Solar Installation Companies in Glasgow: 37 Active Firms (2026)
Solar installation companies design, fit and maintain photovoltaic power systems for homes, landlords and businesses across Glasgow.
Buying centres usually sit with property owners, facilities managers, housing and landlord teams, and public-sector estates functions rather than a centralised energy buyer. Work is project-led, moving from survey and system design into supply, electrical installation, commissioning and maintenance. The practical distinction is between contractors that deliver site work themselves and businesses that mainly resell equipment or advise on specifications. Engagements range from household retrofits to commercial and public-sector estate programmes, so credible suppliers need field teams, electrical engineering judgement, project management and a service model that can handle aftercare once panels are on the roof.
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Glasgow has 37 actively trading solar installation companies in this list, which makes it a relatively concentrated contractor market rather than a broad national supply pool. Reported headcount totals 611 people, giving the local cohort a visible employment footprint across SMEs and regional contractors. The practical market is therefore likely to be relationship-led: customers need nearby surveyors, electrical teams and maintenance coverage, not just a remote equipment supplier.
Site delivery puts these firms closer to electrical contracting and construction services than to pure energy retail. Installation standards, customer documentation, warranties and maintenance responsibilities sit inside the sales process, because a poorly scoped roof, meter position or site access plan can turn a straightforward purchase into a delayed project. Public-sector work adds procurement evidence and service commitments; commercial customers tend to focus on disruption, payback narrative and ongoing accountability.
The cohort appears to favour contractors with practical installation capability over asset-light advisers, which should keep delivery capacity and retention of qualified electricians near the centre of competition. Scale-up scarcity also tends to matter in local retrofit markets: when larger estates want accountable delivery across dispersed sites, they may prefer contractors able to combine survey, project management and aftercare. Smaller installers are likely to remain exposed to seasonal demand and procurement delays, so consolidation and subcontracting may shape the market more than uniform expansion.
What’s in the file
One row per company, 50+ columns — everything below plus each company’s verified directors, from Companies House filings.
Company data
Verified directors — included
37
Active firms
2026
10
Above £5M
reported revenue
4
Since 2022
recent incorporations
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Key facts
About 27% of the trading cohort reports turnover above £5M (10 of 37 firms) — the rest sits below that revenue band.
10% of the cohort was incorporated since 2022 (4 firms), so a sizeable share is in its first few filing cycles.
Solar installers sit at the delivery end of the photovoltaic market, turning equipment supply into installed capacity for homes, landlords and businesses.
Work typically spans site surveys, system design, panel fitting and maintenance rather than hardware sales alone.
Roof access, electrical work, aftercare and customer handover are central operating requirements for this segment.
Routes to market tend to differ between domestic customers, landlords and commercial buyers, so customer type is a useful screening signal.
Top Glasgow Solar Installation companies
Financial sub-scores
Computed from 3 filingsProvides design and installation of solar panel systems and battery storage for residential and commercial properties, including rooftop and ground‑mounted solar installations to generate electricity…
Sells to homeowners and businesses across Scotland’s Central Belt, with case studies spanning private households, schools and commercial firms.
Financial Health
WeakWeak · -11% CAGR over 2y
Location
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Computed from 2 filingsSupplies and installs solar photovoltaic systems and battery storage for residential, commercial and industrial properties. Also installs ground‑mounted solar arrays, solar farms and air source heat…
Serves homeowners in Scotland and commercial, industrial and energy-farm clients across Scotland and the UK, including businesses with premises or land for solar projects.
Financial Health
StrongStrong · Hiring · 398% CAGR over 1y
Location
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Computed from 5 filingsInstalls electric vehicle charge points for homes and workplaces, and designs and installs solar photovoltaic systems and battery storage. Also provides inspection, servicing and maintenance for…
Serves homeowners and businesses in Scotland seeking EV charging, solar PV, battery storage, and related maintenance, from domestic properties to workplaces and commercial sites.
Financial Health
HealthyHealthy · Hiring · 6% CAGR over 4y
Location
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Computed from 4 filingsDesigns and installs solar photovoltaic (PV) systems for residential and commercial properties, including rooftop and ground‑mounted arrays. Also supplies battery storage systems, EV chargers, and…
Serves homeowners and families across Scotland, plus commercial organisations seeking renewable energy upgrades, including visitor attractions and other businesses managing operational energy costs.
