Polestar B Corp / Sustainability Context
Polestar’s recent B Corp certification reflects our commitment to responsible business and a future where sustainability drives commercial success.
B Corp defines sustainability as the balanced pursuit of profit, people, and planet. Certified companies must:
Create long-term value for society and the environment
Avoid harm through their operations
Actively contribute to social and ecological well-being
This aligns with the Harvard Business School, which describes sustainability in business as “operating in ways that minimise negative impacts on the environment, society, and communities – while creating value for stakeholders”.
At Polestar, we have six key sustainability subsectors:
Net-zero carbon
Environmental, Social, and Governance (ESG)
Agriculture
Wellbeing
Energy & Waste Management
Recycling and Renewables
The Energy Efficiency Solution Companies (EESC) Market
This paper focuses on Energy Efficiency Solution Companies (EESCs) – firms that support energy and carbon emission reduction through consulting, retrofitting, and clean technologies. These companies often overlap with net-zero and ESG services, to deliver solutions that improve energy performance. Historically, Enterprise Environmental and Sustainability Consultancies (EESCs) have centred their business models around traditional consulting practices. However, this is increasingly a secondary revenue stream as firms pivot towards SaaS-based infrastructure and AI-driven solutions. The shift from pure consulting to scalable technology platforms has significantly enhanced company valuations, as we saw during the sale of EVORA, where its integration of digital capabilities played a pivotal role in its market positioning.
The broader Energy Conservation Companies (ECC) sector is undergoing rapid tranformation, driven by:
Government net-zero mandates
Technological innovation
Industrial demand for cost-saving solutions
Renewed private equity interest
From a 2025 global valuation of £20.5 billion, the ECC market is projected to grow at a CAGR of 8.6% through to 2032.
For UK-based ECCs, global growth presents two major opportunities:
Scale internationally – Leverage UK policy alignment with the EU’s Energy Efficiency Directive and meet rising demand in South and Southeast Asia.
Attract acquirers – Market fragmentation is driving M&A activity. UK firms with AI-driven or vertically integrated solutions are especially attractive to utilities and private equity investors.
Globally, 72% of investors are accelerating capital deployment into the energy transition, with 64% targeting energy-efficient technologies. While the US has relied on legacy infrastructure – dampening its investment leadership – Germany and France have committed a larger share of GDP to carbon reduction, positioning them as European leaders in next-generation Energy Efficiency Solution Companies (EESC).
Post-Brexit, the UK initially fell behind France and Germany in low-carbon investment. However, its regulatory autonomy makes it an attractive destination for overseas capital, offering strong returns amid global market volatility. In 2024, the UK’s net-zero economy grew by 10%, driven by innovation and momentum in the green sector.
Within this landscape, EESC firms stand out, generating £106k in economic value per employee – 38% above the national average. Investment activity is intensifying, as funds acquire niche players to align with net-zero goals. EESCs that integrate AI, adopt hybrid revenue models, and demonstrate recurring income and strong ESG metrics are attracting significant interest from venture capital and infrastructure investors. These firms continue to command premium valuations in a competitive market.
Trends in the sector support valuation metrics and provide goals against which businesses and investors will benchmark decisions. In 2025 key themes consist of:
Supportive Government Policies and Regulations
Energy Prices Driving Industrial Energy Efficiency
Carbon Accountability
AI and Technological Advancements
Supportive Government Policies and Regulatory Drivers
Compliance deadlines are creating immediate demand for energy efficiency services. These projects typically offer 3-5-year contracted revenues, to reduce investment risk and enhance financial predictability.
The EU Energy Efficiency Directive (EED) mandated a 32.5% energy reduction by 2023, requiring 40,000 large firms to audit and improve efficiency. Though the deadline has passed, it created a lasting compliance framework, driving ongoing demand for audits, retrofits, and monitoring.
Although the UK is no longer bound by EU rules, its Clean Power 2030 Action Plan mirrors these ambitions. It targets a c.12% reduction in energy consumption by 2030, supported by domestic regulations such as:
| Regulation / deadline | Requirement |
| ESOS Phase 4 – December 2027 | Companies under pressure to complete mandatory energy audits. >£44m Annual Turnover; >£38m Balance Sheet Totals; 250+ Employees. |
| MEES EPC Band B – by 2030 | Required for all commercial (non-domestic rented) property by 2030. |
To meet these deadlines and avoid penalties, utility companies are acquiring niche auditors and retrofitters to build compliance capabilities.
