Renewable Energy Companies in Bristol: 75 Active Firms (2026)
Renewable energy companies in Bristol develop, finance, install and operate low-carbon power assets across the city region.
Buying centres in this Bristol cohort sit around project finance, engineering delivery, asset operation and grid-facing services. Sellers tend to face estates teams, local authorities, infrastructure owners and commercial energy managers, with renewable electricity and energy project services forming the main commercial frame. Typical engagements appear lower-mid-market in shape: technical scoping, compliance work, installation or operation contracts, and recurring service arrangements attached to generation assets. Sales cycles are likely to be procurement-led where public-sector or infrastructure buyers are involved, while private commercial customers tend to buy around energy cost and low-carbon power requirements.
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Bristol has 75 actively trading renewable-energy companies, making this a compact city-region cohort rather than a broad national pool. Together, they report 884 employees, so the employment footprint is visible but concentrated in a relatively small set of operating businesses. The commercial profile is mixed: 9 companies sit above £5M of turnover, while 5 have been incorporated since 2022. That balance points to a market with some established project and asset operators, alongside a limited intake of newer entrants.
Ofgem licensing is the main regulatory reference point for Bristol businesses that generate, move or supply energy in Great Britain. Once licensed, operators must meet standard and any special licence conditions attached to their activity. Legacy subsidy compliance still matters for accredited generation assets: the Renewables Obligation is closed to new generating capacity, but accredited stations remain subject to audit checks and generation reporting for Renewables Obligation Certificates. RenewableUK provides the sector’s trade-body channel around deployment and export activity.
The Bristol pipeline appears more delivery-led than software-like: project development, engineering services and asset operation tend to depend on procurement windows, grid access, planning conditions and customer capex cycles. Scale-up scarcity is likely to remain a feature where firms need balance-sheet capacity for projects rather than only repeatable service revenue. Consolidation may come through asset portfolios, maintenance coverage and specialist compliance capability, although local public-sector demand should keep room for smaller contractors. Regulatory exposure also tends to favour operators with internal compliance discipline over lightly staffed entrants.
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
75
Active firms
2026
9
Above £5M turnover
within the local cohort
5
Incorporated since 2022
local renewable-energy firms
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Key facts
About 12% of the trading cohort reports turnover above £5M (9 of 75 firms) — the rest sits below that revenue band.
6% of the cohort was incorporated since 2022 (5 firms), so a sizeable share is in its first few filing cycles.
Ofgem licensing applies to businesses generating, moving or supplying energy in Great Britain, with standard and any special licence conditions after grant.
The Renewables Obligation is closed to all new generating capacity, but accredited stations still face audit, compliance checks and generation-data submissions for certificates.
UK renewables generated 50.8% of UK electricity in 2024, up from 46.4% in 2023, with output of 144.7 TWh.
Wind accounted for 29.5% of UK electricity generation in 2024, split between 17.2% offshore wind and 12.3% onshore wind.
Annual renewable capacity additions are forecast to rise from 666 GW in 2024 to almost 935 GW in 2030, with solar PV and wind forecast to account for 95% of additions.
Top Bristol Renewable Energy companies
Develops, finances, constructs and operates utility‑scale solar energy and battery storage projects, generating renewable electricity and supplying power to utilities, businesses and energy markets…
Serves businesses, utilities, investors, governments, landowners and local communities globally that engage in utility-scale renewable energy, storage, power purchase or land partnership arrangements.
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Develops, finances, builds and operates utility‑scale renewable energy projects, including solar farms, wind and battery storage systems. Manages project design, grid connection, construction and…
Serves UK landowners and farmers, corporates seeking renewable power purchase agreements, investors, local authorities and communities involved in utility-scale renewable energy projects.
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Develops, builds and operates renewable energy projects including utility-scale solar farms, wind installations and battery storage. Acts as an independent power producer, managing project design,…
Serves businesses, investors, landowners and farmers, plus local communities and local authorities in the UK. Targets corporate energy buyers through PPAs and organisations involved in utility-scale…
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Develops, finances, constructs and operates utility‑scale renewable energy projects, including solar farms, wind installations and battery storage. Works with landowners, businesses and utilities and…
Serves UK landowners and farmers, corporate energy buyers, investors, local authorities and communities involved in utility-scale renewable energy projects, with electricity ultimately supplying…
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Develops, constructs, and operates utility‑scale renewable energy projects, primarily solar parks and battery storage systems. Activities include project design, engineering, construction, grid…
Serves UK businesses and corporate energy buyers, alongside landowners and farmers, investors, local communities and local authorities involved in utility-scale renewable energy projects.