Financial Health
WeakWeak · -74% CAGR over 3y
Location
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Computed from 5 filingsProvides renewable energy and electrical installation services for residential and commercial properties, including solar PV panels, air source heat pumps, battery storage systems, EV chargers, gas…
Serves homeowners, landlords, businesses and social housing providers in Central Scotland needing renewable energy, heating and electrical contractors for domestic, commercial and large-scale…
Financial Health
WeakWeak · -61% CAGR over 5y
Location
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Computed from 3 filingsInstalls renewable energy and electrical systems for residential and commercial properties, including solar PV panels, battery storage, air source heat pumps, EV chargers and associated electrical…
Serves homeowners and businesses across Scotland and the UK, including domestic customers, commercial property owners and organisations involved in ECO4 projects seeking renewable energy and…
Financial Health
StableStable
Location
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Computed from 5 filingsProvides electrical contracting services for residential, commercial and industrial properties, including electrical rewires, maintenance, EICR inspections, PAT testing, EV charging point…
Serves homeowners, landlords, letting agents, commercial and industrial clients, and insurance-related customers across Glasgow and Central Scotland.
Financial Health
HealthyHealthy · Hiring · 29% CAGR over 4y
Location
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Computed from 3 filingsProvides design, installation and maintenance of heating and plumbing systems for commercial and residential properties. Services include gas boiler installation, ventilation and air conditioning…
Serves commercial and domestic clients, including social and private housing providers, across Scotland’s central belt and other stated areas from the Borders and Aberdeen to Newcastle.
Financial Health
StableStable
Location
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Computed from 5 filingsProvides solar panel installation, maintenance and repair services, including bird proofing systems to prevent nesting under panels. Also installs solar batteries, inverters, meters, isolators and…
Serves homeowners and commercial property owners across Scotland with existing or planned solar panel systems, including customers needing bird-proofing, maintenance, repairs, battery storage or EV…
Financial Health
StrongStrong · Growing, Hiring · 19% CAGR over 4y
Location
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Computed from 5 filingsProvides energy management services and designs and installs solar photovoltaic systems and ventilation solutions for residential and commercial buildings, supporting energy efficiency improvements…
Financial Health
StrongStrong · Growing, Hiring · 8% CAGR over 4y
Location
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Computed from 4 filingsDesigns, supplies and installs mechanical, electrical and plumbing systems for commercial, retail and industrial buildings. Provides renewable energy installations such as biomass, CHP and solar PV,…
Serves business clients in the commercial, retail and industrial sectors across the UK, particularly organisations commissioning large-scale M&E projects and related site works.
Financial Health
StableStable · -8% CAGR over 3y
Location
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Computed from 4 filingsProvides electrical and mechanical installation services including solar PV and EV charging systems. Installs and maintains fire and security systems, UPS and generator equipment, and conducts…
Serves B2B property and facilities management clients, building owners and organisations with managed premises across Great Britain and Northern Ireland, including buyers responsible for building…
Financial Health
StableStable · 2% CAGR over 3y
Location
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Computed from 5 filingsProvides energy‑efficiency retrofit services including loft, cavity, solid wall and underfloor insulation, solar PV and battery storage, air source heat pumps, and heating systems for homeowners,…
Serves UK homeowners and tenants, private customers seeking funded upgrades, businesses with commercial properties, and social housing providers/RSLs managing retrofit and refurbishment programmes.
Financial Health
HealthyHealthy · -57% CAGR over 4y
Location
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Computed from 5 filingsSupplies and installs residential home improvement products including double‑glazed windows, external doors, conservatories, orangeries and garden rooms. Also provides renewable energy systems such…
Serves homeowners across Scotland, including Glasgow, Edinburgh, Aberdeen, Dundee and Stirling, seeking residential windows, doors, living spaces and renewable home upgrades.
Financial Health
HealthyHealthy · Hiring · 3% CAGR over 5y
Location
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Computed from 5 filingsInvestment holding company overseeing a group that delivers energy‑efficiency retrofit works for residential properties under the ECO scheme, including loft, cavity, solid wall and underfloor…
Serves individual homeowners eligible under Ofgem ECO, plus commercial property clients and registered social landlords managing housing stock.
Financial Health
StableStable · -68% CAGR over 4y
Location
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Computed from 4 filingsDesigns and installs renewable energy systems including air source heat pumps, solar PV panels and battery storage for residential and commercial properties. Also provides heat pump servicing,…
Serves homeowners and commercial property owners across Scotland, especially around Glasgow and Dumbarton, seeking renewable energy upgrades and funding guidance for residential and business premises.
Financial Health
StableStable · 3% CAGR over 3y
Location
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Computed from 2 filingsDesigns and installs renewable energy systems for commercial clients, including solar photovoltaic installations and air source heat pumps. Provides feasibility assessments, project planning,…
Serves businesses across Scotland and the UK, including commercial property owners and organisations developing rooftop or utility-scale energy projects, seeking to reduce costs and meet…
Financial Health
StrongStrong · Hiring · 67% CAGR over 1y
Location
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Computed from 4 filingsProvides electrical engineering and building services for commercial and infrastructure projects, including MEP design, electrical installations, fire and security systems, and renewable energy…
Serves commercial and industrial businesses, utility companies, contractors and public-sector organisations needing building services and energy-related project support across Scotland and the UK.
