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PV Installation Companies in the UK: 1,700+ Active Firms (2026)
PV installation companies in the UK design, fit and maintain solar electricity systems for homes, businesses and public sites.
Buying centres tend to sit in property, estates, facilities management, energy procurement and construction project teams. Domestic work is usually owner-occupier or landlord led, while commercial and industrial projects are more likely to involve facilities teams, finance sign-off and external electrical contractors. Public-sector work adds procurement discipline and site-access constraints. Engagements range from single-roof retrofits to multi-site programmes, with delivery depending on survey, design, supply, installation, commissioning and aftercare rather than sales alone.
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There are 1,728 actively trading PV installation companies in the UK, giving the sector a fragmented contractor base rather than a market made up only of national operators. Reported employment totals 2,300 people, so much of the visible workforce appears to sit in small field teams, project management functions and electrical contracting roles. The commercial end of the cohort is narrower, with many firms still operating below larger-contractor scale.
PV installers operate at the intersection of electrical contracting, construction-site risk and consumer-facing retrofit sales. Domestic jobs tend to require clear pricing, installation standards and aftercare commitments, while commercial and public-site projects add procurement scrutiny, grid-connection sequencing, access planning and site safety documentation. Compliance capability is therefore part of delivery rather than a separate back-office task: project managers, electricians and aftercare teams all affect whether a system is commissioned, handed over and maintained without dispute.
The cohort appears split between local installers handling repeatable domestic work and a narrower contractor tier able to take on commercial, industrial and public-site projects. Consolidation tends to be easier where installers can combine survey, design, field delivery and maintenance, because buyers want one accountable party for performance and faults. Smaller firms may remain viable in local retrofit niches, but larger-site work is likely to favour operators with documented safety processes, scheduling discipline and aftercare capacity.
1,728
Active firms
2026
178
£5M+ operators
Revenue above £5M
202
Recent incorporations
Since 2022
Key facts
About 10% of the trading cohort reports turnover above £5M (178 of 1,728 firms) — the rest sits below that revenue band.
11% of the cohort was incorporated since 2022 (202 firms), so a sizeable share is in its first few filing cycles.
PV installers translate solar demand into installed generating capacity through roof surveys, grid connections, procurement, installation and maintenance.
The contractor base includes residential installers, commercial roof specialists, public-site project teams and maintenance-led providers.
Commercial roof and public-site work tends to involve procurement and handover requirements alongside the physical installation.
Subcontracting choices appear to matter because survey, installation and maintenance work can be kept in-house or split across project partners.
Top UK PV installation companies
YOUR ECO CONSTRUCTION LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns and installs enterprise-scale solar photovoltaic and battery storage systems for commercial, agricultural and estate clients. Provides renewable energy integration for construction projects,…
Sells to organisations needing enterprise-scale solar and battery systems, including commercial businesses, agricultural enterprises, property estates, construction developers and contractors, and…
Financial Health
StrongStrong · Growing, Hiring · 51% CAGR over 4y
Location
JOJU LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns, supplies and installs solar photovoltaic systems, battery energy storage and electric vehicle charging infrastructure for homes, businesses and public sector organisations. Also provides…
Serves UK homeowners, businesses, schools, universities, councils and other public-sector bodies, including offices, factories, warehouses, farms, community energy groups and new-build developers.
Financial Health
WeakWeak · -33% CAGR over 4y
Location
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDesigns, supplies and installs commercial solar photovoltaic systems and related energy infrastructure, including battery storage, EV charging and electrical upgrades. Provides consultancy,…
Serves UK commercial, industrial and public-sector organisations, including schools, universities, healthcare sites, offices, retailers, car dealerships, data centres, manufacturers, farms, logistics…
Financial Health
HealthyHealthy · -89% CAGR over 2y
Location
Sol Group West Yorkshire Ltd
Trajectory
1y · 2025–NowDesigns and installs commercial solar photovoltaic systems for businesses and public sector organisations. Provides solar project planning, installation, operation and maintenance services, along…
Serves UK businesses and public sector organisations, including warehousing, logistics, manufacturing, construction, retail, hospitality, healthcare, education, farming and agriculture operators.
