Best Solar Panel Installers in the UK (2025/2026 Reviews)
We compare the top rated UK solar companies including Octopus Energy, Solar4Good, and Heatable. Unbiased reviews based on service, warranty, and price.
Choosing the right installer is just as important as choosing the right panels. A poor installation can lead to leaks, lower efficiency, and voided warranties.
🏆 Our Ranking Criteria
We analyzed companies based on: MCS Certification (Essential for SEG), Trustpilot Scores, Warranty Length (Labour & Product), and Pricing Transparency.
1. Octopus Energy Top Pick
Octopus Energy has revolutionized the UK energy market and their solar division is no exception. They offer a seamless "one-stop-shop" experience: they install the system, set up your smart meter, and instantly put you on their high-paying export tariffs (like *Intelligent Octopus*).
The Good
- ✅ Seamless integration with Smart Tariffs
- ✅ High quality hardware (GivEnergy, Enphase)
- ✅ 5-Year Workmanship Warranty
The Bad
- ❌ Can have long waiting lists (2-3 months)
- ❌ Not the cheapest option on the market
2. Solar4Good
Consistently rated #1 for customer service. Solar4Good is a nationwide installer known for tailored designs rather than "off-the-shelf" packages. They offer a massive range of panels including premium all-black options.
The Good
- ✅ Exceptional communication & support
- ✅ Range of panel choices (Trina, JA Solar, REC)
- ✅ Quick installation turnaround
The Bad
- ❌ Sales process can be thorough (slower quotes)
3. Heatable
Best for speed and fixed-pricing. Heatable uses a tech-first approach allowing you to get an instant fixed-price quote online without speaking to a salesperson. They exclusively use premium REA Fusion panels.
The Good
- ✅ Instant fixed-price online quotes
- ✅ Exclusive 25-Year Warranty on Fusion panels
- ✅ 0% Finance options available
The Bad
- ❌ Fixed package means less customization
- ❌ Only offer one type of panel brand
4. Project Solar UK
One of the UK's largest independent installers. They are known for their lifetime warranty options and extensive national coverage. Great for peace of mind if you want a company that's "too big to fail".
The Good
- ✅ Lifetime warranty options available
- ✅ Huge national network of installers
The Bad
- ❌ Use sub-contractors (quality can vary slightly)
- ❌ Sales tactics can be more aggressive
⚠️ Avoid "Free Solar" Scams
Unless you are applying for the legitimate ECO4 grant (via your energy supplier), be wary of cold callers offering "free panels". These are often "Rent-a-Roof" schemes that can make your home difficult to sell. Always check for MCS certification.