The 10 Best Solar Panel Companies in The UK (2026)
If you’re looking for the best UK solar panel companies, you’ll probably wondering who’s the largest, best rated, and do they operate near me?
In this guide, we review 10 UK-based solar companies with scores above 4.0/5.0 on TrustPilot, based on hundreds of verified reviews.
- Our top 10 solar companies list includes: Project Solar UK, ESE Group, Diamond Green Energy, Effective Home, A Shade Greener, Greener Energy Group, Efficient Home Energy, HomeSmart Installations, Solar Fast and Infinity Renewables.
- The companies are listed based on their number of TrustPilot reviews.
- No company had paid to be on this list.
Choosing high-quality solar panels is key if you’re considering a photovoltaic (PV) system for your home. However, hiring a qualified installation company is equally important. Even the best solar panels can give you trouble if they are not installed properly, and manufacturers will normally void their warranties if there is evidence of an incorrect installation.
Compare My Solar Prices
Get quotes from local installers
1 fast form = 4 low quotes
Save up to £703 per year
You should look for a solar installation company who is technically qualified for domestic PV installations. Your solar installer should also be accredited under the Microgeneration Certification Scheme (MCS), which is endorsed by the UK Department of Energy and Climate Change (DECC).
- Many companies offer additional products such as solar battery systems and EV chargers, or services such as solar panel cleaning and 24/7 monitoring.
- Having access to financing options is also great: you can go solar at zero upfront cost, and your power bill savings can pay off the loan over time.
- If your council or electric company offers local solar incentives, you should look for an installation company who is familiarised with their requirements.
Choosing a Solar Company: General Recommendations
Your home solar system should have a fair price, regardless of the chosen provider. According to the UK Department of Energy Security and Net Zero (DESNZ), you can expect to pay around £2,365 per kilowatt (kW) when installing solar panels in a UK house. Note that prices can vary depending on local labour costs, the complexity of your roof and other site-specific factors.
The DESNZ calculates average solar installation costs in the UK, using data from the Microgeneration Certification Scheme (MCS). Here are the mean prices reported for solar panel systems of different sizes:
Size Range | Mean Price per Kilowatt (kW) |
0-4 kW | £2,365 per kW |
4-10 kW | £2,100 per kW |
10-50 kW | £1,351 per kW |
Some cost variation above and below the average values is normal, but you should be wary of solar offers with excessively high or low prices.
For example, if you get a very low price such as £4,000 for a 4-kW solar system (£1,000/kW), ask the provider if they are subtracting any solar incentives. On the other hand, if you get a very high price such as £20,000 for a 4-kW system (£5,000/kW), ask if they are including additional features such as a battery bank or electric vehicle (EV) charger.
The following are some “red flags” to watch out for when comparing solar companies:
- High-pressure sales tactics: Watch out for companies who want to make you sign an agreement ASAP, without giving you time to check other options.
- Not offering an initial consultation: A home solar system can only be designed properly with an assessment of your energy bills, roof layout and sunshine conditions. If you accept a premade solar design, it may end up being oversized for your home. In this case, you pay for extra kilowatts of capacity that are not used.
- Offering “free solar panels”: Solar installers who offer free panels are not necessarily scammers, but they are not being fully honest. Generally, they are offering a solar lease with another name. You pay £0 upfront, but you commit to monthly payments for up to 25 years. Reputable solar companies are more transparent with their language, and they will clearly state that you are signing a lease agreement.
- Solar offers that don’t specify equipment brands: There are many solar manufacturers in the market, and not all of them offer the same quality. If a solar company does not specify equipment in their offers, they are probably using low-tier brands.
In the following sections, we will compare 10 solar installation companies who have an excellent track record in the UK. We will discuss their product and services, and their pros and cons from an unbiased point of view.