Financial Health
Insufficient historyInsufficient history
Location
INECO ENERGY LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDesigns and installs commercial renewable energy systems including rooftop, ground‑mounted and carport solar PV, battery storage and LED lighting. Provides feasibility studies, project development,…
Serves businesses and public-sector organisations, including manufacturing, leisure, commercial real estate, education providers, councils and retailers seeking to reduce energy costs and carbon…
Financial Health
StrongStrong · Growing, Hiring · 34% CAGR over 2y
Location
Silvercrest Energy Group Ltd
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsDesigns and installs commercial solar photovoltaic systems for businesses and institutions. Provides battery storage integration, power purchase agreement financing, and ongoing operations,…
Serves commercial and industrial businesses, property developers, councils, NHS estates, schools and universities, with emphasis on organisations in the Midlands and South East seeking large-scale…
Financial Health
HealthyHealthy · Hiring · 12% CAGR over 5y
Location
EMTEC ENERGY LIMITED
Trajectory
2y · 2024–NowFinancial sub-scores
Computed from 2 filingsDesigns, supplies and installs commercial renewable energy systems including solar PV arrays, battery storage and EV carports. Provides EPC contracting, grid connection services as an Independent…
Serves UK businesses and organisations with large commercial sites, including utilities, corporate brands and industrial operators pursuing net-zero targets, lower energy costs and grid-ready…
Financial Health
HealthyHealthy · 4% CAGR over 1y
Location
SOL PV GROUP LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides commercial solar PV installation services, designing and installing rooftop and ground‑mounted systems for businesses. Also installs battery storage and EV charging infrastructure, and…
Serves UK businesses and public sector organisations, targeting sustainability teams, energy consultants, facilities managers and operations managers in manufacturing, logistics, education,…
Financial Health
WeakWeak · Hiring · 41% CAGR over 2y
Location
ENER-G RENEWABLE SOLUTIONS LIMITED
Trajectory
2y · 2023–NowFinancial sub-scores
Computed from 2 filingsDesigns, installs and manages commercial solar photovoltaic systems, including rooftop, ground-mounted and carport installations. Provides EPC contracting, battery storage integration, operations and…
Serves UK commercial businesses, agricultural operators and landowners with sites suitable for rooftop, carport or ground-mounted solar projects.
Financial Health
StrongStrong · Growing · 0% CAGR over 2y
Location
The Low Carbon Energy Company Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns, supplies and installs solar photovoltaic systems, including rooftop and ground‑mounted panels, for commercial and other sectors. Also provides battery storage, LED lighting and infrared…
Serves UK businesses, agricultural sites, public-sector organisations and some domestic customers, with emphasis on commercial buyers in manufacturing, warehousing, hospitality, hospitals/medical…
Financial Health
StrongStrong · Growing, Hiring · 26% CAGR over 4y
Location
Boston Renewables Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDesigns and installs commercial renewable energy systems including roof- and ground-mounted solar PV arrays, solar carports, battery energy storage and electric vehicle charging infrastructure, and…
Serves businesses across the north of England, including commercial organisations in varied sectors seeking to reduce energy costs, cut carbon emissions, and manage on-site energy generation and EV…
Financial Health
HealthyHealthy · Hiring · 22% CAGR over 2y
Location
Watt Energy Saver Ltd
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDesigns, installs and maintains renewable energy and energy efficiency systems for commercial and public sector buildings, including solar PV, EV charging infrastructure, energy storage, and heat…
Serves B2B and public sector buyers across the UK, including construction, agricultural, commercial, industrial, education and healthcare organisations, plus warehouses, cold storage and leisure…
Financial Health
StrongStrong · Profitable, Hiring · 13% CAGR over 2y
Location
CENTRECO (UK) LIMITED
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsDesigns, installs and manages commercial solar photovoltaic energy systems. Provides consultation, system design, planning, installation, testing, commissioning and monitoring services enabling…
Serves UK businesses and public sector organisations with on-site energy needs, including distribution, farming and agriculture, industrial and manufacturing, food and drink, print and publishing,…
Financial Health
StrongStrong · Growing, Hiring · 20% CAGR over 3y
Location
Eden Energy And Construction Limited
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides construction and installation services for renewable energy projects, specialising in ground‑mounted solar farms. Carries out piling, mechanical and electrical installation, and supports…
Serves UK renewable energy developers, solar farm owners and EPC partners delivering ground-mounted solar projects, plus commercial organisations planning rooftop solar or other renewable energy…
Financial Health
StrongStrong · Growing, Hiring · 150% CAGR over 3y
Location
ENERGY GAIN UK LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDesigns and installs commercial solar photovoltaic systems, including rooftop, ground‑mounted and carport arrays. Provides energy profiling, system design, project management, commissioning,…
Serves UK businesses, developers and public sector organisations, particularly in construction, manufacturing, healthcare, agriculture, education and local government, seeking commercial-scale…
