If you’re considering installing solar panels for your home or business in the UK, selecting a reputable installer is crucial. Based on recent analyses and customer reviews, here are 18 of the best solar panel installers in the UK for 2025.
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Our selection criteria – What makes a good solar panel installer?
Choosing the best solar panel installers can make a huge difference to the performance, longevity and overall value of your solar system. For this guide, we carefully assessed each installer against a set of strict criteria to ensure they meet the highest standards. Here’s what we considered:
Experience and expertise
We prioritised companies with a proven track record in solar installations, whether for homes, businesses or large-scale commercial projects. Installers with thousands of completed projects and years of industry experience scored higher.
Warranties and guarantees
A strong warranty is a sign of a company that trusts its products and workmanship. We looked for installers offering at least 10-year labour warranties and long product guarantees (often 25 years for panels).
Customer reviews and reputation
Customer feedback was a major factor. We used Trustpilot scores, Google reviews and independent consumer reports to evaluate satisfaction levels, installation quality, aftercare service, and reliability.
Accreditations and certifications
We gave preference to installers certified by industry bodies such as MCS (Microgeneration Certification Scheme), RECC (Renewable Energy Consumer Code), and NICEIC. These certifications offer added consumer protection.
Pricing and finance options
Cost transparency and flexible finance options are vital. We highlighted companies offering fair pricing, clear quotes, and payment plans to help make solar more accessible.
Range of services
The best solar panel installers should offer more than just solar panels. We favoured companies providing battery storage solutions, Electric Vehicle charger installations, maintenance services, and energy efficiency advice.
Sustainability credentials
Since solar is a green investment, we looked for companies that show a genuine commitment to sustainability – whether through eco-friendly business practices, carbon offsetting initiatives, or community energy projects.
1. Project Solar UK – Best overall
As the UK’s largest solar installer, Project Solar UK boasts over 45,000 installations. They offer a lifetime product warranty and a 10-year labour guarantee, ensuring long-term peace of mind for customers.
Best for: Homeowners and businesses wanting the reassurance of a large, established installer with long warranties.
Pros:
- Lifetime product warranty
- 10-year labour guarantee
- Large national installer with wide coverage
Cons:
- Some customers report aggressive sales tactics
- Prices can be higher than smaller competitors
2. Solar Fast – Best for customer service
Established in 2006, Solar Fast has garnered praise for its exceptional customer support and aftercare services. Their dedication to client satisfaction is evident in their high Trustpilot ratings.
Best for: Customers prioritising aftercare and high-quality customer support.
Pros:
- Outstanding customer service
- Fast installation times
- Excellent Trustpilot ratings
Cons:
- Limited to residential projects
- Slightly fewer finance options
3. Octopus Energy – Best value for money
Octopus Energy offers competitive pricing without compromising on quality. Their solar installations come with a 25-year product warranty, making them a cost-effective choice for many homeowners.
Best for: Budget-conscious buyers seeking great value without compromising on quality.
Pros:
- Highly competitive pricing
- 25-year product warranty
- Renowned for ethical business practices
Cons:
- Installation availability can vary regionally
- Limited bespoke system design
4. Solar4Good – Best for customer feedback
Solar4Good stands out for its positive customer reviews and commitment to providing tailored solar solutions. They offer flexible financing options, including zero upfront costs, making solar accessible to a broader audience.
Best for: Homeowners seeking flexible payment plans and excellent customer feedback.
Pros:
- Highly rated by customers
- Offers £0 upfront finance
- Nationwide coverage
Cons:
- Newer company compared to some competitors
- Not as experienced with complex or commercial projects
5. Geo Green Power – Best for commercial installations
Specialising in commercial solar projects, Geo Green Power has a strong track record of delivering large-scale installations across the UK. Their expertise ensures efficient and reliable solar solutions for businesses.
Best for: Businesses needing experienced commercial solar installations.
Pros:
- Strong track record with commercial solar
- Bespoke system designs
- Experience with large-scale installations
Cons:
- Focus more on businesses than homes
- Higher minimum project size
6. Heatable – Best for houses
Heatable offers nationwide coverage with a focus on residential installations. Their online platform provides instant quotes, and they pride themselves on quick turnaround times and high-quality installations.
Best for: Homeowners wanting fast, simple solar panel installation.
Pros:
- Quick online quotes
- Nationwide residential service
- Straightforward pricing
Cons:
- Focused mainly on standard installations
- Limited commercial services
7. Soly – Best newcomer
Entering the UK market in 2023, Soly brings fresh perspectives and innovative solutions to solar installations. Their offerings include up to 12-year labour warranties and 25-year product warranties.
Best for: Those looking for modern, tech-driven solar installation with strong warranty support.
Pros:
- Fresh and innovative company
- 12-year labour warranty and 25-year product warranty
- Focus on digital customer experience
Cons:
- New to the UK market
- Limited brand recognition
8. Egg (Cracking Energy) – Best for small businesses
Egg focuses on providing sustainable energy solutions for small businesses. Their services encompass solar panel installations, battery storage, and EV charging solutions.
