With energy costs climbing and environmental concerns on the rise, solar power is becoming a top choice for UK households and businesses.
The solar industry is growing fast, driven by technology improvements, financial incentives, and a growing demand for clean energy. As we enter 2025, more people are looking for reliable companies to install efficient and affordable solar systems.
In this blog, we explore the top solar providers in the UK, how to choose one, and what makes them stand out in a competitive market.
What Makes a Solar Company Stand Out in the UK?
A standout solar company in the UK combines trusted technology with great customer service. Companies must be certified by organisations such as MCS and RECC to ensure quality and compliance with UK standards.
Professionalism in installation, aftercare, and warranty support makes a huge difference to customers. Transparency is another key factor. Reputable solar firms provide clear, detailed quotes without hidden fees. They also offer strong warranties, ranging from 20 to 25 years on both panels and inverters.
Another important feature is the range of solar technologies. The best companies use high-efficiency panels, integrate battery storage, and offer smart monitoring tools.
These features help users save money and get more from their solar system. Positive customer reviews, regional support, and flexible finance plans also boost a company’s reputation.
A reliable solar installer ensures performance, safety, and peace of mind, making them a leader in the UK’s growing renewable energy sector.
Why Is Solar Power Gaining Popularity in the UK?
Solar power has experienced rapid growth across the UK due to a range of economic, environmental, and practical reasons. More homeowners and businesses are recognising solar as a long-term investment that pays off in cost savings and sustainability.
Key reasons for its rise include:
- Rising electricity prices make solar more attractive as it helps cut bills.
- Government incentives like the Smart Export Guarantee (SEG) reward users for exporting unused power.
- Environmental awareness is growing, and many are choosing solar to reduce carbon emissions.
- Solar technology has improved in recent years, making it effective even in the UK’s cloudy climate.
- Property value can increase with solar installations, adding appeal to potential buyers.
Solar energy also provides energy independence, which is appealing in a time of energy market uncertainty.
As battery storage becomes more accessible, solar systems are becoming even more efficient. Overall, the UK’s push towards net-zero carbon emissions is encouraging individuals and businesses alike to invest in solar solutions.
How Do You Choose the Right Solar Panel Installer?
Choosing the right solar installer in the UK can be the difference between a great investment and a costly mistake. With many options available, careful selection ensures quality, safety, and long-term performance.
When choosing a solar installer, consider the following:
- Certifications: Make sure the company is MCS-accredited and part of the RECC.
- Experience: Look for firms with a strong history in solar panel installations.
- Warranty: Choose companies offering at least 20- to 25-year warranties on panels.
- Customer reviews: Check trusted platforms like Trustpilot for honest feedback.
- Quotes: Get detailed quotes with a clear breakdown of equipment, labour, and VAT.
- Aftercare: Ensure the company provides support and maintenance after installation.
Additionally, assess if the installer offers battery storage and smart monitoring tools. These add-ons can increase the value of your solar setup. Choosing a company with a strong local presence is also beneficial, as they’ll be more responsive to servicing needs or technical issues over time.
Is Investing in Solar Energy a Smart Choice in 2025?
Investing in solar energy in 2025 is a smart decision for both financial and environmental reasons. The cost of installing solar panels has decreased, while electricity prices have continued to rise.
This makes the return on investment stronger than ever before. Modern solar panels are highly efficient and can generate sufficient power even during cloudy UK weather.
With options for battery storage, homeowners can store excess energy and use it during the night, further lowering grid dependency.
Moreover, schemes like the Smart Export Guarantee allow users to earn by exporting surplus electricity. These financial incentives, combined with energy savings, mean most users recover their investment within 7–10 years.
On top of all this, going solar contributes to the UK’s net-zero targets and reduces environmental impact. For those planning a greener future, 2025 is the ideal time to make the switch.
Top 10 Solar Companies in UK 2025
1. Project Solar UK
Project Solar UK is widely recognised as the largest and most reviewed solar installer in the country. With over 45,000 installations and thousands of verified 5-star reviews, their reputation is built on performance, transparency, and long-term value.
The company simplifies solar adoption through a step-by-step journey that includes a personalised consultation, detailed quote, and expert installation.