Financial Health
HealthyHealthy · Hiring · 20% CAGR over 2y
Location
CARBON3 LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns, supplies, installs and maintains renewable energy systems for commercial and public sector buildings, including solar PV, battery storage, electric vehicle charging and heat pumps, with…
Serves non-domestic organisations across the UK, including farms, schools, healthcare sites, public sector estates, social housing providers, manufacturers, logistics operators, retailers, developers…
Financial Health
StrongStrong · Growing, Hiring · 72% CAGR over 4y
Location
Ab Solar Consulting Ltd
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides construction, mechanical installation, and project management services for ground-mounted solar photovoltaic farms. Also offers consulting, operations support, and maintenance for…
Serves B2B customers in utility-scale solar, including solar farm developers, asset owners and project teams needing support for ground-mounted PV parks, operations and maintenance, and large…
Financial Health
StrongStrong · Growing, Hiring · 44% CAGR over 3y
Location
Solarsense (UK) Ltd
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDesigns, installs and maintains renewable energy systems including solar panels, battery storage, solar carports and EV charging infrastructure. Provides solar energy solutions for commercial and…
Serves commercial organisations across sectors, including UK brands, manufacturers and schools, as well as homeowners and new-build property customers seeking residential renewable energy systems.
Financial Health
StrongStrong · Growing, Hiring · 20% CAGR over 2y
Location
I-GEN ENERGY LIMITED
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsDesigns, supplies and installs commercial solar photovoltaic (PV) systems, including rooftop solar, solar carports and battery storage. Provides system design, performance modelling, installation,…
Serves commercial organisations and public-sector buyers, including construction developers and contractors, schools, food manufacturers, retailers, data centres and sporting venues seeking solar…
Financial Health
StrongStrong · Growing, Hiring · 8% CAGR over 3y
Location
EAST GREEN ENERGY LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns, supplies and installs renewable energy systems including solar PV, battery storage and solar farms for domestic, commercial and utility-scale projects. Provides electrical and mechanical…
Serves UK commercial property owners, agricultural businesses, homeowners and utility-scale energy projects, with additional contracting for commercial and domestic clients.
Financial Health
StrongStrong · Growing, Hiring · 7% CAGR over 4y
Location
CLEAN EARTH ENERGY INVESTMENTS LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops and installs commercial renewable energy systems including wind turbines and solar photovoltaic installations. Provides project development, private wire power purchase agreements,…
Serves UK businesses seeking on-site renewable energy, including commercial solar, wind and storage customers, plus organisations that own or operate renewable energy assets needing ongoing…
Financial Health
StrongStrong
Location
Power Different Limited
Trajectory
5y · 2022–NowFinancial sub-scores
Computed from 5 filingsDesigns and installs commercial solar photovoltaic (PV) systems, including rooftop and ground-mounted arrays and battery storage. Provides system integration, repairs, maintenance, and support for…
Serves businesses and commercial property operators seeking solar PV, battery storage, and maintenance for rooftops, ground-mounted sites, and other premises.
Financial Health
StrongStrong · Growing, Hiring · 30% CAGR over 4y
Location
ROC Energy Limited
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsDevelops and delivers renewable energy projects, specialising in large-scale solar parks and commercial solar PV systems. Provides development, design, planning, grid connections, financing,…
Serves UK landowners, landlords, commercial property owners, industrial sites, schools and investors involved in large-scale solar parks and commercial renewable energy projects.
Financial Health
StrongStrong · Hiring · 22% CAGR over 2y
Location
Solar4good UK Ltd
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsInstalls solar photovoltaic systems for residential and commercial properties. Services include design and installation of solar panels, battery storage systems, and EV chargers, supplying on-site…
Serves UK homeowners and commercial/public-sector property owners, including warehouses, schools, medical centres, farms, local councils, manufacturers, food businesses, care homes, hotels, logistics…
Financial Health
StableStable · 0% CAGR over 3y
Location
SOLAER UK LIMITED
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsDesigns, manufactures, installs and maintains solar photovoltaic and solar thermal energy systems for residential and commercial customers. Also provides battery energy storage, solar car park canopy…
Sells to homeowners, businesses, developers, and professional advisors across the UK seeking renewable energy systems, plus residential and commercial owners needing ongoing support for existing…
Financial Health
StableStable · 0% CAGR over 3y
Location
Aniron Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDesigns, installs and maintains industrial solar energy systems for commercial clients, including engineering, procurement and construction of solar PV installations, ongoing operations and…
Serves UK businesses and industrial or commercial site owners seeking to reduce energy costs, lower carbon emissions, and gain more control over on-site energy use.