Energy auditors, such as Enistic, play a critical role in identifying energy waste and ensuring regulatory compliance. Retrofitters deliver upgrades such as heat pumps, insulation, and IoT-enabled systems to help clients meet efficiency targets.
Often, utilities that acquire these firms offer end-to-end solutions – to combine audits, retrofits, and grid-flexibility services. This model provides two key advantages for UK Energy Efficiency Service Companies (EESCs):
| Short-Term Revenue Certainty | Long-Term Growth Potential |
| Demand for turnkey compliance solutions is rising as businesses seek to avoid penalties – such as Minimum Energy Efficiency Standards (MEES) fines of up to £150,000 per property. | Ongoing demand for retrofits, IoT monitoring, and smart grid upgrades is supported by a £938bn market opportunity tied to binding energy-saving action plans. |
Firms such as Enistic and OnGen, which specialise in automated audits and feasibility assessment tools, are rapidly scaling to meet this surge in demand. Their ability to streamline compliance processes makes them attractive acquisition targets for utilities seeking turnkey regulatory expertise.
| Field | Extracted copy |
| Founded | 2009 |
| Location | Oxford, UK |
| Focus | ESOS compliance, carbon accounting |
Enistic provides cloud-based tools to help businesses cut energy use and meet regulatory requirements. Over 90% of its revenue comes from mandates like ESOS Phase 3 and the EU’s CSRD. Its SaaS model guarantees compliance, helping firms avoid penalties of up to £500/day for missing ESOS deadlines. This makes Enistic a go-to solution as businesses rush to meet Phase 4 requirements by December 2027.
The platform also improves operational efficiency by 20% through smart integrations. Enistic has raised funding through two angel rounds and is well-positioned for growth or acquisition.
Rules, rising investor interest, and strong company valuations are all pointing to a key moment for the energy efficiency sector. For EESCs, now is a good time to think about next steps – whether that’s growing the business, raising money, or getting ready for future deals. Companies that move early will be in a stronger position as the market continues to grow and develop.
| Field | Extracted copy |
| Founded | 2014 |
| Location | Edinburgh, UK |
| Focus | Energy audits, low-carbon feasibility tools, ESOS compliance |
OnGen develops digital tools that help UK businesses assess energy use and identify cost-effective, low-carbon technologies. Its core products – OnEfficiency and OnGen Expert™ – support compliance with schemes like ESOS Phase 4 by automating audits and recommending site-specific energy solutions.
Meet mandatory audit requirements
Improve Energy Performance Certificate (EPC) ratings
Cut energy costs and emissions
OnGen operates a SaaS and managed service model, offering both self-serve tools and full-service compliance support. It has received multiple rounds of grant and VC funding, including backing from Innovate UK and other institutional investors.
A shared UK and EU market presents a strategic opportunity for firms such as Sava, a low carbon building software developer, to accelerate growth. Harmonised standards for energy audits and retrofit practices across both regions enable scalable service delivery and cross-border consistency, supporting expansion and operational efficiency. Consulting forward firms that earn over 30% of their revenue from regulatory-driven services command 8-12x EBITDA multiples, far ahead of the 5-7x for generalist consulting firms.
Meanwhile, the UK’s Market-wide Half-Hourly Settlement (MHHS) reforms are in step with the EU’s Digitalising the Energy System strategy – together creating a €580 billion opportunity for smart, AI-powered energy tools. Industry reports indicate that SaaS-driven companies, particularly those operating in ESG and compliance verticals, are trading at valuation multiples of 9 to 12 times Annual Recurring Revenue (ARR), underscoring the strategic value of scalable, data-led platforms in the energy transition.
GridBeyond, an AI cleantech platform, is already attracting serious investor interest by offering scalable solutions that fit both markets and meet rising demand for intelligent energy management.
| UK’s Market-wide Half-Hourly Settlement (MHHS) | EU’s Digitalising the Energy System Strategy |
| Aim’s to: Track electricity use every 30 minutes; Help people get fairer bills; Encourage smarter energy habits. Part of a bigger push to modernise the energy system. | Using tech like sensors and smart apps: Cleaner energy; More efficient; Easier to manage. |
| Field | Extracted copy |
| Founded | 2010 |
| Location | Dublin, Ireland |
| UK Expansion | 2012 |
| Total Funding Raised | £72.02m |
GridBeyond is an AI-powered energy platform that helps businesses manage electricity use more efficiently. Since expanding into the UK, it has become a key player in the smart grid and demand response space. The company has attracted later-stage VC funding from global investors, including:
Energy Impact Partners (US)
Yokogawa (Japan)
ABB (Switzerland) – a strategic investor that now uses GridBeyond’s AI software with its automation hardware
GridBeyond’s platform supports cross-border scalability, aligning with both UK and EU energy reforms. Its ability to integrate AI with hardware solutions makes it a strong candidate for further growth and acquisition.
