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Renewable Energy Companies in the UK: 3,756 Active Firms (2026)
Renewable energy companies in the UK develop, generate, supply and support low-carbon power under the Ofgem licensing framework.
Buying centres tend to sit in energy procurement, estates, infrastructure delivery, finance and sustainability teams, with utilities and public-sector bodies often acting as counterparties rather than simple end customers. The commercial shape is more project-led than most clean-tech software markets: grid connection, development rights, asset finance, engineering delivery, operations and maintenance, and power-purchase or supply arrangements all create longer sales cycles. Larger engagements usually involve site portfolios, generation assets or service contracts tied to uptime and compliance, while smaller specialists support feasibility, metering, asset optimisation or maintenance for business and infrastructure buyers.
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Across the UK, 3,756 renewable energy companies are actively trading, with the cohort split between asset developers, operators, suppliers, engineering contractors and service specialists. The scale band is uneven: 492 companies have turnover above £5M, while many others appear to remain at development, consultancy or small-asset stage. New company formation is still visible, with 478 incorporated since 2022, but the sector is not just a start-up story. Reported employment totals 10,744 people, suggesting a sizeable operating workforce around projects, assets and service delivery.
Companies that generate, move or supply energy in Great Britain sit within Ofgem’s licensing regime, with standard and special licence conditions shaping market entry and ongoing conduct. Compliance does not stop at market access. Accredited stations under the closed Renewables Obligation still face audit checks and generation-reporting duties for certificates, which keeps legacy support schemes relevant for operators and asset owners. RenewableUK adds a trade-body layer around deployment and export activity, but the practical regulatory burden remains activity-specific: a developer, licensed supplier, generator and maintenance contractor can face quite different obligations.
Further maturity appears likely to come through portfolio effects rather than a wave of stand-alone new suppliers. Grid connection, planning, compliance and asset-performance work tend to favour operators with access to patient capital, while specialist service firms can still find room around optimisation, maintenance and reporting. The early-commercial tail may persist, because project development often starts with small vehicles before assets reach operation. Consolidation also looks plausible where fragmented developers need balance-sheet support, though policy changes and connection queues can still slow conversion from pipeline to operating capacity.
3,756
Active firms
2026
492
Above £5M
turnover
478
Since 2022
new incorporations
Key facts
About 13% of the trading cohort reports turnover above £5M (492 of 3,756 firms) — the rest sits below that revenue band.
12% of the cohort was incorporated since 2022 (478 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 attached once granted.
The Renewables Obligation is closed to all new generating capacity, but accredited stations still submit generation data for Renewables Obligation Certificates and face audit checks.
Renewables generated 50.8% of UK electricity in 2024, up from 46.4% in 2023, with output reaching 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.
The IEA’s Renewables 2024 outlook says annual renewable capacity additions 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 UK Renewable Energy companies
RES GROUP HOLDINGS LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDevelops, constructs and operates renewable energy projects including wind, solar and energy storage systems. Provides asset management, operations and maintenance, construction management,…
Serves B2B and institutional customers in clean energy, including landowners, local communities, investors, asset owners, and project developers needing support across wind, solar, storage, hydro and…
Financial Health
HealthyHealthy · -1% CAGR over 2y
Location
THE FARM ENERGY COMPANY LIMITED
Trajectory
4y · 2023–NowFinancial sub-scores
Computed from 4 filingsDevelops, finances, owns and operates large-scale renewable energy projects, including wind turbines, solar farms and anaerobic digestion plants, supplying electricity and biomethane to commercial…
Serves large commercial and industrial energy users in the UK, alongside landowners involved in renewable project development and local community stakeholders.
Financial Health
StableStable · -78% CAGR over 3y
Location
CWE NORTHWIND LIMITED
Trajectory
2y · 2024–NowFinancial sub-scores
Computed from 2 filingsGenerates electricity using onshore wind turbines. Owns and operates a portfolio of over 200 turbines and provides operational management, maintenance, and asset management using proprietary software…
Serves wholesale electricity buyers and power offtake counterparties, with onshore wind generation assets located across Great Britain.