Financial Health
StrongStrong · Growing, Hiring · 35% CAGR over 2y
Location
SUSTAINABLE BRIGHT LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides engineering, design, development, construction and maintenance services for utility‑scale renewable energy projects, particularly solar photovoltaic plants. Delivers turnkey solar farm…
Serves renewable energy developers, infrastructure owners and investors developing utility-scale solar PV farms and large renewables projects in the UK, Europe and internationally.
Financial Health
StrongStrong · Growing, Hiring · 4% CAGR over 4y
Location
SOLAR MAINTENANCE SERVICES LIMITED
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsInstalls, operates and maintains rooftop solar photovoltaic (PV) systems for domestic and commercial properties. Provides installation, inspection and ongoing maintenance services, managing solar…
Targets a mix of B2B, public sector and consumer customers: UK social landlords, councils, investors, commercial businesses and homeowners with rooftop solar PV systems.
Financial Health
StableStable · -4% CAGR over 2y
Location
SUNGIFT SOLAR LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns and installs solar photovoltaic (PV) systems for residential, commercial and community properties. Provides battery energy storage, EV charging points, solar carports and ground‑mounted…
Serves homeowners, businesses and community projects across the UK, including manufacturers, public sector bodies, wholesalers and distributors, universities, schools, office buildings, residential…
Financial Health
StrongStrong · Hiring · 22% CAGR over 4y
Location
NEWTON ENERGI LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsDesigns and installs commercial solar photovoltaic systems, battery energy storage solutions and solar carports. Provides engineering, procurement and construction (EPC) services and grid‑scale…
Serves homeowners, small businesses and larger energy users, including retailers, factories, logistics hubs, EV charging sites, data centres, hospitals, DNOs, transmission operators, renewable…
Financial Health
StrongStrong · Hiring · 26% CAGR over 4y
Location
WALLOP RENEWABLES LTD
Trajectory
4y · 2021–NowFinancial sub-scores
Computed from 4 filingsDesigns and installs solar photovoltaic systems for residential and commercial properties, including rooftop, ground-mounted and car park canopy installations. Also supplies battery storage systems…
Serves UK homeowners, businesses and landowners with commercial sites, car parks or ground space, plus property developers needing Part L solar packages.
Financial Health
StableStable · -31% CAGR over 3y
Location
Spirit Solar Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsDesigns, installs and maintains renewable energy systems including solar photovoltaic panels, battery storage and electric vehicle charging equipment for residential and commercial properties. Also…
Serves homeowners, business owners and public-sector/community organisations in the South of England, including agriculture, care homes, corporates, councils, data centres, facilities management,…
Financial Health
StrongStrong · Growing, Hiring · 11% CAGR over 5y
Location
SHAWTON LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDevelops and finances commercial solar energy projects for businesses, installing rooftop and ground-mounted photovoltaic systems and solar carports. Offers funded models such as power purchase…
Serves commercial and industrial businesses with high electricity use and available roof or ground space, including agriculture, chemicals, data centres, education, food and drink, manufacturing,…
Financial Health
HealthyHealthy · -58% CAGR over 2y
Location
GeoGreen Power Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides installation and maintenance of renewable energy systems including solar panels, battery storage, electric vehicle charging points, and air and ground source heat pumps for residential,…
Sells to both businesses and homeowners across the UK. Serves commercial buyers in sectors including education, manufacturing, agriculture, hospitality, healthcare, retail, property development and…
Financial Health
StrongStrong · Growing, Hiring · 16% CAGR over 4y
Location
George Green Power Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns and installs renewable energy systems for commercial and residential properties, including solar panel arrays, battery storage, electric vehicle charging points, and air and ground source…
Serves UK homeowners and businesses, including new-build developers, car dealerships, schools, factories, farms, manufacturers, hospitality venues, offices, public sector bodies, retailers, property…
Financial Health
StableStable · Hiring · 167% CAGR over 4y
Location
HDM WORLDWIDE LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns, finances and installs commercial solar panel systems under a no‑upfront‑cost model. Supplies electricity generated on-site to businesses through fixed‑price power agreements and sells…
Sells to businesses and commercial property landlords seeking lower-cost electricity and reduced carbon emissions without upfront capital expenditure.