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Develops, constructs and operates utility‑scale onshore renewable energy and energy storage projects, including solar and wind installations. Works with utilities, investors and businesses to deliver…
Serves investors, businesses, utilities, governments, landowners and local communities seeking utility-scale renewable energy and storage projects, power offtake, partnerships or land agreements…
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Develops, builds and operates renewable energy projects, primarily utility-scale solar parks and battery storage. Activities include site development with landowners, engineering and construction,…
Serves UK landowners and farmers, corporate energy buyers, investors, local communities and local authorities involved in utility-scale renewable energy projects and power purchasing.
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Develops renewable energy projects including onshore wind farms, solar PV plants, hydro schemes and energy storage facilities. Undertakes site development and planning for utility‑scale generation…
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Computed from 5 filingsProvides engineering consultancy for offshore wind projects, specialising in foundation engineering. Services include early-stage concept and FEED studies, detailed foundation design, owner’s…
Serves B2B customers in the offshore wind sector, especially fixed and floating wind developers, project owners and engineering teams needing support across wind farm development lifecycles worldwide.
Financial Health
StrongStrong · Growing, Hiring · 22% CAGR over 4y
Location
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Operates and maintains an electricity distribution network, delivering power from the transmission system to homes and businesses. Manages substations, overhead lines and underground cables, provides…
Serves households, businesses, property developers, energy generators, landowners and public bodies in its licensed electricity distribution area, plus infrastructure partners needing network access.
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Computed from 3 filingsDesigns, installs, and maintains renewable energy systems for commercial properties, including solar PV, battery storage, and heat pumps. Provides project management from system design and…
Serves commercial and public-sector organisations with site-specific renewable energy needs, including sports complexes, fire stations and other facilities requiring compliant design, installation…
Financial Health
StrongStrong · Growing, Hiring · 15% CAGR over 2y
Location
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Develops, constructs and operates utility‑scale onshore renewable energy and energy storage projects, including solar and wind farms. Works with utilities, businesses, governments and investors to…
Serves utilities, large businesses, public sector bodies, investors, landowners and local communities seeking utility-scale renewable energy and storage partnerships across global markets.
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Computed from 5 filingsProvides electrical and mechanical engineering services including system design, project management, installation and maintenance. Delivers HV and LV electrical systems, switchgear, SCADA and…
Serves commercial and industrial organisations across the UK, including facilities management companies and operators in nuclear, energy, water and utilities, food and beverage, renewables,…
Financial Health
HealthyHealthy · -16% CAGR over 4y
Location
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Computed from 5 filingsDesigns and installs renewable energy systems for homes and businesses, including solar photovoltaic panels, battery storage, heat pumps, EV charging points, and solar carports. Provides system…
Serves homeowners, landlords and commercial property owners in Bristol and the South West, including workplaces needing renewable energy, battery storage, heat pump and EV charging installations.
