offers a proven route to slash daytime running costs and insulate budgets from future price shocks—often with zero interruption to daily operations. The panels are a visual statement, too, signalling to clients and staff that your business is serious about sustainability.
Because the choice of installer can make or break the outcome, we’ve hand-picked the ten strongest solar companies in the South East. Our shortlist balances long-standing reputation, robust accreditations and glowing customer reviews, giving you a head-start on finding the perfect fit for your project.
1. Perfect Sense Energy
Perfect Sense Energy is the highest-rated solar installation company in the UK. It specialises in the design, supply, installation, and maintenance of renewable energy technologies for commercial clients. With over a decade of experience, they help businesses buy better, use less, and generate their own energy. They have powered leading organisations throughout the UK, focusing on energy efficiency and sustainability.
Office Location: Leigh, England
Website: perfectsenseenergy.com
Year Founded: 2010
Team Size: 11–50 employees
Industries Served: Commercial buildings, manufacturing, education, healthcare, agriculture
Case Studies: View all case studies
2. Deege Solar
Deege Solar is an award-winning solar panel company serving the South East region. Recognised as the Best Solar Panel Company in the South East Region in 2022, they offer unmatched customer service, installation, and products. Their team has grown by 50% in a year, reflecting their commitment to delivering emerging green technologies across the UK.
Office Location: South Ockendon, Essex
Website: deegesolar.co.uk
Year Founded: 2017
Team Size: ≈ 10 employees
Industries Served: Residential and commercial
Case Studies: View all case studies
3. Sunbright Energy
Sunbright Energy is a family-run solar panel installer based in the heart of South East England. Established in 2014, they have over 10 years of experience in the solar industry, specialising in both residential and commercial solar PV installations, as well as battery storage and EV chargers.
Office Location: Kent, England
Website: sunbrightenergy.co.uk
Year Founded: 2014
Team Size: ≈ 10 employees
Industries Served: Residential and commercial
Case Studies: View all case studies
4. Atlas Solar
Atlas Solar is a local solar PV installer serving the South East of England. As part of Atlas Electrical Solutions Ltd, they are MCS certified, a member of RECC & NICEIC, and offer full certification and 5-year insurance-backed workmanship warranties on new installations.
Office Location: St. Leonards-on-Sea, East Sussex
Year Founded: 2022
Team Size: Small 2-10 crew
Industries Served: Residential and commercial
Case Studies: Not specified
5. South East Solar & Electrical (SESE)
SESE is a solar panel installation expert and renewable energy specialist based in Kent. They provide domestic and commercial services across the South East of England, focusing on solar panel installs, maintenance, and storage systems.
Office Location: Rochester, Kent
Website: southeastsolar.co.uk
Year Founded: 2014
Team Size: 11–50 employees
Industries Served: Residential and commercial
Case Studies: View all case studies
6. Solarserve
Solarserve is one of the UK’s fastest-growing solar panel and clean energy technology installers, serving London, Kent, and East Sussex. They offer residential and commercial solutions, including battery systems and EV charging.
Office Location: Tunbridge Wells, Kent
Website: solarserve.co.uk
Year Founded: 2013
Team Size: 2–10 employees
Industries Served: Residential and commercial
Case Studies: Not specified
7. SogoSolar
SogoSolar are designers and installers of solar energy systems, operating across South East England, with a focus on Greater London and Surrey. They install solar panels, battery storage, and electric car charging points from leading brands.
Office Location: London, England
Website: sogosolar.co.uk
Year Founded: 2010
Team Size: 2–10 employees
Industries Served: Residential and commercial
Case Studies: View all case studies
8. Ecowise Renewables
With 15 years of experience, Ecowise Renewables is an MCS Accredited installer of renewable energy systems in the South East. They offer installations with an HIES-backed guarantee, serving both homeowners and businesses.
Office Location: Essex, England
Website: ecowiserenewables.co.uk
Year Founded: 2022
Team Size: ≈ 15 employees
Industries Served: Residential and commercial
Case Studies: View all case studies
9. Volta Green Energy Ltd
Volta Green Energy Ltd is an MCS certified solar panel installer operating across Kent, Essex, Surrey, and Sussex. They specialise in solar panel & battery systems and EV charger solutions, offering affordable prices and qualified technicians.
Office Location: Kent, England
Website: voltagreenenergy.co.uk
Year Founded: 2022
Team Size: 2–10 employees
Industries Served: Residential and commercial
Case Studies: View all case studies
10. Solar4us
Solar4us Ltd designs, supplies, and installs solar panels for architects, developers, businesses, and householders across Greater London, Surrey, Kent, Sussex, and most of the South East. They provide comprehensive quotes with multiple options to suit customer needs.
Office Location: Not specified
Website: solar4us.com
Year Founded: 1985
Team Size: < 10 employees
Industries Served: Residential and commercial
Case Studies: Not specified
Methodology for Ranking
We’ll use a scoring framework similar to the Birmingham piece. Here’s a draft breakdown:
| Stage | What We Check | Weight | Sources |
| 1. Long-List | Must mention service in South East counties | — (pre-filter) | Google Maps, Checkatrade, MCS, RECC |
| 2. Accreditation Check | MCS + RECC + optionally NAPIT / TrustMark | Pass/Fail | MCS & RECC registries |
| 3. Reputation Scan | Ratings + volume + red flags (complaints, low response rate) | 40% | Trustpilot, Google, Checkatrade |
| 4. Experience & Scale | Years in business, team size, project volume | 30% | Companies House, LinkedIn, websites |
| 5. Local Footprint | South East address or dedicated local landing pages | 20% | Google Maps, company websites |
| 6. Differentiators | Finance offers, battery/EV expertise, tech stack, major installs | 10% | Press, websites, blogs |
The Bottom Line
The ten installers we’ve profiled prove that quality solar expertise is alive and well across the South East, whether you need a 30 kW retrofit or a multi-megawatt commercial array. A carefully designed system will start trimming your electricity bills from day one—while polishing your ESG credentials for investors, customers and regulators alike.
Ready to see what the sun can do for your bottom line? Contact Perfect Sense Energy today for a free feasibility assessment and tailored proposal.
FAQs
What are the 10 best solar companies in the South East?
The 10 best solar companies in the South East of England include:
- Perfect Sense Energy
- Deege Solar
- Sunbright Energy
- Atlas Solar
- South East Solar & Electrical (SESE)
- Solarserve
- SogoSolar
- Ecowise Renewables
- Volta Green Energy Ltd
- Solar4us
These companies were selected based on accreditations, customer reviews, regional presence, and project experience.
Is solar power worth it in the South East UK?
Yes, solar power is absolutely worth it in the South East. The region benefits from some of the UK’s highest solar irradiance levels, making it ideal for generating clean, renewable energy. Homes and businesses can save significantly on electricity bills, reduce carbon emissions, and gain long-term energy independence.
How do I choose a reliable solar installer?
To choose a reliable solar installer, look for companies that are MCS certified, have strong customer reviews, offer clear warranties, and have experience with similar property types. It’s also important to check their case studies and whether they provide aftercare or maintenance services.
How much do solar panels cost in the South East?
Solar panel installation in the South East typically costs between £4,000 and £8,000 for a residential system, depending on size and battery storage. Commercial systems vary more widely based on scale. Many installers offer 0% finance or tailored payment plans to spread the cost.
Can solar panels really reduce my energy bills?
Yes, solar panels can significantly reduce your electricity bills. By generating your own power, you rely less on grid energy—especially during peak hours. With battery storage, you can maximise savings by storing excess energy for use at night or during outages.