Financial Health
HealthyHealthy · -40% CAGR over 4y
Location
ZLC ENERGY LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns and installs renewable energy systems for commercial and public sector sites, including solar PV, battery storage, heat pumps and small-scale wind. Provides feasibility, system design,…
Serves UK businesses and public-sector organisations, especially manufacturing and industrial sites, healthcare, education, agriculture, commercial property, and leisure and tourism operators.
Financial Health
StrongStrong · Growing, Hiring · 26% CAGR over 4y
Location
ROBINSON & LAWLOR LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns and installs renewable energy and electrical systems, including ground‑mounted and rooftop solar PV, battery storage, EV charging infrastructure, anaerobic digestion and hydro power…
Serves B2B clients including renewable energy developers, asset owners, and commercial or industrial organisations delivering solar, battery storage, anaerobic digestion, EV charging, hydro and…
Financial Health
HealthyHealthy · -67% CAGR over 4y
Location
HIGHADMIT PROJECTS LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides electrical and mechanical contracting services for commercial and public sector building projects, including system design, BIM coordination, installation and maintenance. Installs building…
Serves public- and private-sector organisations across the UK needing large, medium or small building projects, including education, police, transport, hospitality, student accommodation and…
Financial Health
StableStable · -4% CAGR over 4y
Location
HOWPOW LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides design and installation of solar photovoltaic systems and LED lighting for commercial and residential sites, including export limitation systems (G99/G100), panel building, energy…
Serves a mix of B2C homeowners and B2B commercial property owners or business owners seeking solar, LED lighting and energy-efficiency projects, including ongoing maintenance, inspections and support.
Financial Health
StrongStrong · Growing, Hiring · 16% CAGR over 4y
Location
SMART ENERGY HOMES LTD
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsInstalls renewable and energy‑efficiency systems for residential, commercial and housing association properties, including solar PV and battery storage, air source heat pumps, boilers, EV charging…
Serves homeowners, tenants, landlords, businesses and housing associations across Wales and England, including hospitality operators and affordable housing providers managing residential stock.
Financial Health
StrongStrong · Profitable
Location
DES RENEWABLE ENERGY LIMITED
Trajectory
2y · 2023–NowFinancial sub-scores
Computed from 2 filingsInstalls and maintains solar photovoltaic systems for residential and commercial properties. Provides battery storage installation, EV charger installation, solar PV maintenance, operations and…
Serves homeowners and commercial organisations in Bournemouth, Poole and Dorset, including new-build and renovation projects, car dealerships, schools, factories, warehouses and farms.
Financial Health
HealthyHealthy · Hiring · 17% CAGR over 1y
Location
Pure Renewables Commercial Ltd
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsDesigns, installs and services renewable energy and heating systems, including solar PV panels, heat pumps, battery storage, underfloor heating, heat recovery systems and EV chargers, for…
Serves B2C homeowners and residential property owners, alongside B2B customers from small commercial premises to large industrial operators with existing and new-build sites.
Financial Health
HealthyHealthy · Hiring · 100% CAGR over 3y
Location
The Little Green Energy Company Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDesigns and installs residential and commercial solar PV systems, battery storage, and EV charging equipment. Provides system design, installation, monitoring, maintenance, and inspection services,…
Serves homeowners and commercial organisations in Kent, Surrey, Sussex and London that want solar, battery storage or EV charging solutions for residential and business properties.
Financial Health
StableStable · 4% CAGR over 2y
Location
TN PRIME LTD
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsSupplies and installs solar energy systems for residential and commercial properties, including solar panels, inverters, battery storage and EV charging units. Provides system design, equipment…
Serves B2C and B2B customers: homeowners, domestic property owners, and commercial sites such as factories and offices across the UK.
Financial Health
StrongStrong · Growing, Hiring · 81% CAGR over 4y
Location
ECO2 SOLAR LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsSupplies and installs solar photovoltaic systems for residential developments, working with housebuilders to equip new-build homes with solar energy technology. Also provides homeowners with support,…
Serves residential property developers building new homes across the UK, with support also directed at homeowners who have questions about their solar panels, warranties or maintenance.
Financial Health
StableStable · -62% CAGR over 4y
Location
Square 4 Services Limited
Trajectory
5y · 2022–NowFinancial sub-scores
Computed from 5 filingsDesigns and delivers solar photovoltaic (PV) energy systems for commercial buildings. Provides project development, installation, and retrofit of renewable energy solutions for sectors including…
Serves commercial-sector organisations seeking renewable energy projects, especially large-scale clients in manufacturing, warehousing, retail and education building sectors.