Financial Health
StableStable · 0% CAGR over 1y
Location
Flexitricity Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsOperates an aggregated demand‑response and electricity balancing portfolio, optimising flexible generation, storage and industrial load for participation in energy markets. Provides asset…
Sells to B2B and public sector customers with flexible energy assets, including battery storage investors, gas peaking plant operators, industrial and commercial businesses, utility companies, and…
Financial Health
StableStable · -53% CAGR over 5y
Location
Bluestone Energy Ltd
Trajectory
5y · 2019–NowFinancial sub-scores
Computed from 5 filingsDevelops and supplies renewable electricity through solar PV, battery energy storage, onshore wind and EV infrastructure projects. Provides grid connection applications, high‑voltage works and…
Serves UK local authorities, water companies, utilities and large corporate businesses involved in renewable energy programmes and infrastructure development across the UK.
Financial Health
StrongStrong · Growing, Hiring · 43% CAGR over 5y
Location
Lower Minety Energy Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDevelops, invests in, and operates large-scale renewable energy projects, including solar, wind, waste-to-energy and battery storage installations, supplying low-carbon electricity to power grids,…
Serves institutional investors, project partners and energy market counterparties involved in large-scale renewable energy, with generated power delivered through electricity grids to homes and…
Financial Health
DistressedDistressed · -9% CAGR over 2y
Location
IQONY RENEWABLES UK LTD
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDevelops and operates renewable energy projects, particularly wind and solar power, and provides engineering, plant services, energy trading, storage and district heating solutions, supporting the…
Serves businesses, municipal utilities and local authorities pursuing energy transition projects, plus municipalities, landowners, co-investors, energy plant operators and project developers in wind…
Financial Health
HealthyHealthy · 0% CAGR over 2y
Location
Trajectory
2y · 2024–NowFinancial sub-scores
Computed from 2 filingsDesigns, develops and operates private‑wire renewable energy projects that supply electricity directly to industrial and commercial users. Manages land acquisition, permitting, financing and…
Serves industrial businesses and large power users with significant electricity demand, including organisations managing multiple sites or portfolios across Europe, seeking direct renewable energy…
Financial Health
DistressedDistressed · -10% CAGR over 1y
Location
Kingdom Energy Limited
Trajectory
3y · 2021–NowFinancial sub-scores
Computed from 3 filingsDevelops and invests in renewable energy projects, particularly solar PV. Provides project development, EPC engineering and construction, equipment supply, battery storage integration, and operation,…
Serves renewable energy investors, project developers and IPPs, plus industrial and commercial energy users seeking direct PPAs and gas station operators adding PV, battery storage or charging…
Financial Health
StableStable · Hiring · 14% CAGR over 3y
Location
WELink Energy (U.K.) Limited
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsDevelops, finances and manages renewable energy projects, including utility‑scale solar photovoltaic, wind, storage and hybrid systems. Activities include greenfield development, co‑development,…
Serves utility-scale energy markets and commercial and industrial organisations, working with strategic partners and investors across Europe and Sub-Saharan Africa.
Financial Health
WeakWeak
Location
ENRAY POWER LTD
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsDevelops, owns and operates solar photovoltaic (PV) and battery energy storage system (BESS) projects. Manages project lifecycles including site identification, planning, financing, construction and…
Serves landowners, local communities, developers and businesses, including data centres, seeking renewable energy partnerships linked to solar PV and battery storage projects.
Financial Health
StrongStrong · Hiring · 66% CAGR over 3y
Location
BSR EPC Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDevelops, constructs and operates utility-scale renewable energy projects including solar farms, wind installations and battery storage systems. Provides project development, engineering,…
Serves UK landowners and farmers, corporates seeking power purchase agreements, investors, local authorities and local communities involved in utility-scale renewable energy projects.
Financial Health
WeakWeak
Location
DOWNING ENERGY DEVELOPMENT COMPANY LIMITED
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsDevelops, constructs and operates renewable energy projects, focusing on solar photovoltaic farms, battery energy storage systems and onshore wind assets. Also works with landowners and…
Serves UK landowners with sites suitable for renewable energy development and businesses or organisations seeking power purchase agreements linked to solar, storage and onshore wind projects.