Energy prices are climbing, to stay competitive, global industries are turning to energy efficiency as a key strategy. Energy price volatility is expected to increase product/services costs in 2025, as 83% of UK businesses anticipate higher consumption due to AI, automation and electrification trends.
Heavy industries like cement and steel, and wider manufacturing industries are cutting energy waste with smart grids, process optimisation, and heat recovery tech. India recovers 5.4 million gigajoules (GJ) of energy annually from long-term policy support since 2010. Driven by policies such as the National Mission on Enhanced Energy Efficiency, which targeted heavy industries to install heat exchangers, economisers, and cogeneration systems. The UK could replicate this scale via the Industrial Energy Transformation Fund (IETF), which funds heat recovery tech in energy-intensive sectors. Success would depend on sectoral adoption rates, investment in retrofitting infrastructure, and alignment with net-zero targets.
UK Manufacturing small and medium enterprises (SMEs) using Enhanced Capital Allowances (ECAs) – a tax relief scheme that lets businesses deduct the full cost of energy-efficient equipment – achieve 25-40% energy cost savings with upgrades to LED lighting, high efficiency boilers and IoT driven monitoring systems. AI and IoT help market participants pinpoint inefficiencies in real time and have reduced energy waste by 15 – 30%.
Across Europe, demand for energy-saving software – like predictive maintenance and tariff optimisation – is growing. Private equity and venture capital are increasingly backing startups in this space, with UK firms like GRYD Energy and Electron raising millions to scale clean tech solutions.
The Science-Based Targets initiative (SBTi) is a global framework that enables companies to set greenhouse gas emissions reduction targets aligned with the latest climate science and the goals of the Paris Agreement. It provides methodologies and validation to ensure corporate climate commitments are measurable, credible, and consistent with limiting global warming to 1.5°C.
UK investors are tightening the net. Firms without verified emissions data risk excluding themselves from consideration by ESG portfolios – funds that collectively manage over £2.3 trillion in UK assets.
To maintain the green finance option for clients, UK-based EESCs are actively advising on ways to cut emissions by 20 – 30%.
EESCs have demonstrated that clients who secure their climate goals via Science-Based Targets initiative (SBTi) validation typically report a c.18% improvement in EBITDA margins, driven by operational efficiencies and lower carbon levies. From an EESC perspective, a firm generating 40% of its revenue from emissions reduction typically trades at 9-14x EBITDA, compared to 5-7x for traditional firms.
PE firms are taking this a step further, integrating carbon auditors, retrofitters, and renewable energy developers into unified decarbonisation platforms – A clear example is Palatine’s acquisition of Energist and its partnership with Ecology Building Society.
Carbon tracking across supply chains is becoming increasingly critical as regulatory measures tighten. The UK’s Carbon Border Adjustment Mechanism imposes tariffs on imports from high-emission regions, incentivising companies to monitor and reduce their carbon footprint. EESCs that provide robust carbon tracking help clients avoid these penalties, creating reliable, long-term revenue streams. This “sticky” revenue model attracts higher valuations and investor interest.
EESCs such as Tokamak Energy and Oxford PV are preparing for IPOs in 2026–27, capitalising on investor appetite for pure-play climate tech. Meanwhile, 72% of UK corporates lack Science-Based Targets initiative (SBTi)-aligned plans, underscoring the urgent need for EESC support.
The convergence of investor pressure, regulatory shifts, and corporate demand presents a rare window of opportunity. The London Stock Exchange (LSE) has recognised the potential growth, awarding its Green Economy Mark to LSE and AiM market companies earning over 50% of their revenue from sustainable solutions. In the private market, other PE firms are following in the footsteps of earlier adopters such as Bridges and Palatine in launching impact funds, driving healthy competition among firms seeking to enhance their ESG credentials.
Verified emissions data, recurring revenue, and alignment with SBTi standards are no longer optional—they’re valuation drivers. Whether preparing for a fundraise, strategic acquisition, or IPO, EESCs that position themselves as indispensable climate partners will attract capital and command premium multiples.
