The solar market is expanding at a rapid pace, driven by increasing consumer interest and governmental support for renewable energy.
According to official government data, by the end of August 2024, there were over 1.6 million solar panel installations across the UK, a number that is expected to continue rising in the coming years.
However, with thousands of registered solar panel installers available, selecting the right installer can be an overwhelming process. A poor installation can result in decreased efficiency, frequent system failures, and unexpected costs.
Moreover, the solar industry has seen its fair share of companies shutting down after only a few years in operation, leaving customers without support. Therefore, it is more crucial than ever to choose an installer with a solid reputation, financial stability, and strong aftercare services.
This comprehensive guide simplifies the decision-making process by evaluating some of the best solar panel installers in the UK. We assess key factors such as industry accreditations, warranty offerings, customer ratings, and cost transparency.
Pro Tip:
Avoid unnecessary upsells and overly complex package deals. Look for providers that offer clear, fixed-price quotes that won’t change unexpectedly. For instance, Heatable, a Which?-approved solar installer, provides transparent pricing with no hidden costs or unexpected fees.
Quick Overview – Best Solar Panel Installers in the UK:
| Solar Installation Company | Labour Warranty | Product Warranty | Year Founded |
|---|---|---|---|
| Project Solar UK | 10 years | Lifetime | 2011 |
| Solar Fast | 2-years | 25 years for panels, 30-years for performance, 10-12 years for inverters | 2006 |
| Octopus Energy | Unknown | 25 years | 2015 |
| Heatable | 2 years | 25 years | 2017 |
| Soly | Up to 12 years | 25 years | 2013 (Netherlands; UK 2023) |
| Egg | Unknown | 25 years | 2010 |
| Glow Green | 5 years (20 under subscription plan) | Up to 30 years | 2011 |
| Everyone’s Energy UK | 2 years | 25 years | 2019 |
| Effective Home | 2 years | 25 years | 2016 |
| 0800 Repair | 1 year | Unknown | 2017 |
| Clever Energy Boilers | 2-5 years | 25/30 years for panels, 10/12 years for inverters | 2010 |
| Warma UK | 2 years | 25 years | 2016 |
| Greener Energy Group | Unknown | 25 years | 2014 |
Who Are the Best Solar Panel Installers in the UK?
1. Heatable Solar
Heatable is an MCS-certified solar panel installer offering nationwide service. They exclusively install REA Fusion panels with a 25-year warranty, paired with Enphase Microinverters to maximise efficiency.
One of Heatable’s standout features is its free online tool, which provides an instant fixed-price quote based on your property and location, eliminating the need for a home visit.
Heatable differentiates itself by purchasing directly from manufacturers, ensuring competitive pricing without middlemen or aggressive sales tactics.
They provide a 2-year insurance-backed installation warranty and comply with the HIES consumer code. Additionally, their financing options make solar more accessible to homeowners.
After installation, Heatable offers ongoing maintenance and real-time panel-by-panel monitoring, ensuring that systems operate at peak efficiency.
Pros:
- Ongoing aftercare and maintenance
- Instant online fixed quotes
- Nationwide coverage
- Strong industry accreditations
Cons:
- Limited panel options (only installs REA Fusion panels)
What Heatable’s customers say:
“I waited two months to leave this review as I felt it was hard to make a true judgement (straight away). I’m over the moon with my solar and battery installation. The system has far exceeded my expectations” – Andrew Lawton, April 2024
2. Project Solar
As one of the most established solar panel installers in the UK, Project Solar has built a solid reputation.
The company offers an extensive range of products, including Evo Max Super Series panels, SunPower Maxeon panels, PV roof tiles, smart heating systems, and EV chargers.
Project Solar holds accreditations from MCS, HIES, NAPIT, and EPVS, ensuring high installation standards. Their panels come with a lifetime warranty, while their labour warranty lasts 10 years. They also provide 24/7 monitoring for added reassurance.
Pros:
- Strong customer rating of 4.7
- Extensive industry accreditations
- Dedicated 24/7 monitoring
- Lifetime panel warranty
Cons:
- Higher costs compared to competitors
3. Solar Fast
Solar Fast is one of the UK’s fastest-growing solar panel installers, having installed over 47,000 panels. They prioritise customer experience and affordability, offering flexible financing options.
Their Tier 1 DMEGC Solar panels have an efficiency rate of 22.02%, and they back their products with a 30-year performance warranty and a 25-year product warranty. Additionally, they hold accreditations from MCS, HIES, and EPVS.
Pros:
- Highly accredited
- 30-year performance guarantee
- Nationwide service
Cons:
- Reports of aggressive sales tactics
4. Solar4Good
A newer but rapidly growing installer, Solar4Good is known for making solar energy accessible and affordable. The company completes between 1,200 and 1,500 installations annually and offers products from top brands like JA Solar, Jinko Solar, and Trina Solar.
They provide a price-match guarantee and a fast turnaround, with installations completed in as little as two weeks. Their customer service has earned high praise, with over 90% of reviews on Trustpilot being 5 stars.
Pros:
- Affordable pricing with a price match guarantee
- Quick installation turnaround
- Strong customer reviews
Cons:
- Some reports of aggressive sales tactics
Related solar guides:
- How many solar panels do you need?
- Smart Export Guarantee
- Can you install solar panels in a conservation area?
- Best 4kw solar system with battery storage
- Sunshine hours map UK
- Best Solar Panels
- Solar panel output calculator
Factors to Consider When Choosing a Solar Panel Installer
1. Accreditations and Certifications
Ensure the installer is accredited by the Microgeneration Certification Scheme (MCS), as this is necessary for eligibility in government-backed incentive schemes. Other important certifications include HIES, EPVS, TrustMark, and NICEIC.
2. Cost vs. Quality
Low prices can be appealing, but quality should never be compromised. Obtain multiple quotes and compare warranty offerings to make an informed decision.
3. Warranty Protection
Look for comprehensive warranties that cover both equipment and labour. A good warranty can safeguard against future expenses related to repairs or replacements.
4. Customer Ratings and Reviews
Read reviews on platforms like Trustpilot to gauge reliability and customer satisfaction. Be cautious of installers with frequent complaints about poor after-sales support or misleading pricing.
5. Panel and Inverter Brands
Different installers offer different brands of panels and inverters. Research the brands available to ensure you choose high-efficiency, durable products with good warranty support.
What to Avoid When Choosing a Solar Installer
- Very low prices – This may indicate inferior quality components or poor installation practices.
- Hard-selling tactics – Trustworthy installers provide clear information without pressuring you.
- Vague contract details – Ensure everything is clearly documented before committing.
- Poor online reviews – Look for consistent customer feedback rather than relying on a single review.
Final Thoughts
Investing in solar panels is a long-term commitment, and selecting the right installer is essential to ensure you receive a high-quality system with strong aftercare support.
By considering the factors outlined above, you can make an informed choice and enjoy the benefits of clean, renewable energy for years to come.