Financial Health
DistressedDistressed
Location
Boom Power Ltd
Trajectory
4y · 2021–NowFinancial sub-scores
Computed from 4 filingsDevelops, builds, owns and operates renewable energy projects including solar farms and battery energy storage systems. Manages project development, planning, construction and operation of…
Targets UK landowners, renewable energy investors, utilities and independent power producers, with large-scale solar and battery schemes intended to serve local communities and households.
Financial Health
StableStable · Hiring · 114% CAGR over 4y
Location
BLACK HILL WIND FARM LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDevelops and operates onshore wind farm projects that generate electricity from wind turbines and supply power to the grid. Activities include planning, construction and operation of turbines and…
Sells to B2B energy-market counterparties purchasing wind-generated electricity and related benefits, including power offtakers and grid or wholesale electricity buyers.
Financial Health
DistressedDistressed
Location
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsOwns and manages a portfolio of solar and flexible power generation assets, funding the development and acquisition of ground-mounted, commercial rooftop, and residential solar installations and…
Targets investors and shareholders seeking exposure to UK renewable energy assets, particularly solar and flexible power generation portfolios with subsidy-backed returns.
Financial Health
WeakWeak
Location
Trajectory
2y · 2022–NowFinancial sub-scores
Computed from 2 filingsDevelops large-scale renewable energy projects and electricity transmission links, including international interconnectors, to generate and deliver clean power. Acts as a project developer and…
Serves governments, energy-sector partners and grid stakeholders involved in national electricity systems, with end demand from communities and energy-intensive sectors such as AI and electric…
Financial Health
StrongStrong
Location
TLS ENERGY LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsAcquires, develops and manages renewable energy assets across hydro, wind and solar. Provides engineering consultancy and maintenance for hydropower schemes, trades renewable energy certificates, and…
Serves renewable energy asset owners, developers and independent generators, including micro and small hydropower operators. Also targets businesses, public sector organisations, homeowners and large…
Financial Health
HealthyHealthy · -90% CAGR over 2y
Location
INNOVA RENEWABLES DEVELOPMENTS LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDevelops and advises on utility‑scale renewable energy projects, including solar power and energy storage systems. Provides project development services such as design, financing, construction…
Serves businesses and communities, especially large energy-intensive organisations, as well as landowners, investment partners, energy buyers and suppliers involved in utility-scale renewable energy…
Financial Health
StrongStrong · Hiring · 13% CAGR over 2y
Location
PULSE CLEAN ENERGY LIMITED
Trajectory
2y · 2021–NowFinancial sub-scores
Computed from 2 filingsDevelops, builds and operates battery energy storage systems that balance electricity grids and support integration of renewable power. Provides energy storage infrastructure and tools to monitor…
Serves energy-sector organisations involved in renewable infrastructure, including grid operators, BESS investors, asset owners and other stakeholders in the UK battery storage market.
Financial Health
HealthyHealthy · Profitable, Hiring · 29% CAGR over 1y
Location
WiseEnergy International Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides asset management and operational services for large-scale solar power plants, including development support, construction management, performance monitoring, revenue optimisation, contract…
Serves B2B clients that own or invest in large-scale solar plants, including global solar asset owners and renewable energy investors with operational or under-construction portfolios.
Financial Health
StrongStrong
Location
ENERGY IO LTD
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsProvides engineering, project management and technical integration services for renewable energy and electrical infrastructure projects, including wind farms, battery storage systems and grid…
Serves B2B clients developing and delivering large-scale energy infrastructure, including major developers, EPC contractors, and UK distribution and transmission network operators in renewables and…
Financial Health
StrongStrong
Location
CONSTANTINE WIND ENERGY LIMITED
Trajectory
2y · 2024–NowFinancial sub-scores
Computed from 2 filingsOwns and operates onshore wind turbines for electricity generation. Provides operational management, maintenance, and asset management for wind turbine portfolios, including feed‑in tariff eligible…
Financial Health
StableStable · 8% CAGR over 1y
Location
IMMERSA LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides battery energy storage and solar integration solutions for commercial and utility-scale energy projects, including system sizing, engineering design, equipment supply, installation, and…
Sells to solar installers, EPC contractors, renewable energy developers and partners delivering small and large commercial, industrial and utility-scale energy projects for UK business clients.