Key reasons to choose Project Solar UK:
- Lifetime panel warranty and a 10-year workmanship guarantee
- “Year One Performance Promise” ensures your solar system performs as quoted or they cover the shortfall
- UK-based support teams to guide customers from inquiry to post-installation
- Excellent customer feedback across platforms like Trustpilot
- Certified by MCS, HIES, NAPIT, and Flexi-Orb, ensuring compliance with the highest standards
- Offers flexible payment options and customised energy-saving quotes
Their process is smooth and efficient:
- Book a consultation
- Receive a custom home energy assessment and quote
- Get your solar system installed by certified technicians
As a media-recognised company featured by The Guardian and BBC Radio 4, Project Solar UK is an industry authority. They are a go-to option for anyone seeking reliable, future-ready solar power in 2025.
2. Tesla Energy (UK Division)
Tesla Energy is redefining home and national energy systems in the UK with intelligent, scalable storage solutions. Known globally for innovation, Tesla’s UK energy division delivers both residential Powerwall installations and large-scale battery systems like the Megapack.
Highlights of Tesla Energy UK:
- Tesla Powerwall stores solar energy for night use or power outages, increasing energy independence
- Grid-scale Megapack batteries help stabilise the national grid with stored renewable energy
- Plans to launch Tesla Electric, a new energy retail platform for managing, selling, and trading renewable energy
- Customers may participate in virtual power plants (VPPs) to monetise excess stored power
- Backed by a company with significant global experience and R&D investment
Why homeowners choose Tesla?
- Seamless integration with Tesla EVs and app-based monitoring
- Elegant, low-profile solar panels with high efficiency
- Proven commitment to sustainability and innovation
Tesla Energy offers future-proof solutions for environmentally conscious homeowners who want smart, connected energy systems. Its expansion in the UK puts it at the forefront of smart grid evolution heading into 2025.
3. SunPower by Plug Me In
SunPower by Plug Me In delivers high-performance solar and battery systems with a customer-first approach. Backed by the Calisen Group, the company brings global solar technology to homes, commercial spaces, and public housing sectors across the UK.
What sets Plug Me In apart?
- Full-service provider from design and funding to installation and maintenance
- Premium SunPower panels known for best-in-class efficiency and durability
- Includes EV chargers, heat pumps, and energy storage options
- Flexible finance options with zero upfront cost for many customers
- National coverage ensures support wherever you are in the UK
Additional benefits:
- UK-based call centre for rapid support and troubleshooting
- Smart systems help reduce reliance on the grid
- Works with housing associations and local authorities for large-scale installations
Whether you’re retrofitting your home or outfitting an entire development, SunPower by Plug Me In offers the tools, technology, and guidance to make clean energy simple and effective in 2025.
4. Solar Together
Solar Together brings collective purchasing to the world of solar. This unique platform allows homeowners to access high-quality solar PV and battery storage at below-market rates by participating in a council-supported group-buying scheme.
How the Solar Together model works?
- Free online registration: takes only minutes
- Auction phase: pre-vetted MCS-accredited installers bid for group contracts
- Personal quote: homeowners receive custom offers based on property data
- Decision-making: accept or decline your offer at no obligation
- Installation: approved installers complete the work with warranties included
Key advantages:
- Average savings of 10–25% on installations
- All installers must be MCS certified and RECC or HIES members
- Includes battery storage and EV charger options
- Backed by iChoosr, experts in group-buying since 2012
- Over 40,000 installations and 351,000 panels deployed through the programme
Solar Together offers peace of mind, affordability, and simplicity, ideal for those new to solar or looking to save without compromising on quality.
5. Evergreen Power Solar
Evergreen Power Solar is a leading UK installer known for its blend of affordability, quality, and nationwide reach. Operating since 2013, the company has performed over 25,000 installations and built a loyal customer base with more than 1,500 five-star reviews.
Why homeowners trust Evergreen Power?
- In-house team, no subcontractors, ensuring quality control
- Accreditations with MCS, HIES, Trustmark, NAPIT, and EPVS
- Offers the Evergreen Price Promise to beat like-for-like quotes
- Free property survey and 12-month quote validity
- Offers solar panels, batteries, EV chargers, and ground/flat roof installations
Customer-focused advantages:
- Transparent pricing and detailed proposals
- Expertise in both residential and commercial solar
- Offices across the UK for localised support and quick service
Evergreen Power UK combines technical expertise with genuine customer care. Their long-term vision is to help homes transition affordably to clean, renewable power without hassle or compromise in 2025.