Financial Health
StableStable · Hiring · 26% CAGR over 4y
Location
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Operates renewable energy generation assets including commercial-scale solar, wind, biomass, and landfill gas. Also invests in and owns retirement living and healthcare properties, provides financing…
Serves UK businesses and operators in renewable energy, healthcare, retirement living, fibre broadband, and property development, including firms building care homes, energy sites, and residential or…
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Computed from 3 filingsDevelops large-scale renewable energy projects, including onshore and offshore wind, solar photovoltaic, and ocean energy such as wave and tidal. Also works on energy storage and hydrogen-based…
Serves B2B and public-sector energy buyers, including utilities, grid operators, large energy users, governments and Crown Estate-style leasing bodies involved in large-scale renewable energy and…
Financial Health
WeakWeak · -9% CAGR over 2y
Location
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Computed from 5 filingsDesigns, develops and operates community energy microgrids for residential developments. Works with housebuilders, housing providers and investors to deploy local renewable generation and smart grid…
Serves homeowners and occupiers, housebuilders, developers, housing associations, community land trusts, cohousing communities, neighbourhood partnerships and impact investors involved in community…
Financial Health
HealthyHealthy · Hiring · 15% CAGR over 4y
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Develops and invests in offshore wind energy projects, including floating and bottom-fixed installations. Works with local partners to originate, design and advance projects from early-stage…
Targets energy-sector partners, local offshore wind developers, utilities, investors and public bodies involved in large-scale renewable energy projects, especially in the UK, Spain, Italy and…
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Develops and invests in offshore wind energy projects, including floating and bottom‑fixed installations. Partners with local developers to originate, design and advance projects from early-stage…
Serves B2B energy-sector partners, particularly local offshore wind developers and strategic project partners, while engaging public leasing authorities, government stakeholders and local communities…
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Operates and maintains electricity distribution networks delivering power to homes and businesses. Provides network connections, infrastructure upgrades, asset maintenance, engineering and testing…
Serves electricity network users and stakeholders in the UK, including homes and businesses affected by power cuts, energy developers and generators seeking grid connections, and landowners,…
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Develops, owns and operates renewable energy and energy storage infrastructure assets, including wind, solar and battery projects, and manages investments in electricity generation facilities that…
Targets institutional and retail investors, shareholders, and investment advisers interested in renewable energy infrastructure assets and public-market investment information.
Financial Health
N/AN/A
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Computed from 3 filingsDesigns and manufactures proton exchange membrane (PEM) hydrogen electrolysers and modular electrolyser systems that produce green hydrogen from water and electricity. Provides scalable units for…
Sells to businesses and project developers deploying green hydrogen systems, including industrial users with high-demand hydrogen applications and organisations building multi-megawatt, off-grid or…
Financial Health
DistressedDistressed · 83% CAGR over 1y
Location
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Computed from 2 filingsOwns and operates battery energy storage infrastructure used to store electricity from the power grid and renewable generation, providing grid balancing and energy storage services as part of a…
Serves investors seeking listed exposure to renewable energy infrastructure, including retail shareholders and institutional investors interested in long-term income and energy transition assets…
Financial Health
StableStable
Location
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Computed from 5 filingsProvides engineering and project management consultancy for renewable energy and sustainable development projects. Services include pre‑construction planning, construction management, operations and…
Sells to renewable energy project developers, asset owners and investors needing engineering, project management and maintenance support for wind, storage and wider sustainable energy schemes, from…
Financial Health
StrongStrong · Hiring · 76% CAGR over 4y
Location
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Invests in and operates renewable energy assets including commercial-scale solar, wind, biomass and landfill gas. Also finances development of care homes, energy and property projects, and owns…
Serves UK businesses in energy, healthcare and property, including developers of care homes, energy sites, and residential or commercial properties.
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Computed from 4 filingsProvides commercial and industrial electrical contracting services including planned and reactive maintenance, electrical installations, inspection and testing, and renewable energy systems such as…
Serves B2B and public-sector premises across South West England and South Wales, including commercial property operators, schools, data centres and industrial facilities.
Financial Health
HealthyHealthy · Hiring · 46% CAGR over 3y
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Computed from 5 filingsDesigns and supplies off‑grid and grid‑backed hybrid power systems combining solar, batteries and generators. Provides central battery systems for emergency lighting, UPS equipment, inverters,…
Serves UK homeowners, businesses and public-sector organisations needing off-grid, hybrid or backup power, including commercial, manufacturing, retail, agriculture, entertainment, GLAM, aviation,…
Financial Health
StableStable
Location
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Invests in and develops power generation and energy infrastructure projects, including solar, wind, hydro, natural gas and energy storage. Supports electricity production, grid infrastructure and…
Serves B2B energy customers including technology and data centers, mining and metals companies, commercial and industrial businesses, utilities and cooperatives, plus project landowners and community…
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Invests in and operates infrastructure businesses including renewable energy generation such as solar, wind, biomass and landfill gas. Also provides financing for property and energy projects and…
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Computed from 5 filingsDevelops electro‑methanogenic wastewater treatment and waste‑to‑energy technology. Designs and installs modular biogas systems that convert industrial wastewater and by‑products into methane and…
Serves B2B customers with organic waste streams, including anaerobic digestion operators, breweries, distilleries, dairy and agricultural producers, and food and beverage manufacturers.
