Best Solar Panel Installers/Companies UK 2026

Last Updated on January 17, 2026

The best solar panel installers can ensure quality, safety, and financial benefits for your solar installation while guaranteeing adherence to high industry standards.

Installing solar panels is one of the quickest ways to ensure a cleaner future and protect your family or business from unpredictable energy bills. Achieving a significant increase in solar deployment across the country is also one of the UK government’s strategies to support the delivery of clean power by 2030.

The decision to go solar often stalls at the point of choosing an installer. The UK market has thousands of local firms, national providers, and new entrants, all promising high savings and seamless installations. Sorting genuine expertise from polished sales messaging takes time, research, and a clear understanding of what actually matters in a quality installation.

A review of the best solar panel installers, based on factors like industry accreditations, customer satisfaction, warranty protection, installation standards, and aftercare support, can help you narrow the field. It can give you a clearer path to finding an installer that delivers reliable performance, long-term value, and confidence at every stage of the switch to solar.

Quick Glance at the Best Solar Panel Installers:

Project Solar UK – Best for nationwide coverage and long warranties.
Solar4Good – Best for customer service and detailed system planning.
Otovo – Best for flexible finance options.
Glow Green – Best for whole home energy improvements.
Solar Fast (Wickes Solar) – Best for fast, straightforward installations.

How the Best Solar Panel Installers Were Assessed

Choosing a solar installer is not about finding the biggest brand or the lowest headline price. Quality sits in the details, and those details are often invisible until something goes wrong. This assessment focuses on the factors that genuinely influence solar panel efficiency, performance, reliability, and long-term value.

Industry Accreditations and Compliance

Assessment included recognised UK certifications, including MCS, RECC, and TrustMark membership. These accreditations demonstrate technical competence, consumer protection, and adherence to industry regulations. We excluded installers without clear, verifiable compliance.

Customer Experience and Satisfaction

Verified customer feedback played a central role. This includes consistent review scores across platforms such as Trustpilot and Google Reviews, along with patterns in complaints, responsiveness, and aftercare.

Installation Quality and Technical Standards

Attention was given to how systems are designed and installed, including roof assessments, electrical work, and commissioning standards. Preference was given to installers using in-house trained teams rather than widespread subcontracting.

Warranties and Aftercare Support

Quality guarantees, product warranties, and post-installation support were reviewed to understand how installers protect customers once the system is live.

Transparency and UK Coverage

Clear pricing, honest timelines, and realistic performance expectations were prioritised, alongside national or regional coverage that matches different homeowner needs.

Together, these criteria ensure the installers listed deliver more than promises. They provide systems built to perform safely and reliably over decades.

In the video below, we explain how to vet solar panel installers:

Best Solar Panel Installers in the UK

The installers listed below stand out for consistent installation quality, customer care, and long-term system reliability. Each profile focuses on how the company operates in practice.

Project Solar UK

Project Solar UK is one of the most established nationwide solar installers, with a strong focus on large-scale residential deployment. The company manages the whole installation process in-house, from initial survey through to commissioning, which gives homeowners a clearer line of accountability and more predictable timelines.

Coverage spans most of England, Scotland, and Wales, making Project Solar UK a practical option for households seeking a single provider that can handle everything from roof assessment to grid connection. The company is MCS certified and operates within recognised consumer protection schemes, helping ensure installations meet current regulatory standards.

One of its main strengths is the warranty provision. Project Solar UK offers extended product warranties alongside labour guarantees, providing reassurance for homeowners focused on long-term performance rather than short-term savings. Systems typically prioritise efficiency and output rather than minimal upfront cost.

This installer is particularly well-suited to homeowners looking for a comprehensive, professionally managed installation with strong aftercare support. Those seeking ultra-low budget systems may find alternative providers more suitable, but for reliability and scale, Project Solar UK remains a leading option.

Solar4Good

Solar4Good has built a strong reputation as a customer-focused solar installer with nationwide reach and a clear emphasis on long-term system performance. Rather than pushing one-size-fits-all packages, the company designs systems around household energy use, roof orientation, and future demand, including electric vehicles and battery storage.