6. Geo Green Power
Geo Green Power is a veteran in the UK’s renewable energy sector, offering expertly engineered solar panel systems, battery storage, heat pumps, and EV charging solutions.
With more than 14 years of experience, the company delivers scalable systems tailored to both homes and large-scale commercial operations.
Why Geo Green Power stands out?
- Specialises in large-scale commercial installations, including rooftop and ground-mounted solar systems
- Over 1.5 to 2MW of solar installed every month, partnering with brands like Smeg and Mercedes Benz
- Offers complete renewable heating solutions using ground and air-source heat pumps
- Designs battery backup systems for full off-grid or power-cut resilience
- Certified with ISO9001, ISO14001, and CHAS, ensuring professionalism and environmental commitment
Benefits for residential and commercial clients:
- Dedicated team of engineers, electricians, and designers
- Transparent project management from quote to post-installation
- Strong relationships with businesses, housing developers, and councils
- Maintenance and servicing options available for long-term system care
Whether powering a leisure centre, council facility, or private home, Geo Green Power is a trusted name for turnkey renewable systems that reduce emissions and long-term energy costs.
7. Soly UK
Soly UK combines affordability, advanced tech, and a customer-first digital experience to offer solar panels, battery storage, and energy insights across the UK.
Since expanding from the Netherlands in 2023, Soly has gained a strong reputation for transparent pricing and smart solar systems.
Why Soly is gaining momentum?
- Offers the Soly Brain®, a smart app that gives real-time insight into household energy use
- Provides solar, battery, and EV charging in one bundled, finance-friendly system
- Digitally-led process with online configurator, remote consultations, and paperless quotes
- Trusted certifications from MCS, HIES, and TrustMark
- Zero-deposit finance plans starting from £75/month via Hometree Finance
Key benefits for homeowners:
- Fast and simple configuration through their website
- Nationwide coverage with certified local installers
- Performance guarantees of up to 25 years on panels and inverters
- B Corp certified for ethical and environmental responsibility
- Excellent reviews across Trustpilot and Google
Soly is ideal for UK homeowners looking for a smart, all-in-one energy solution that is easy to access, install, and manage, especially for those aiming for energy independence in 2025.
8. Joju Solar
Joju Solar has been at the forefront of ethical solar energy solutions since 2006. Known for their work with councils, universities, and communities, they offer solar PV, battery storage, and EV charging, all integrated into custom-designed systems.
What makes Joju Solar exceptional?
- The UK’s longest MCS-accredited installer and multiple award winner
- Specialists in community-funded and public sector projects
- Experts in Tesla Powerwall installations, EV charging, and battery integration
- Deep technical experience with a focus on safety and compliance
- In-house team of engineers, not salespeople, ensuring honesty and skill
Services tailored to all types of clients:
- Residential, commercial, and new-build solar solutions
- Battery storage systems that support smart grid connectivity
- EV charging points for home or commercial use
- Remote system monitoring and maintenance packages
Joju Solar is especially well-suited for organisations and individuals looking for dependable, long-term partners. With an ethical, quality-first approach and a track record of innovation, Joju continues to be a pioneer in 2025.
9. The Little Green Energy Company
The Little Green Energy Company (TLGEC) is a trusted solar installer serving Kent, Surrey, Sussex, and surrounding areas since 2010. Known for precision installations and a customer-centric approach, they specialise in Tesla Powerwall systems, SunPower panels, and integrated solar-plus-battery packages.
Reasons to choose TLGEC:
- Over 1,000 solar installations completed across the South East
- UK’s first Tesla Powerwall installer and recipient of the Tesla Installation Excellence Award
- Offers the Solar Plan with £0 deposit and monthly payments through Hometree Finance
- Uses only top-tier technology with long performance warranties
- Recognised as a Which? Trusted Trader and Checkatrade-approved
Why homeowners love them:
- Excellent reviews and long-term support, including system maintenance
- Tailored systems based on property and energy-use habits
- Seamless customer journey from quote to handover
- Trusted by schools, healthcare providers, and commercial clients
TLGEC is ideal for those in the South East who want high-efficiency solar and storage with unbeatable service. Their professionalism, premium technology, and award-winning service make them a standout in 2025.
10. Spirit Energy
Spirit Energy, based in Reading, Berkshire, delivers precision-engineered solar, battery, and EV charging systems for homes and businesses. Since 2010, they’ve installed over 4,500 renewable energy systems across southern England and the Midlands.