1) Project Solar UK
TrustPilot Score | 4.4/5.0 based on 4,019+ reviews |
Foundation Year | 2011 |
Purchasing Options | Cash purchase Finance options |
Warranty Terms | 40-year warranty for SunPower Maxeon panels Lifetime warranty for Evolution Super Max Series |
Office Locations | Northwest and Midlands |
Additional Products and Services | Energy storage systems, 24/7 monitoring, smart home systems, smart heating controls, EV charging stations, solar roof tiles |
Website |
Project Solar UK is one of the most experienced solar companies in the UK, with a track record of more than 45,000 installations completed. They install two solar panel brands:
- SunPower Maxeon
- Evolution Super Max Series
These are two of the best solar panel brands you can find in the UK. SunPower panels have an efficiency of up to 23%, the highest in the industry, while being covered by a 40-year warranty. The Evolution Super Max Series has 21.01% efficiency and a lifetime warranty.
In addition to having an excellent score on TrustPilot and over 4,000 reviews, Project Solar UK holds multiple accreditations, including:
- Trustmark
- National Association of Professional Inspectors and Testers (NAPIT)
- ISO 9001: 2015
- Energy Performance Validation Scheme (EPVS)
- Home Insulation & Energy Systems Contractors Scheme (HIES) Accrediter Member
Project Solar UK offers both traditional solar panels and solar roof tiles. They also install Cürv smart home systems, Owl heating controls and Project EV charging stations.
2) ESE Group
TrustPilot Score | 4.8/5.0 based on 3,695+ reviews |
Foundation Year | 2015 |
Purchasing Options | Cash purchase 7-year finance options |
Warranty Terms | 26-year solar panel warranty 12-year battery system warranty |
Office Locations | Liverpool, County Durham and Exeter |
Additional Products and Services | Energy storage systems, 24/7 monitoring, EV charging stations, solar system maintenance |
Website |
ESE Group also ranks among the largest solar installers in the UK, with more than 14,000 customers served as of 2023. They install LONGi and DMEGC solar panels, which are characterised by their quality and efficiency. ESE Group also provides solar inverters and energy storage systems from leading manufacturers: SolarEdge, Myenergi, Tesla, LuxPower, Greenlinx, Pylontech and Tigo.
ESE Group offers a 3-6 week installation timeline, starting from the moment you pay an initial £1,000 deposit. They also offer a price match guarantee if you show competing quotes with equipment of comparable quality. If you purchase a home solar system, ESE Group provides free maintenance for 17 years. Normally, this service would have a total cost of around £3,600.
ESE Group holds several accreditations, which include:
- Registered Competent Person – Electrical
- National Inspection Council for Electrical Installation Contracting (NICEIC) Domestic Installer
- Flexi-Orb – Consumer Safety and Protection
- United Kingdom Accreditation Service (UKAS) Quality Management
- SafeContractor Approved
3) Diamond Green Energy
TrustPilot Score | 4.9/5.0 based on 1,715+ reviews |
Foundation Year | 2011 |
Purchasing Options | Cash purchase Finance options, including 0% APR |
Warranty Terms | 25-year warranty solar panel warranty from LONGi |
Office Locations | Fareham |
Additional Products and Services | Boilers, air conditioners, EV charging stations, battery systems, heat pumps, home equipment maintenance |
Website |
Diamond Green Energy started as a small family-owned business, originally focused on gas installations and heating equipment. Their product offering now includes solar panels, battery systems and EV chargers. Diamond Green Energy uses the following equipment brands:
- LONGi solar panels
- SolaX Power inverters and energy storage systems
- Solis inverters
The company is headquartered in Fareham, but they also serve other areas: Portsmouth, Southampton, Bournemouth, Brighton, Basingstoke and Farnborough. They also offer various financing options, including 0% APR plans ranging from 1-10 years.
Like most leading solar companies, Diamond Green Energy holds several accreditations, including: MCS Certified, HIES Consumer Code, NAPIT and Trustmark.
4) Effective Home
TrustPilot Score | 4.3/5.0 based on 1,633+ reviews |
Foundation Year | 2008 |
Purchasing Options | Cash purchase Finance options up to 120 months, 10.9% APR |
Warranty Terms | 25-year solar panel warranty 10-year battery warranty |
Office Locations | Doncaster (HQ), Hampshire and Leicester |
Additional Products and Services | Energy storage systems, energy monitoring, boilers, air-source heat pumps, heating controls, home insulation |
Website |
Effective Home focuses on overall home energy performance, and they install space heating equipment and insulation in addition to solar panels. They offer a wide range of financing options for all the equipment types provided.