Installations are carried out by qualified teams operating under MCS certification, with clear documentation provided at handover. Customers regularly highlight the clarity of communication during the design and installation stages, which helps reduce uncertainty around timelines, access requirements, and system output.

Warranty coverage is competitive, with long panel performance guarantees and standard workmanship protection that aligns with industry expectations. Solar4Good also places strong emphasis on post-installation support, offering guidance on monitoring systems and optimising generation once the system is live.

This installer suits homeowners who value detailed system planning and a consultative approach rather than a fast-turnaround sales approach. It appeals to those looking for balanced pricing, dependable aftercare, and systems designed for consistent, long-term returns rather than headline promises.

Otovo

Otovo takes a different approach to solar installation, positioning itself as a technology-led platform that connects homeowners with vetted local installers. This model allows Otovo to offer broad UK coverage while maintaining flexibility in system design and installation scheduling.

An MCS-certified local partner handles the installation, with Otovo overseeing system design, quality standards, and customer support. This layered approach provides homeowners with a single point of contact while still benefiting from local installer expertise and regional knowledge.

One of Otovo’s standout features is its flexible finance offering. In addition to traditional purchase options, the company offers subscription-style models that spread costs over time and reduce upfront investment. This can appeal to households looking to adopt solar without a large initial outlay, particularly when combined with battery storage.

Warranty protection is robust, covering panels, inverters, and performance expectations, with clear documentation provided at completion. Otovo suits homeowners who prioritise financial flexibility and digital management tools. Those who prefer a single in-house installation team may prefer a more traditional installer model, but for accessibility and modern delivery, Otovo remains a strong contender.

Glow Green

Glow Green is an established UK installer with a long track record across multiple home energy improvements, including solar panels, insulation, and heating upgrades. This broader experience allows the company to approach solar installations with a whole-home perspective rather than treating panels as a standalone upgrade.

The company operates across much of Great Britain and works within recognised certification schemes, including MCS compliance for solar installations. Systems can integrate smoothly with existing electrical infrastructure, which can be particularly valuable for older properties or homes with previous efficiency upgrades.

Glow Green features balanced pricing and a practical approach to installation. Customers frequently highlight clear explanations during surveys and realistic expectations around output and payback. Warranty offerings follow standard industry structures, with panel and inverter coverage supported by quality guarantees.

This installer suits homeowners who want solar panels as part of a wider efficiency improvement plan, or who value experience across multiple retrofit measures. Those seeking premium warranties or highly customised system designs may find specialist providers better aligned, but Glow Green remains a dependable option for straightforward residential installations.

Solar Fast (Wickes Solar)

Solar Fast, part of the Wickes Solar network, specialises in efficient, streamlined installations for residential properties across Great Britain. The company focuses on speed and simplicity, providing homeowners with clear timelines and a straightforward process from survey to commissioning.

MCS-certified teams conduct installations, ensuring compliance with industry regulations and safety standards. While some elements of the process may be subcontracted, Solar Fast maintains oversight of system quality and final handover documentation. The company also coordinates grid connection and export registration, reducing administrative burden for the homeowner.

Warranty coverage includes standard panel and inverter guarantees alongside short-term workmanship protection. While not the longest warranties on the market, these align with industry norms and provide adequate reassurance for most households.

This installer suits homeowners seeking a reliable, fast installation without extensive customisation or add-ons. Solar Fast is ideal for standard residential systems that need efficiency and predictability instead of bespoke system design or advanced finance options. Those seeking specialist energy storage integration or long-term performance guarantees may prefer larger nationwide providers.

Sunsave

Sunsave offers a distinctly different route into solar by focusing on long-term affordability and simplicity rather than outright ownership from day one. It removes common barriers such as high upfront costs and complex decision-making, making solar more accessible to a broader range of households.

Instead of purchasing a system outright, customers pay a monthly fee that covers system design, installation, monitoring, maintenance, and insurance. MCS-certified partners perform installations, with Sunsave overseeing quality control, system performance, and ongoing support. This structure reduces risk for homeowners who prefer predictable costs and minimal responsibility for upkeep.