Best for: Small businesses wanting flexible solar solutions and EV charging integration.
Pros:
- Ideal for small businesses
- Offers solar, batteries, and EV charging
- Flexible subscription models available
Cons:
- Subscription model might not suit everyone
- Less focused on larger businesses
9. Glow Green – Best on a budget
Glow Green offers affordable solar solutions without compromising on quality. Their flexible financing options and comprehensive warranties make them a popular choice for budget-conscious customers.
Best for: Cost-conscious homeowners seeking affordable solar panels.
Pros:
- Affordable pricing
- Flexible finance options
- Strong warranty coverage
Cons:
- Mixed customer service reviews
- Some geographic limitations
10. Everyone’s Energy UK – Best for flats
Specialising in installations for flats and apartments, Everyone’s Energy UK provides tailored solutions to maximise energy efficiency in multi-unit dwellings.
Best for: Owners of flats or apartments who need tailored solar panel installations.
Pros:
- Specialists in flat and apartment solutions
- Tailored systems for non-standard buildings
- Focused on energy efficiency
Cons:
- Less experience with large-scale commercial work
- Fewer high-end product options
11. Effective Home – Best for social housing
Effective Home collaborates with housing associations and local authorities to deliver solar solutions for social housing projects, promoting sustainability and reducing energy costs for residents.
Best for: Social housing providers needing solar solutions for tenants.
Pros:
- Specialist in social housing projects
- Works with housing associations and councils
- Focus on affordability
Cons:
- Not ideal for bespoke high-end residential systems
- Heavily project-based
12. 0800 Repair – Best for small businesses
With a focus on the North East of England, 0800 Repair offers comprehensive solar installation services tailored to the needs of small businesses, ensuring energy efficiency and cost savings.
Best for: Small businesses based in the North East looking for full solar care services.
Pros:
- Strong presence in the North East
- Good for small business needs
- Offers maintenance and repair services
Cons:
- Regional rather than national
- Limited focus outside North East England
13. Clever Energy Boilers – Best for EV owners
Clever Energy Boilers integrates solar panel installations with EV charging solutions, providing a seamless experience for electric vehicle owners looking to harness renewable energy.
Best for: EV owners seeking integrated solar panel and EV charger packages.
Pros:
- Great option for EV owners
- Combines solar panels with EV chargers
- Financing options available
Cons:
- Primary expertise is boilers, not only solar
- Coverage may not be truly national
14. Warma UK – Best for solar panel grants
Warma UK assists customers in accessing available grants and incentives for solar installations, making renewable energy more accessible and affordable.
Best for: Homeowners seeking help with grants and government incentives.
Pros:
- Helps customers access solar grants
- Good financing choices
- Focus on affordability
Cons:
- Less transparent about installation partners
- Mixed reviews for communication
15. Greener Energy Group – Special mention
Based in Scotland, Greener Energy Group offers a range of renewable energy solutions, including solar panel installations, with a commitment to environmental sustainability.
Best for: Scottish homeowners wanting a trusted local solar installer.
Pros:
- Based in Scotland with strong local presence
- Range of renewable energy services
- Good for environmentally conscious customers
Cons:
- Limited outside Scotland
- Smaller scale operations
16. Sunsave – Best for solar subscriptions
Sunsave introduces a subscription-based model for solar installations, allowing customers to benefit from solar energy without significant upfront costs. Their 20-year guarantee includes maintenance and equipment replacement.
Best for: Those wanting solar panels with minimal upfront financial commitment.
Pros:
- Subscription-based model
- No large upfront costs
- 20-year maintenance and replacement guarantee
Cons:
- Long-term subscription may cost more overall
- Limited flexibility compared to ownership
17. Solar Simplicity – Best for digital experience
Solar Simplicity offers a streamlined digital journey for customers, from consultation to installation. Their focus on customer satisfaction is reflected in their high Trustpilot ratings.
Best for: Customers who prefer an easy, fully online solar buying process.
Pros:
- Strong digital experience
- High Trustpilot ratings
- Streamlined customer journey
Cons:
- More suited to straightforward installations
- Less personalisation for complex systems
18. Solarsense UK Ltd – Best for experience
With over 15,000 renewable energy installations since 1995, Solarsense UK Ltd brings a wealth of experience to both residential and commercial solar projects across the UK.
Best for: Customers wanting a highly experienced installer for larger or more complex projects.
Pros:
- Over 15,000 renewable energy installations
- Highly experienced
- Wide portfolio of residential and commercial projects
Cons:
- Premium pricing
- Waiting times can be longer due to high demand
Choosing the best solar panel installers
When selecting the best solar panel installers for your needs, consider factors such as warranty offerings, customer reviews, and the range of services provided. It’s advisable to obtain multiple quotes and consult with installers to determine the best fit for your specific needs.