- Effective Home has helped their customers save over £250 million in energy costs, while avoiding 8 million tonnes of CO2 emissions.
- The company offers a free initial consultation, which can be virtual or in-person.
Effective Home does not specify the solar brands they work with, but their website mentions that their PV panels have a 25-year warranty. They also install Sunsynk batteries, which are covered by a 10-year warranty. Effective Home gives you the option of adding a battery to an existing solar array, even if it was installed by another company.
Here are some of the accreditations held by Effective Home: MCS Certified, EPVS, Trustmark, Green Deal Approved, NICEIC Domestic Installer and HIES Consumer Code. They have a staff of over 200 employees working across the UK.
5) A Shade Greener
TrustPilot Score | 4.5/5.0 based on 1,349+ reviews |
Foundation Year | 2010 |
Purchasing Options | Cash purchase Solar panel leasing |
Warranty Terms | Not specified |
Office Locations | Tankersley |
Additional Products and Services | Energy storage systems, biomass heating systems, vermin protection systems, energy monitoring, maintenance services, temporary solar panel removal for roofing work |
Website |
A Shade Greener offers both solar panel systems and biomass heaters. Their installations have generated over 1 billion kWh of green energy, preventing over 1.16 million tonnes of CO2 emissions. According to TrustPilot, the company has installed over 70,000 solar PV systems across the UK.
- Although A Shade Greener has excellent reviews on TrustPilot, the company does not specify the solar panel and battery brands they install.
- Their official website also lacks information about their warranty conditions.
A Shade Greener is MCS Certified, which means their solar panel systems can sell excess energy to the National Grid under the Smart Export Guarantee (SEG).
6) Greener Energy Group
TrustPilot Score | 4.4/5.0 based on 1,337+ reviews |
Foundation Year | 2014 |
Purchasing Options | Cash purchase Finance options, including 0% APR |
Warranty Terms | 25-year solar panel warranty 10-year battery warranty |
Office Locations | Paisley (HQ), Aberdeen, Inverness |
Additional Products and Services | Energy storage systems, air-source heat pumps, electric radiant heaters, A+ rated gas boilers, home insulation, EV chargers |
Website |
Green Energy Group provides solar panel systems with a 25-year warranty, but their website does not specify which brands are used. They also install Puredrive batteries, which are made in the UK and covered by a 10-year warranty. Puredrive batteries are capable of interacting with smart electric tariffs to maximise your power bill savings.
- Green Energy Group offers a free initial consultation, to determine the optimal solar PV system size for your home and identify other promising upgrades.
- They also have a referral program: if you recommend the company and your contact purchase a home upgrade with a price of £2,000 or more, you get a £100 commission.
Like many other leading solar companies, Green Energy Group holds several accreditations, including: HIES Accredited Member, EPVS, MCS Certified, NAPIT and Trustmark. They operate in Scotland and some northern areas of England.
7) Efficient Home Energy Ltd
TrustPilot Score | 4.9/5.0 based on 1,244+ reviews |
Foundation Year | 2015 |
Purchasing Options | Cash purchase Finance options |
Warranty Terms | 25-year warranty for Sharp solar panels 15-year warranty for AEG solar panels |
Office Locations | Bromley |
Additional Products and Services | Energy storage systems, electrical services, gas services, plumbing, space heating, air conditioning, fire protection systems, Energy Performance Certificates (EPC), landlord certificates |
Website |
Efficient Home Energy offers many types of equipment for homeowners and landlords, including solar panel systems.
- They install PV modules from brands such as Sharp and AEG, combined with high-quality inverters from brands such as Growatt.
- They offer a free initial survey to determine if your home is suitable for solar panels, while identifying other opportunities to save energy.
This company is a good option if you require other services or home upgrades, in addition to your solar panel system. They have experience with electrical, gas and Energy Performance Certificates (EPC). In case you need more than one certificate, they offer bundled prices.