Financial Health
HealthyHealthy · 0% CAGR over 3y
Location
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Computed from 3 filingsInstalls and services solar photovoltaic energy systems for residential and commercial properties. Provides solar panels, inverters and battery storage systems, along with system repairs, maintenance…
Serves UK homeowners and commercial businesses, including property owners with existing solar PV systems and new buyers considering renewable energy upgrades.
Financial Health
WeakWeak · Hiring · 26% CAGR over 2y
Location
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Installs solar photovoltaic systems, battery storage and related renewable energy equipment for homes and businesses, and advises on available government grants and energy‑saving programmes.
Serves homeowners and property owners across Scotland, including Glasgow, Edinburgh and Aberdeen, seeking solar energy upgrades and grant-supported installations.
Financial Health
N/AN/A
Location
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Computed from 5 filingsDesigns, installs and maintains solar photovoltaic systems for residential and commercial properties. Services include new solar installations, battery storage integration, system upgrades, and…
Sells to homeowners and business owners seeking solar installations, battery storage, or system upgrades, serving both domestic and commercial customers. Indicates installs across the UK.
Financial Health
StrongStrong · Hiring · 41% CAGR over 4y
Location
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Computed from 4 filingsProvides electrical contracting and building services including MEP engineering, fire and security systems, and energy solutions. Designs and installs solar PV, EV charging infrastructure, hydropower…
Serves commercial and industrial organisations, utility companies, contractors and public sector bodies across Scotland and the UK, typically buyers responsible for building, energy, infrastructure…
Financial Health
StrongStrong · Growing, Hiring · 34% CAGR over 3y
Location
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Computed from 3 filingsInstalls electric vehicle charging points for homes and commercial sites, including brands such as Tesla, Ohme and Wallbox. Also installs solar PV systems and provides electrical services and roofing…
Serves homeowners and commercial property owners across Scotland and Northern England, including EV drivers and organisations needing charging provision or solar energy for their premises.
Financial Health
StableStable · Hiring · 91% CAGR over 2y
Location
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Computed from 5 filingsInstalls and services solar photovoltaic systems for residential or commercial properties, including panel installation, repairs and upgrades. Also provides battery storage systems, off‑grid power…
Financial Health
StrongStrong · Growing, Hiring · 15% CAGR over 5y
Location
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Computed from 4 filingsProvides independent connection provider (ICP) services for electricity networks, including network analysis, design, installation, energisation and maintenance of grid connections. Also designs and…
Serves UK businesses, developers, utilities and industrial/commercial organisations, including renewable energy projects, EV fleet and hub operators, car park owners, residential developers, haulage…
Financial Health
StrongStrong · Growing, Hiring · 82% CAGR over 4y
Location
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Computed from 3 filingsInstalls and services renewable energy systems for homes, including air-source heat pumps, solar panel systems and battery storage. Provides system design, supply, installation and maintenance for…
Serves homeowners in Scotland seeking domestic renewable energy upgrades, including people replacing gas heating, adding solar generation, or installing battery storage, with support for household…
Financial Health
StrongStrong · Hiring · 22% CAGR over 2y
Location
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Computed from 3 filingsProvides electrical installation, maintenance and testing services for domestic, commercial and industrial sites, including power distribution, lighting, rewiring and infrastructure upgrades. Also…
Serves residential homeowners, commercial organisations and industrial operators across the UK, including offices, shops, schools, hospitals, retail units, factories, warehouses and utility-scale…
Financial Health
HealthyHealthy · Hiring · 63% CAGR over 2y
Location
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Computed from 5 filingsSupplies and installs renewable and energy‑efficient heating and cooling systems, including air source and ground source heat pumps, solar panels, heat recovery systems, underfloor heating and air…
Serves domestic homeowners and commercial clients, including property developers and project owners seeking planning permission, across Glasgow, Edinburgh, major Scottish cities and the Western Isles.
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StrongStrong · Growing, Hiring · 14% CAGR over 4y
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Computed from 5 filingsInstalls energy‑efficiency and renewable heating systems for residential properties, including cavity wall, loft and underfloor insulation, solar PV panels, air source heat pumps and boiler upgrades.…
Serves grant-eligible homeowners, private-paying property owners and some commercial property customers seeking energy-efficiency upgrades, renewables, boilers, insulation, roofing and roughcasting,…
Financial Health
HealthyHealthy · 0% CAGR over 4y
Location
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Computed from 5 filingsProvides plumbing, heating and air‑conditioning installation and maintenance services. Installs and services boilers, gas central heating, electrical systems, heat pumps, solar panels, battery…
Serves social housing providers and other public sector housing clients, plus private homeowners, landlords and social housing tenants. Targets residential property customers needing heating,…
Financial Health
HealthyHealthy · -5% CAGR over 4y
Location
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Computed from 5 filingsProvides insulation installation for residential and commercial buildings, including cavity wall, loft, internal and external wall, underfloor and acoustic insulation. Also installs solar PV, battery…
Serves homeowners, social landlords, community groups, commercial property owners, local councils, housing organisations and governing bodies across the UK.