Financial Health
StrongStrong · Hiring · 15% CAGR over 4y
Location
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Computed from 2 filingsOperates and owns wind power generation projects. Develops and manages wind farms and associated turbines, producing electricity from wind energy and overseeing the operation and asset management of…
Financial Health
WeakWeak
Location
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Computed from 2 filingsDevelops, constructs and operates renewable energy infrastructure and battery energy storage assets as part of an investment portfolio. Generates and supplies electricity from assets such as wind and…
Serves retail and institutional investors seeking listed exposure to renewable energy infrastructure assets, with shareholder information for investors in UK-listed investment companies.
Financial Health
StableStable
Location
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Computed from 5 filingsProvides wind and solar power generation forecasting services for energy suppliers, system operators and traders. Uses modelling to produce intraday to day‑ahead and longer‑term forecasts and…
Serves B2B customers in European energy markets, including large energy suppliers, system operators, power and gas traders, and market data platforms.
Financial Health
DistressedDistressed
Location
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Computed from 5 filingsProvides electrical engineering consultancy for power systems, including power system analysis, electrical network design, grid connection studies, earthing and lightning protection design,…
Serves B2B customers across the power sector, including large industrial and manufacturing companies, EPC contractors, network operators and energy developers, with international projects.
Financial Health
StrongStrong · Growing, Hiring · 32% CAGR over 4y
Location
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Computed from 2 filingsDevelops and operates a utility-scale solar photovoltaic farm project, managing planning, construction and operation of solar power infrastructure and related community engagement for the Brick House…
Financial Health
WeakWeak
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Computed from 5 filingsProvides technical and commercial consultancy for renewable energy, energy storage, hydrogen and energy flexibility projects. Services include strategy, due diligence, project development support,…
Serves B2B clients in the energy sector, including renewable energy, storage, hydrogen and flexibility companies, project developers, asset owners and investors. Targets major sector brands and…
Financial Health
StrongStrong · Profitable, Growing, Hiring · 44% CAGR over 4y
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Computed from 5 filingsDesigns and builds district heating and cooling systems, including energy centres, distribution networks and energy substations. Provides engineering, installation and commissioning services for…
Serves UK clients commissioning district heating and cooling networks, including local authorities, commercial and residential developers, institutions, data centres and waste plants.
Financial Health
StrongStrong · Growing, Hiring · 63% CAGR over 4y
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Develops, owns and operates renewable energy and energy storage infrastructure as part of an investment portfolio. Assets generate electricity and provide grid services, with projects managed to…
Serves retail and institutional investors seeking exposure to listed renewable energy infrastructure, with materials aimed at shareholders and prospective investors in permitted jurisdictions.
Financial Health
N/AN/A
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Computed from 2 filingsInvests in, develops, constructs and operates renewable energy and energy storage infrastructure, including wind and solar assets, generating electricity and managing a diversified portfolio of power…
Serves investors seeking exposure to listed renewable energy infrastructure, including institutional investors, wealth managers and private shareholders interested in long-term income and energy…
Financial Health
StableStable
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Computed from 5 filingsOperates an online marketplace for power purchase agreements (PPAs) connecting renewable energy generators with electricity buyers. Provides PPA price forecasting, tendering tools, market data, green…
Serves UK renewable energy generators, including asset owners and managers, farmers and landowners with single turbines, portfolio operators, and developers of new projects, plus energy offtakers…
Financial Health
HealthyHealthy
Location
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Designs and supplies industrial energy efficiency and heat recovery technologies for boiler plants and steam systems, including steam traps, flue gas heat recovery units, cogeneration systems and…
Serves industrial and institutional organisations with boiler plant and steam operations, including food and beverage, pulp and paper, hospitals, pharmaceuticals, chemicals and petrochemicals, and…
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Computed from 2 filingsProvides building services including design, installation and maintenance of electrical, mechanical and renewable energy systems. Carries out electrical installations and electric vehicle charging…
Serves B2B, public sector and domestic customers, including national housebuilders, main contractors, health trusts, universities, industrial and commercial sites, and homeowners needing building…
Financial Health
StrongStrong
Location
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Computed from 5 filingsFinancial Health
DistressedDistressed
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Computed from 5 filingsProvides consultancy on energy systems and property decarbonisation, advising organisations on local energy asset development, energy cost management, and design of low‑carbon energy portfolios and…
Serves organisations managing property portfolios, local energy assets and city-scale energy programmes, including universities, property developers, foundations and local/public-sector stakeholders…
Financial Health
StableStable · Hiring · 19% CAGR over 4y
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Invests in, develops, constructs, and operates renewable energy infrastructure, including wind and solar power assets. Manages a diversified portfolio of projects that generate and sell renewable…
Serves investors seeking listed renewable energy infrastructure exposure, including retail shareholders and institutional investors interested in long-term income and energy transition assets across…
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N/AN/A
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Computed from 5 filingsProvides mechanical and electrical building services including design, installation and commissioning of heating, chilled water, plumbing, ventilation, air conditioning, electrical and renewable…
Sells to businesses in the construction and building sectors, especially main contractors and project teams delivering commercial, leisure, care and medical developments requiring MEP services.