What makes Spirit Energy a top-tier installer:
- An engineer-led team focused on technical excellence, not salesmanship
- Tailored solutions for residential, commercial, and industrial sites
- In-house experience with bespoke projects, including solar PV cladding and UPS systems
- Services include consultancy, feasibility studies, and system portfolio analysis
- Accreditations across solar PV, battery, and EV technologies
Comprehensive service offerings:
- Solar PV installation for all building types
- Battery storage integration for self-consumption and backup
- EV charge point installations for home and business fleets
- System servicing including cleaning, maintenance, and bird-proofing
- Educational CPD training and sustainability seminars
Spirit Energy is the go-to provider for clients who want more than just a standard install. Their knowledge, versatility, and consultative approach make them a trusted engineering partner in 2025’s solar landscape.
Comparison Table: Best Solar Companies in UK (2025)
| Company | Coverage Area | Panel & Tech Brands | Battery Storage | Warranty Offered | Customer Rating |
| Project Solar UK | Nationwide | Project Solar, LG, JA Solar | Yes | Lifetime Panel + 10 Yr Workmanship | 4.7/5 (Trustpilot) |
| Tesla Energy UK | Nationwide | Tesla Solar + Powerwall | Yes | 25-Year Panel + Battery | 4.8/5 (Tech-based reviews) |
| SunPower by Plug Me In | Nationwide | SunPower | Yes | 25-Year Panel + System | 4.7/5 (Trustpilot) |
| Solar Together | Regional (Council-Led Areas) | Vetted Installers (MCS) | Optional | Varies per Installer | 4.4/5 (Scheme-wide) |
| Evergreen Power Solar | Nationwide (HQ in London) | JA Solar, Growatt, Fox ESS | Yes | 25-Year Panel + Workmanship | 4.6/5 (Trustpilot) |
| Geo Green Power | Nationwide | Multiple Tier-1 Brands | Yes | 20-25 Year Options | 4.6/5 (Commercial & Domestic Feedback) |
| Soly UK | Nationwide | Soly Panels + Inverters | Yes | 25-Year Panel + 10 Yr Workmanship | 4.8/5 (Trustpilot) |
| Joju Solar | Nationwide | SunPower, Tesla, Sonnen | Yes | Up to 25 Years (Brand Dependent) | 4.7/5 (Community Projects) |
| The Little Green Energy Co. | Kent, Surrey, Sussex | Tesla Powerwall, SunPower | Yes | 25-40 Year Panel + Tesla Warranty | 4.8/5 (Checkatrade & Trustpilot) |
| Spirit Energy | Southern England & Midlands | Various Premium Brands | Yes | Customised 20–25 Yr Options | 4.6/5 (Technical Reviews) |
Conclusion
The solar energy landscape in the UK is brighter than ever in 2025. With top companies offering reliable service, high-efficiency panels, and flexible packages, it’s easier than ever to make the switch.
Whether you’re looking for affordable group buying or premium smart solar systems, there’s a trusted provider for every need.
Investing in solar not only helps cut energy costs but also supports the UK’s path to sustainability. Make the informed choice today and join the clean energy movement.
FAQs About Top 10 Solar Companies in UK
What is the average payback period for solar panels in the UK?
Most homeowners recover their solar investment within 7 to 10 years depending on usage and battery storage. High-efficiency systems can shorten this timeline.
Are UK homeowners eligible for solar panel grants or incentives?
Yes, the Smart Export Guarantee allows users to earn for exporting excess electricity. Some local councils also offer additional funding support.
Do all solar companies in the UK offer battery storage options?
Not all do, but many of the top providers now include battery storage as part of their packages. This allows for energy usage at night or during outages.
How does solar panel efficiency differ among top brands?
Brands like SunPower offer panels with efficiency above 22 percent. Other popular brands range from 18 to 21 percent efficiency.
Can solar panels work efficiently during UK winters and cloudy days?
Yes, modern solar panels work well in diffused light and can still produce energy on cloudy days. Efficiency may be lower, but systems remain operational.
What certifications should a trusted solar installer have?
Trusted installers should be certified by MCS and be part of RECC or NICEIC. These ensure compliance with industry standards and quality assurance.
Are maintenance services included in solar installation packages?
Some companies include annual maintenance, while others offer it as an optional add-on. It’s best to confirm what’s included in your quote.