Financial Health
DistressedDistressed · -86% CAGR over 2y
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
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
Pathfinder Clean Energy (PACE) Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops and invests in clean infrastructure projects including solar energy generation, battery energy storage systems, and renewable‑powered data centres. Partners with investors and landowners to…
Serves institutional investors, family offices and corporate high-energy users seeking clean infrastructure opportunities, alongside landowners with sites for renewable energy, storage and…
Financial Health
WeakWeak · 0% CAGR over 4y
Location
Trajectory
2y · 2024–NowFinancial sub-scores
Computed from 2 filingsActs as a holding and investment company for battery energy storage system (BESS) projects. Develops, owns and manages grid-scale battery storage assets that store electricity and supply power to…
Serves electricity networks, project partners and infrastructure investors involved in battery energy storage, alongside local communities affected by projects. Targets energy-sector stakeholders…
Financial Health
StrongStrong
Location
BROCKWELL ENERGY SERVICES LIMITED
Trajectory
2y · 2024–NowFinancial sub-scores
Computed from 2 filingsDevelops, finances and manages renewable energy infrastructure projects, including onshore wind, solar photovoltaic and battery energy storage systems. Provides project origination, development,…
Serves businesses, energy-sector partners and project stakeholders across the UK involved in renewable infrastructure, including onshore wind, solar, battery storage and energy-from-waste assets.
Financial Health
DistressedDistressed
Location
F & S ENERGY ASSET HOLDINGS LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsPurchases electricity from renewable energy generators under power purchase agreements and sells renewable electricity to businesses. Acts as a Feed‑in Tariff licensee and manages export payments and…
Serves UK businesses seeking renewable electricity supply, and renewable power generators such as PV solar and hydro owners selling exported electricity; also works with energy consultants and…
Financial Health
StrongStrong
Location
CLEAN EARTH ENERGY LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops and delivers commercial renewable energy projects including wind turbines, solar PV rooftop and ground‑mounted systems, and energy storage. Provides project development, installation,…
Serves UK businesses, commercial property owners and renewable asset owners, including organisations with sites suitable for rooftop or ground-mounted solar, single turbines or small wind…
Financial Health
HealthyHealthy · Hiring · 15% 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
PELAGIC ENERGY DEVELOPMENT LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops and manages energy infrastructure projects including flexible power generation plants, battery energy storage systems, and solar farms. Works with landowners and investors to identify sites,…
Targets UK landowners with suitable sites and investors seeking renewable energy, flexible generation, battery storage and solar farm opportunities; indirectly serves the UK electricity market and…
Financial Health
StableStable · -68% CAGR over 4y
Location
LUMINOUS ENERGY GROUP LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDevelops large-scale solar photovoltaic farms and battery energy storage projects. Activities include site identification, land agreements, project design, planning and permitting, and managing…
Serves business and landowner customers involved in large-scale renewable energy projects, particularly utility-scale solar and energy storage. Targets landowners and project stakeholders in the UK,…
Financial Health
HealthyHealthy · Hiring · 11% CAGR over 2y
Location
Trajectory
1y · 2025–NowDevelops utility-scale solar photovoltaic and battery energy storage projects. Identifies and secures sites, prepares project designs, manages planning approvals, and advances renewable energy…
Serves local communities, planning stakeholders and energy-sector partners connected with UK utility-scale solar and battery storage projects.
Financial Health
Insufficient historyInsufficient history
Location
BRIGHTER GREEN ENGINEERING LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides operations and maintenance services for solar power plants, including remote monitoring, corrective and preventative maintenance, repowering and inverter installation, spare parts…
Serves owners, operators, investors and asset managers of utility-scale solar power stations and battery storage sites in the solar industry, with customers in the UK and internationally.