Efficiently Home Energy operates in London and the South East. Their accreditations include MCS, NICEIC and Gas Safe Register.
8) HomeSmart Installations Ltd
TrustPilot Score | 4.8/5.0 based on 1,204+ reviews https://uk.trustpilot.com/review/homesmartinstallations.co.uk |
Foundation Year | 2018 |
Purchasing Options | Cash purchase Third-party finance options |
Warranty Terms | 10-year insurance backed guarantee 25-30 year solar panel lifespan (warranty terms not specified) |
Office Locations | Southampton |
Additional Products and Services | Energy storage systems, windows, doors, roofline, insulation, conservatories, garage doors, block paving, patios |
Website |
HomeSmart Installations is a home improvement company with a track record of over 3,000 projects, which includes solar panel installations. Their website does not specify which solar brands are used in their systems, but the pictures on their project gallery show monocrystalline panels with half-cut cells. This type of PV module is characterised by its superior efficiency.
HomeSmart holds several accreditations:
- EPVS Certified for Energy Storage and Solar PV
- MCS Approved Contractor
- NICEIC Approved Contractor
- Quality Assured National Warranties (QAWN)
- Assure Certification
The company also has an internal certification for their installers, which is called HomeSmart Approved. Their installers must follow a set of guidelines to ensure high-quality workmanship in all projects.
9) Solar Fast
TrustPilot Score | 4.7/5.0 based on 1,078+ reviews |
Foundation Year | 2001 |
Purchasing Options | Cash purchase Finance options – 5, 10 and 15 years |
Warranty Terms | 25-year solar panel warranty 10-15 year inverter warranty 12-year battery warranty 2-year workmanship warranty |
Office Locations | Plymouth, Derby, Brighton, Southampton, Bristol, Edinburgh, Leeds and Glasgow |
Additional Products and Services | Energy storage systems, EV chargers, natural gas services |
Website |
Solar Fast has served over 15,000 customers across the UK, achieving £1,652,000 in energy savings in 2022 alone. According to Financial Times, they are the fastest growing solar company in the UK.
- Their business model focuses on delivering a completed solar system within 7 days of your order.
- They also have a referral program, where you earn £250 for every referred customer who purchases solar panels.
Solar Fast instals monocrystalline panels with 104 half-cells, which are covered by a 25-year warranty. At the end of the warranty period, your panels will still be capable of generating at least 85% of their initial output. However, Solar Fast does not mention their module manufacturer. With respect to energy storage, they install Hanchu ESS and LuxPower batteries.
Solar Fast holds multiple accreditations, which include: EPVS Gold Member, MCS Approved, HIES Accredited Member and Checkatrade Vetted.
10) Infinity Renewables
TrustPilot Score | 4.7/5.0 based on 694+ reviews |
Foundation Year | 2018 |
Purchasing Options | Cash purchase Finance options |
Warranty Terms | 25-year solar panel and inverter warranty 10-year workmanship warranty |
Office Locations | Crawley |
Additional Products and Services | Energy storage, EV chargers, energy monitoring, heat pumps, smart thermostats, energy surveys, solar roof tiles, residential energy price comparison |
Website |
Infinity Renewables has completed more than 3,000 solar installations across the UK. The company works with top solar equipment brands who offer solid warranty coverage:
- Solar panels = Suntech, LG NeON, Panasonic and SunPower
- Solar roof tiles = PV Slate
- Inverters = Enphase, SolaX, Growatt, SolarEdge, Tigo and SMA
- Battery systems = Duracell, SolaX and LG Chem
If you purchase a solar panel system from Infinity Renewables, they provide a calculation of your expected savings. If the system does not perform according to their projections, you get financial compensation to make up for the difference.
Infinity Renewables offers a free initial consultation, which has the goal of analysing your roof conditions and home energy needs. The company holds industry-recognised accreditations such as MCS, HIES and TSI.
Infinity Renewables collaborates with Solar Together, which is a group buying scheme that makes solar installations more affordable for domestic consumers.
Written By
Reviewed By