Sunsave suits homeowners who want the benefits of solar without a large upfront investment or long-term maintenance concerns. It appeals to those who value convenience and cost certainty. Households focused on full ownership or custom system configurations may prefer a traditional installer, but for ease and accessibility, Sunsave presents a compelling alternative.

Geo Green Power

Geo Green Power is a well-established UK installer specialising in solar PV systems combined with battery storage and smart energy management. The company operates nationwide and can handle more complex installations that go beyond basic panel setups.

MCS-certified teams perform installations, with a strong emphasis on system design and integration. Geo Green Power regularly works with battery storage, home EV chargers, and heat pump-compatible systems, making it a strong choice for households planning broader energy upgrades.

Warranty coverage aligns with industry expectations, with long panel performance guarantees and clear workmanship protection. Customers often cite detailed surveys and thorough commissioning as strengths, particularly for properties with higher energy demand or future expansion plans.

This installer suits homeowners looking for a more advanced solar solution, especially where battery storage or future-proofing is a priority. Those seeking the lowest upfront cost or a very simple installation may find more streamlined providers a better fit. For technical capability and integrated energy systems, Geo Green Power stands out.

Quick Comparison of the Best Solar Panel Installers in the UK

With so many installers operating across the UK, side-by-side comparison makes meaningful differences easier to spot. The table below highlights practical factors that most often influence a homeowner’s decision.

Installer	UK Coverage	Customer Rating	Warranty Strength	Finance Options	Best For
Project Solar UK	Nationwide	Excellent	Lifetime product + 10-yr labour	Some financing	Full-service national installs with strong warranties
Solar4Good	Nationwide	Very strong	25-year panel & performance	Standard purchase	Reliable installs with excellent service
Glow Green	Great Britain	High	Standard insurance-backed	Standard purchase	Good value and long experience
Solar Fast (Wickes Solar)	Great Britain	Good	2-year labour + panel warranties	Standard purchase	Fast turnaround installs
Otovo	Broad UK coverage	Strong	Up to 30-year performance	Subscription + loan options	Flexible finance choices
Effective Home	Nationwide	Very good	~25-year panel	Standard purchase	Good balance of cost + quality
Sunsave	England & Wales	Very good	Long subscription model	Subscription all-inclusive	Low upfront cost, long-term value
Geo Green Power	Nationwide & regional	Very good	Standard 25-30 years	Standard purchase	Great for integrated storage systems

National vs Regional Solar Panel Installers

Solar panel installers in the UK generally fall into two categories. Large national providers and smaller regional specialists. Each approach offers distinct advantages depending on property type, location, and expectations around service.

Choosing a National Installer

National installers typically offer broader coverage, standardised processes, and greater capacity to handle high installation volumes. This can result in clearer timelines, consistent documentation, and established aftercare systems. Larger companies often have dedicated customer service teams and long-standing supplier relationships, which can support warranty claims and technical queries years after installation.

National providers suit homeowners who value stability, recognisable accreditation, and predictable delivery. They can also be a safer option for households concerned about installer longevity and long-term support.

Choosing a Regional Installer

Regional installers tend to operate within a smaller geographic area, allowing for local knowledge and more personalised service. This can be particularly beneficial for properties with unusual roof structures, planning considerations, or access constraints. Smaller teams may also offer greater flexibility around scheduling and system customisation.

Regional installers suit homeowners who prefer direct contact with the installation team and a more hands-on approach. They can deliver excellent quality when properly accredited, although long-term support should be assessed carefully.

Which Option Is Right?

The best choice depends on priorities. National installers suit those seeking scale and reassurance. Regional installers appeal to homeowners who value local expertise and personal service. Verifying accreditation, warranties, and aftercare matters more than installer size alone.

What a High Quality Solar Installation Should Include

A successful solar installation involves far more than mounting panels on a roof. The quality of planning, installation, and handover directly affects system performance, safety, and long-term reliability. Understanding what an installer should include helps homeowners recognise good practice and avoid costly oversights.

Pre-Installation Survey and System Design

A thorough site survey should assess roof condition, orientation, shading, and structural suitability. Installers should also assess electrical capacity and household energy use so they can size the system appropriately. Skipping this step often leads to underperforming systems.