Financial Health
HealthyHealthy · -67% CAGR over 4y
Location
PORT OF SHEERNESS WIND FARM LIMITED
Trajectory
5y · 2022–NowFinancial sub-scores
Computed from 5 filingsGenerates renewable electricity through the operation of onshore wind turbines at the Port of Sheerness wind farm. Manages wind power assets and sells generated electricity to the grid under power…
Sells to wholesale electricity market counterparties, such as utilities, energy traders or corporate offtakers, through power purchase agreements in the UK renewable energy sector.
Financial Health
StrongStrong
Location
ONE PLANET DEVELOPMENTS LTD
Trajectory
4y · 2021–NowFinancial sub-scores
Computed from 4 filingsDevelops large-scale solar farm and battery energy storage projects. Provides development management, grid connection and planning permission support, secures land and project rights, and manages…
Serves UK landowners and renewable energy investors involved in large-scale solar farm and battery energy storage projects, including those seeking joint venture or project rights partners.
Financial Health
HealthyHealthy · 0% CAGR over 4y
Location
Island Green Power UK Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsDevelops utility-scale solar photovoltaic and battery energy storage projects. Identifies sites, prepares project designs, manages planning approvals, and brings renewable energy developments through…
Serves energy-sector partners, landowners, local authorities and communities involved in utility-scale solar PV and battery storage projects, mainly in the UK.
Financial Health
StableStable · Hiring · 54% CAGR over 5y
Location
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsDevelops renewable energy projects focused on utility‑scale solar farms and grid‑scale battery storage systems. Works with landowners to identify and develop sites and manages the planning and…
Targets landowners and energy-sector partners with sites suitable for utility-scale solar and grid-scale battery storage projects, primarily in a B2B infrastructure development context.
Financial Health
StableStable
Location
NEWTON DOWN WINDFARM LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsOperates an onshore wind farm that generates electricity from renewable energy using wind turbines. Develops and manages wind energy generation assets and sells the produced power to electricity…
Sells to wholesale electricity buyers, utilities and energy trading counterparties through power purchase agreements, with revenue also linked to UK renewable energy certificate schemes.
Financial Health
StrongStrong
Location
Pathfinder Clean Energy (PACE) UKDEV Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops and invests in clean infrastructure projects including solar power generation, battery energy storage systems, and renewable‑powered data centres. Originates, finances and manages energy and…
Serves institutional investors, family offices, corporate high-energy users and landowners seeking clean infrastructure opportunities in solar, storage, data centres and grid infrastructure.
Financial Health
WeakWeak · Hiring · 41% CAGR over 4y
Location
CROCKBARAVALLY WIND FARM LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsGenerates electricity from renewable energy through the development, construction and operation of onshore wind turbines. Sells power produced by its wind farm under power purchase agreements and…
Serves wholesale electricity buyers, energy suppliers and other creditworthy power market counterparties purchasing renewable generation under PPAs, with income also linked to the UK ROC regime.
Financial Health
HealthyHealthy
Location
SUNNERG LTD
Trajectory
5y · 2022–NowFinancial sub-scores
Computed from 5 filingsProvides engineering, procurement and construction (EPC) services for renewable energy projects. Develops investment opportunities, designs and builds utility‑scale and rooftop installations, and…
Serves B2B clients in the renewable energy sector, including investors, project owners and commercial customers developing utility-scale and rooftop installations across European markets.
Financial Health
StrongStrong · Hiring · 7% CAGR over 4y
Location
Foster Turner Hydro Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops, constructs and operates hydroelectric power schemes and other renewable energy projects. Manages planning, optimisation and operation of small‑scale hydro installations and develops new…
Financial Health
StrongStrong · Growing, Hiring · 6% CAGR over 4y
Location
Powersystems UK Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns and installs high‑voltage electrical infrastructure and power distribution systems. Provides grid connections, substation design and build, cabling, testing, commissioning and maintenance for…
Serves B2B customers in renewable energy, generation, grid stability, battery storage, EV infrastructure, nuclear, and commercial/industrial sectors, including developers and operators of…
Financial Health
StrongStrong · Growing, Hiring · 15% CAGR over 4y
Location
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides energy management and renewable energy services, including onshore wind turbine asset management and remote monitoring, solar PV system design and installation, EV charging infrastructure,…
Serves businesses and asset owners in the UK and Ireland, including commercial and industrial energy users, farms, motor dealerships, depot operators and onshore wind turbine owners.