Financial Health
HealthyHealthy · Hiring · 18% CAGR over 4y
Location
SPECTRA SOLAR LTD
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsSupplies and installs solar photovoltaic (PV) systems for residential and commercial properties, including panels, hybrid inverters and battery storage. Provides system design, site surveys,…
Serves UK homeowners and commercial property owners seeking solar PV and battery storage systems, with packages tailored to property type, roof space and budget.
Financial Health
HealthyHealthy · -7% CAGR over 2y
Location
GB-SOL LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsManufactures solar photovoltaic panels and roof‑integrated solar systems including solar slates and full‑roof PV coverings. Provides mounting systems, battery storage integration, and installation…
Serves homeowners, architects, developers, commercial building owners, industrial operators, social housing providers and marine customers across Great Britain.
Financial Health
HealthyHealthy · -1% CAGR over 4y
Location
KEMBLA LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns and installs solar panel systems and renewable energy solutions for residential, commercial, school and social housing properties. Also provides EV charging installations, system maintenance,…
Serves UK homeowners, businesses, schools, social housing providers and organisations with vehicle charging needs, covering both domestic and commercial buyers seeking renewable energy upgrades.
Financial Health
StableStable · -57% CAGR over 4y
Location
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How UK PV installation companies work and how to sell to them
What they do
PV installers earn revenue from project work: survey, system design, equipment supply, installation, commissioning and aftercare. Domestic jobs are usually fixed-price quotes with deposits, staged payments and warranty support, while commercial and public-site work is more often tendered against a specification and billed by milestones. Margins tend to sit across labour utilisation, electrical design competence, procurement of panels and mounting equipment, and the ability to avoid rework on roofs or ground-mounted sites. Recurring revenue is usually secondary, coming through maintenance, monitoring, fault response and performance checks rather than pure subscription pricing.
Who they sell to
Customers range from owner-occupiers and landlords to commercial property owners, industrial sites, construction contractors and public-sector estates teams. The decision-maker changes with the job: homeowners may buy directly, landlords and property managers focus on payback and tenant disruption, and larger sites typically involve facilities, energy procurement, finance, health and safety, and external electrical advisers. Domestic sales cycles are usually short and quote-led. Larger commercial and public-sector projects take longer, often moving through site surveys, grid-connection planning, tender documents, procurement portals and finance approval before a contractor is appointed.
What they buy
Most PV installation firms tend to spend on field operations before back-office software: electrical materials, mounting systems, access equipment, vehicles, tools, testing kit, safety training, insurance and subcontract labour. As they grow, common software needs include CRM, quoting, survey capture, design workflow, job scheduling, stock control, document management, project accounting, fleet management and customer support. Firms doing larger-site work also buy legal support for contracts, health and safety consultancy, bid-writing help, recruitment for electricians and project managers, and finance tools that help manage deposits, supplier payments and milestone billing.
Why and how to sell to them
Commercial intent usually shows when installers move beyond repeatable domestic work into multi-site, commercial or public-sector projects. That shift creates pressure around scheduling, documentation, site access, health and safety files, warranty tracking, cash tied up in equipment, and handover evidence. Hiring project managers, adding electrical teams, winning a framework, changing operations leadership or pushing past local-contractor scale are useful triggers for outbound. Sales angles tend to land better when they connect to fewer missed appointments, cleaner tender responses, faster commissioning, lower rework, tighter cash control or more reliable aftercare rather than generic growth claims.
How this list is built
Data sources
This list is built from UK Companies House filings, XBRL accounts data, and semantic analysis of each company's public website. Revenue and headcount figures come from the most recent filed accounts; where the company has not filed, values are estimated using a model trained on filed history and peer benchmarks and are labelled as estimates.
Classification
Rather than relying solely on SIC codes, Firmbase classifies each company semantically: the company's website is crawled, an AI model reads what the company actually sells, and the company is placed into the relevant industry and subsectors. SIC codes are used as one signal but not the only one. This means a company that registered under a generic SIC code but pivoted into (for example) fintech is correctly identified as fintech, not as its original SIC category.
Freshness
The underlying company data is refreshed from Companies House continuously; filings appear in the list within days of submission. The curated list ordering is regenerated when the underlying data moves meaningfully (company count changes by more than 5%, a new company enters the top-ranked segment, or the filed-revenue numbers for the top firms change). You can see the last-updated timestamp near the top of the page.
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