Safe and Compliant Installation

Installations should follow UK electrical and building regulations, with scaffolding, cabling, and inverter placement handled professionally. A qualified engineer should complete all the work using certified equipment.

Grid Connection and Certification

A quality installer manages grid notifications and ensures the system is registered correctly for export payments where applicable. Homeowners should receive full MCS certification and compliance documentation at completion.

System Commissioning and Handover

Before the installer signs off, they should test, commission, and explain it to you clearly. Monitoring access, warranty documents, and maintenance guidance should be provided in a complete handover pack.

Aftercare and Support

Reliable installers remain accessible after installation. Clear contact routes for faults, performance issues, or warranty claims are essential for long-term confidence.

Knowing these elements sets clear expectations and helps homeowners assess installer quality beyond sales promises.

Solar Panel Warranties Explained

Warranties play a crucial role in protecting your investment, yet they are often misunderstood or presented unclearly. Knowing what each warranty covers helps avoid unpleasant surprises years after installation.

Product and Performance Warranties

Solar panels typically come with two forms of protection. Product warranties cover manufacturing defects, while performance warranties guarantee a minimum level of output over time. Most quality panels offer long performance coverage, ensuring energy generation remains efficient for decades.

Inverter Warranties

Solar inverters convert solar energy into usable electricity and usually have shorter lifespans than panels. Standard inverter warranties are shorter, with extended options sometimes available. Understanding replacement costs and coverage is essential when comparing quotes.

Workmanship Guarantees

Workmanship warranties cover the quality of installation itself. These protect against issues such as poor mounting, faulty wiring, or water ingress. Strong installers offer clear, written guarantees supported by insurance where possible.

What Happens if an Installer Stops Trading?

Insurance-backed warranties protect you if an installer is no longer operating. This ensures repairs or replacements can still be carried out, safeguarding long-term system performance.

Clear, documented warranty terms are a sign of a reputable installer and should always form part of the final decision.

Solar Installation Costs and Finance Options

Solar installation costs in the UK vary widely depending on system size, equipment quality, and installation complexity. According to the Energy Saving Trust, 3.5 kWp domestic solar panel systems cost around £6,100. Understanding how pricing works makes it easier to compare quotes and avoid misleading offers.

Typical Solar Installation Costs

For most households, solar panel costs are influenced by the number of panels, inverter type, and whether battery storage is included. Roof access, scaffolding requirements, and electrical upgrades can also affect pricing. Reliable installers provide itemised quotes that explain these factors clearly.

What Affects the Final Price

System design choices, panel efficiency, and installation difficulty all play a role. Homes with complex roof layouts or limited access may require additional labour or materials. Transparent pricing reflects these realities rather than masking them behind headline figures. A solar panel cost calculator can provide you with an estimate.

Finance and Payment Options

While it can be challenging to get free solar panels, many installers offer financing to reduce upfront costs. Options may include low-interest loans, staged payments, or subscription-style models that bundle installation, maintenance, and monitoring into a monthly fee. Each approach has different long-term implications and should be reviewed carefully.

Red Flags to Watch For

Unrealistically low quotes, vague savings claims, and pressure sales tactics often signal compromises elsewhere. A quality installer focuses on accurate projections and clear terms rather than urgency.

A well-explained quote builds confidence and helps ensure savings materialise as expected.

Questions to Ask Before Choosing a Solar Panel Installer

Asking the right questions helps cut through sales language and reveals how an installer actually operates. Clear answers are often a stronger indicator of quality than pricing alone.

Who Will Carry Out the Installation?

Confirm whether in-house engineers or subcontractors complete the work. Knowing who is responsible on the day helps clarify accountability and standards.

How Is the System Designed?

Ask how your energy usage, roof layout, and future plans are factored into the design. A good installer explains why particular system or solar panel sizes are recommended rather than presenting a fixed package.

What Is Included in the Quote?

Ensure scaffolding, electrical work, monitoring equipment, and grid registration are clearly listed. Missing items can lead to unexpected costs later.

How Long Does Installation Take?