Financial Health
WeakWeak
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Computed from 5 filingsDevelops downhole drilling technologies including the NexTitan autonomous control, anchoring and drive system designed to improve deep drilling in hard rock. Solutions target geothermal, oil and gas,…
Serves B2B energy-sector customers, including geothermal developers, oil and gas operators, offshore well construction partners, and large energy consumers evaluating deep geothermal.
Financial Health
HealthyHealthy · Hiring · 5% CAGR over 4y
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Provides energy-efficiency upgrades for residential and commercial buildings, including cavity, loft, wall and underfloor insulation installation, cavity wall extraction, air source heat pumps and…
Serves a mix of homeowners, landlords and commercial project clients seeking energy-efficiency improvements, including property owners concerned with insulation, EPC ratings, comfort and energy costs.
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N/AN/A
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Develops and deploys on-site fuel cell power systems that generate electricity for AI data centres. Provides modular, scalable power generation designed to deliver reliable energy supply independent…
Serves B2B customers building or operating AI datacenters, particularly infrastructure teams and developers needing scalable on-site power for large-scale computing facilities.
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Computed from 5 filingsFinancial Health
StableStable
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How Bristol Renewable Energy companies work and how to sell to them
What they do
Revenue usually comes from a mix of development fees, engineering and installation work, operation and maintenance retainers, asset management charges, consultancy, and energy-related contract income. Some firms earn against physical generation assets, while others sell project services around feasibility, grid connection, metering, compliance, monitoring and ongoing performance. Pricing tends to follow the shape of the asset or contract: fixed-fee scoping, milestone-based delivery, recurring maintenance, or margin on long-running energy agreements. Working capital matters because customer payments, equipment purchases, planning steps and grid milestones rarely line up neatly.
Who they sell to
Buyers are typically commercial estates teams, local authorities, public-sector bodies, infrastructure owners and energy managers rather than individual consumers. Finance directors and procurement teams often sit close to the decision because projects carry capex, compliance and operating-cost implications. Technical approval may come from engineering, sustainability, facilities or asset-management leads. Public-sector work tends to move through tenders, frameworks or formal RFPs; private estates work is more often direct sales with a technical proposal, site visit and cost model. Sales cycles usually lengthen when grid access, planning or board approval is needed.
What they buy
Most Bristol renewable-energy firms tend to spend on project accounting, field-service management, asset monitoring, document control, CRM, contract management, billing, cyber security, health-and-safety systems, and reporting tools for compliance or customer assurance. Engineering-led firms also need design support, surveying, planning advice, grid-connection consultancy, insurance, specialist recruitment and subcontractor capacity. Asset operators may buy monitoring equipment, data services, maintenance scheduling, spare-parts management and finance systems that can handle project-level profitability. Sellers with services attached to audit trails, uptime, margin control or bid preparation usually have a clearer route into this market than generic productivity pitches.
Why and how to sell to them
Commercial pressure often comes from delayed grid connections, planning conditions, equipment lead times, tender deadlines, compliance checks and the need to keep assets producing as forecast. Buying triggers include a new project award, entry onto a public-sector framework, a funding event, a move from installation into maintenance, or the appointment of senior finance, operations or engineering staff. Outbound messages tend to land better when they attach to a specific operational risk: reducing bid effort, evidencing Ofgem-related compliance, shortening field-service response times, improving project cashflow visibility, or protecting margin across subcontracted delivery.
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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