Financial Health
StableStable · 1% CAGR over 3y
Location
Utilligence Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides high‑voltage power engineering and grid connection services for renewable energy and power generation projects, including feasibility studies, network design, substation and switchgear…
Serves renewable energy developers, power generators and backup power providers, mainly in the UK and Ireland, including developers of solar farms, wind projects, battery storage sites and private…
Financial Health
StableStable · Hiring · 10% CAGR over 4y
Location
UNITED DOWNS GEOTHERMAL LIMITED
Trajectory
5y · 2022–NowFinancial sub-scores
Computed from 5 filingsDevelops geothermal energy projects that generate electricity and heat, and extracts lithium from geothermal brines using low‑carbon processes. Involved in developing and operating geothermal power…
Serves investors, local communities, educators and public stakeholders interested in UK geothermal energy and ultra-low carbon lithium projects, with a clear emphasis on clean energy and green…
Financial Health
HealthyHealthy
Location
Twinwoods Heat & Power Limited
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsOperates a licensed biomass facility that processes hazardous waste wood and contaminated fabrics, including oily rags, to generate electricity exported to the National Grid. Also provides advice and…
Serves businesses that generate hazardous or contaminated wood waste and oily fabrics, including construction, rail, fencing and industrial operators needing audited disposal routes under Environment…
Financial Health
WeakWeak · Hiring · 12% CAGR over 2y
Location
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How UK Renewable Energy companies work and how to sell to them
What they do
Revenue usually comes from a blend of asset economics and contracted services rather than a simple unit sale. Developers may earn through development fees, project sale proceeds, grid-connection milestones or retained equity in operating assets. Operators earn from electricity sales, power-purchase agreements, supply margins, availability payments and operations contracts tied to generation, uptime or response times. Engineering and maintenance specialists price by project, retainer or call-out schedule, while data-led firms may use licence or subscription models for monitoring and optimisation. Engagements tend to be lumpy: a feasibility study can be small, but asset delivery or multi-site service work brings legal review, insurance, finance and technical due diligence into the buying process.
Who they sell to
Typical customers include energy-intensive businesses, commercial landlords, local authorities, utilities, infrastructure investors and public bodies with estate, fleet or decarbonisation programmes. Smaller specialists may sell feasibility, surveys or metering into facilities and sustainability teams, while larger developers and operators negotiate with finance, procurement, legal and engineering stakeholders. Buying is usually committee-led because contracts affect budgets, land rights, grid access, operational risk and carbon reporting. Direct sales and relationship-led origination matter, but public-sector work often moves through frameworks or formal tenders. Self-serve purchasing is rare outside narrow monitoring tools, and sales cycles tend to lengthen once planning, finance or regulated supply obligations enter the process.
What they buy
Most renewable energy firms tend to spend on project-development services, grid studies, planning advice, environmental assessment, land and property legal work, insurance, tax structuring and project finance support. Operators also buy asset monitoring, forecasting, field-service management, work-order scheduling, metering, cyber security, compliance reporting and document-control tools. Firms with supply or customer-facing activity need billing, CRM, customer service, contract management and credit-risk processes. Headcount growth creates demand for recruitment, health and safety training, HR systems and payroll. Sellers should expect procurement to test references, liability terms and sector experience, because failures can affect uptime, reporting duties and contract penalties.
Why and how to sell to them
Buying intent often appears when a business moves from development pipeline to operating assets, takes on a larger site portfolio, refinances projects, hires senior finance or operations staff, or prepares for an audit, licence change or tender. Pain points are usually practical: connection delays, contractor coordination, manual reporting, curtailment, asset downtime, warranty claims, cash-flow timing and evidence for counterparties. Outbound works better when it maps to a live operational risk or revenue event, rather than a general sustainability message. Useful angles include shortening reporting cycles, protecting contracted availability, improving margin visibility, reducing site-visit burden or making procurement and compliance evidence easier to defend.
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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