Request a realistic timeline covering survey, installation, and commissioning. Reliable installers set expectations clearly and avoid vague scheduling.

What Happens After Installation?

Ask how faults, performance issues, or warranty claims are handled. Ongoing support matters long after the panels are switched on.

What Documentation Is Provided?

Confirm you will receive MCS certification, warranty paperwork, and system handover information. These documents are essential for export payments and future property sales.

Clear answers to these questions signal professionalism and help ensure a smoother installation experience from start to finish.

Common Solar Installer Mistakes to Avoid

Most solar installation problems are avoidable. They tend to arise when vital details are overlooked or when decisions are rushed. Understanding common mistakes helps protect both performance and long-term value.

Choosing on Price Alone

Low quotes can be appealing, but they often reflect compromises in system design, equipment quality, or aftercare. A system that underperforms or requires early repairs can cost more over time than a well-designed installation.

Overstated Savings Claims

Installers should provide realistic projections based on roof orientation, shading, and household usage. Claims that guarantee unusually high savings without clear assumptions should be treated with caution.

Missing or Unclear Accreditation

Reputable installers are transparent about certification and consumer protection. Lack of verifiable MCS registration or warranty backing increases risk.

Vague Warranty Terms

Warranty coverage should be specific and documented. Unclear wording around quality or responsibility can lead to disputes if issues arise.

Pressure Sales Tactics

High-pressure discounts and short decision windows are warning signs. Quality installers allow time for consideration and comparison.

Avoiding these mistakes supports a smoother installation and ensures solar delivers the benefits it promises over the long term.

Final Thoughts on the Best Solar Panel Installers

Choosing the right solar panel installer is one of the most critical decisions in the move to renewable energy. The installer you select influences system performance, safety, and financial returns for decades, not just at the point of installation.

A high-quality installer combines technical competence with clear communication, transparent pricing, and dependable aftercare. Accreditations, warranties, and customer feedback provide valuable signals, but they are most effective when viewed together rather than in isolation. Taking time to compare options, understand what is included, and ask informed questions helps reduce risk and builds confidence.

Solar technology continues to improve, but even the best equipment depends on correct design and installation to deliver consistent results. An installer who takes time to understand your property and energy needs is more likely to deliver a system that performs reliably and supports long-term savings.

By focusing on quality, accountability, and long-term support, homeowners and businesses can approach solar installation with clarity rather than uncertainty. A considered choice today helps ensure clean, affordable energy well into the future, supporting both household resilience and broader sustainability goals across the UK.

FAQs on the Best Solar Panel Installers

Who Are the Best Solar Panel Installers in the UK?

The best solar panel installers are those that combine strong accreditation, consistent customer satisfaction, clear warranties, and reliable aftercare. Installers such as Project Solar UK, Solar4Good, Otovo, Geo Green Power, Sunsave, Glow Green, and Solar Fast are frequently recognised for meeting these standards across different homeowner needs.

Who Is the Most Reputable Solar Panel Company?

Reputation is built on long-term performance rather than brand visibility alone. Companies with MCS certification, insurance-backed warranties, transparent pricing, and stable customer reviews across multiple platforms tend to be the most reputable. National installers with established track records often score highly for reliability and ongoing support.

What Are the Top 10 Solar Companies?

Top solar companies typically include a mix of national providers and specialist installers. Rankings vary depending on criteria such as warranty strength, customer service, finance options, and technical capability. The strongest lists prioritise verified reviews and compliance over sales volume.

Which Company Is Better for Solar Panels?

The better company depends on individual priorities. Some installers excel in fast, straightforward installations, while others specialise in battery storage, flexible finance, or long-term performance guarantees. Matching installer strengths to household needs delivers the best outcome.

Who Is the Best Solar Provider?

There is no single best provider for every household. The best provider is one that designs a system around your property, explains costs clearly, and remains available for support after installation.

How To Pick A Good Solar Company?

Look for MCS accreditation, clear warranties, realistic savings estimates, and consistent customer feedback. A good installer explains system design choices and avoids pressure-based sales.

Related solar guides:

Sources and References

GOV.UK – Solar roadmap: United Kingdom powered by solar
Energy Saving Trust – Solar panels