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HealthyHealthy · Hiring · 9% CAGR over 4y
Location
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Computed from 3 filingsProvides plumbing and heating services for residential and commercial projects, including bathroom installations, system upgrades and maintenance. Installs renewable energy systems such as heat…
Sells to residential and commercial customers, including private homeowners, estates, self-builders, local businesses, charities and not-for-profits, plus national house builders, developers and…
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StableStable · Hiring · 8% CAGR over 2y
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Computed from 5 filingsProvides domestic heating and plumbing services including boiler installation, maintenance and repair, central heating installation and repairs, and installation of renewable energy systems such as…
Serves homeowners and residential property owners in Glasgow and surrounding areas needing plumbing, gas boiler, central heating, heat pump, solar panel, and insulation services.
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StrongStrong · Growing, Hiring · 32% CAGR over 4y
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Computed from 4 filingsProvides industrial and commercial roofing and cladding services, including installation, refurbishment and repair of roof systems, flat roofing, wall cladding, rooflights, guttering and safety…
Serves B2B and public-sector customers in Scotland, including factory and warehouse owners, commercial developers and contractors, local authorities, office and retail landlords, facilities managers,…
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StrongStrong · Growing, Hiring · 26% CAGR over 3y
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Computed from 5 filingsProvides domestic electrical and heating installation services, including gas central heating systems, electric storage heaters, rewiring, fuse box replacements, smoke alarm systems, EV charge…
Serves homeowners across Scotland, particularly residential customers seeking heating, electrical, energy-efficiency and renewable upgrades, including those using Home Energy Scotland funding.
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HealthyHealthy · -67% CAGR over 4y
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Computed from 2 filingsProvides assessment and installation of home energy‑efficiency measures under government-funded schemes, including insulation, heating system upgrades, air source heat pumps and solar PV. Assists…
Serves homeowners, private landlords and eligible tenants in Scotland, Wales and England, especially households on qualifying benefits or facing fuel poverty under ECO4 and ECO4 Flex criteria.
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StrongStrong · Growing, Hiring · 66% CAGR over 1y
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How Glasgow Solar Installation companies work and how to sell to them
What they do
Glasgow solar installation firms usually earn from fixed-price projects rather than subscriptions. Revenue is built from site survey, system design, equipment supply, installation labour, commissioning paperwork and aftercare, with deposits and staged payments common on larger jobs. Domestic work is often a single-property retrofit sold on payback, energy-bill reduction and installer availability. Commercial and public-sector projects are closer to construction packages, with pricing shaped by roof condition, access, electrical works, operating disruption and documentation. A smaller recurring revenue line can come from monitoring, maintenance and fault response once systems are live.
Who they sell to
Most sell to homeowners, landlords, housing teams, commercial property owners, facilities managers and public-sector estates staff across the Glasgow area. Domestic sales tend to move through direct enquiry, referral and local reputation, with the owner or landlord making the decision. Commercial work usually involves facilities, finance and procurement input, because payback claims, site access and business interruption all need approval. Public-sector and larger estate work is more likely to involve formal tendering, contractor evidence, insurance checks and service commitments. Sales cycles therefore range from short household decisions to slower multi-site procurement.
What they buy
Most solar installation contractors tend to spend on tools that reduce friction between enquiry, survey, quote, installation and aftercare. Useful categories include CRM, quoting, scheduling, job management, fleet tracking, document control, accounting, payroll, stock control and customer support software. Field teams also create demand for recruitment, training, health and safety advice, insurance, vehicles, access equipment, electrical materials and subcontractor management. Firms working on commercial or public-sector projects may also buy bid support, estimating help, photography or mapping services, and systems for storing commissioning packs, warranties and service records.
Why and how to sell to them
Solar installation buyers tend to evaluate suppliers when project volume starts to expose gaps in scheduling, cash collection, installation quality control or handover documentation. Moving from domestic work into commercial and public-sector jobs is a clear trigger, because tenders require evidence, audit trails and more disciplined project management. Passing £5M revenue can also signal a need for better finance, HR and operational controls; 10 Glasgow firms sit above that threshold. Outbound messages are likely to land better when they reference delayed surveys, electrician utilisation, warranty calls, procurement paperwork or lost margin on poorly scoped jobs.
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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Frequently asked questions
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