Artificial intelligence is rapidly becoming a key driver of value in the UK’s energy efficiency sector. The UK has the fastest-growing group of AI-powered energy innovators in Europe, attracting strong interest from global investors who pay a premium for proprietary algorithms. In a market where 72% of private equity firms prioritise tech-enabled acquisitions, companies that fail to embed AI risk falling behind. Those that do are reaping the rewards. EESCs integrating machine learning into their core offerings are commanding valuations 2 – 3× higher than legacy peers.
At the forefront is AI-powered predictive maintenance, which has emerged as a reliable engine for recurring revenue. Companies like Carbon Re use machine learning to forecast energy demand at the factory level, cutting client waste by 20-35%. These platforms operate on subscription models, generate predictable cash flows, and trade at 14 – 18× EBITDA – double that of traditional consultancies.
Edge AI is also reshaping the landscape. By embedding machine learning directly into onsite hardware, firms reduce cloud dependency and cybersecurity risk – unlocking an inferred 15 – 20% valuation premium. Verv, for example, reduced grid dependency in social housing by 40% using edge AI hubs, leading to its £45 million acquisition by British Gas in 2024.
Meanwhile, AI’s role in circular economy models is redefining how value is created. By mapping industrial waste flows to identify recoverable energy, firms like Tocolytics deliver measurable client savings that resonate with ESG-focused investors. Standalone, these circular facilitating models are trading at 10 – 12× EBITDA.
However, trade buyers and PE firms are actively acquiring niche AI providers to consolidate into innovation-led decarbonisation platforms. EESCs that embed AI into their solutions position themselves as scalable building blocks for end-to-end net zero ecosystems, explaining why AI-native firms are attracting 30 – 50% bid premiums in sector roll-ups.
M&A activity in the energy efficiency sector continues to pace, driven by investor demand for scalable, tech-enabled, and compliance-aligned platforms. The following transactions illustrate how strategic buyers and private equity firms are consolidating capabilities, expanding service offerings, and positioning for long-term growth in the net-zero economy.
| Deal / company | Extracted copy |
| Genuit Group / Monodraught | Genuit Group has acquired Monodraught, a leading provider of energy-efficient ventilation and cooling solutions, for a total consideration of £55.6 million. The transaction marks one of BGF’s strongest returns to date, delivering an 11x money multiple and a 37.5% IRR. Since BGF’s investment in 2017, Monodraught has achieved a 7x increase in profitability, driven by significant product innovation and expansion into new sectors and markets. |
| Sustainable Energy First / Inenco | Sustainable Energy First, backed by Beech Tree Private Equity and Qualitas Funds, acquired Inenco in 2024. The merger brings together two energy consultancies with a shared mission: to make renewable energy more accessible and help businesses manage energy spend in line with sustainability goals. |
| Drees & Sommer / RSP Consulting Engineers and VVA Project & Cost Managers | Drees & Sommer expanded its full-service capabilities in 2025 through the acquisitions of RSP Consulting Engineers and VVA Project & Cost Managers. The firm aims to strengthen its position in sustainable design and project delivery. Kenneth Wood, Managing Director, noted that RSP’s expertise in data centres and life sciences complements Drees & Sommer’s sustainability and real estate strengths—creating a platform for innovation and integrated service delivery |
| Fidelity Energy / Blixt Group | Fidelity Energy completed a management buyout (MBO) with investment from Blixt Group. The deal accelerates Fidelity’s expansion across the UK and Europe and supports the development of broader energy, net-zero, and sustainability advisory services. |
| Domna / Leon Capital | Domna, a turnkey energy efficiency firm, was acquired by Leon Capital in a £70 million majority buyout (LBO) in January 2025. The investment supports Domna’s buy-and-build strategy, including the acquisitions of Warmfront and Osmosis ACD, two retrofit surveying and contracting businesses. Domna has also developed proprietary predictive housing stock assessment technology, positioning the group as the UK’s largest specialist retrofit consultancy in social housing. |
| Hometree / GreenGenUK | Hometree, founded in 2015, has raised over £85 million to date and recently secured its first debt facility from funds managed by BlackRock. The facility supports Hometree’s acquisition strategy, which includes five deals over the past two years. Its most recent acquisition, GreenGenUK (January 2025), expands its national footprint in renewable energy installations and strengthens its position in low-carbon home energy solutions. |
The UK energy efficiency sector has entered a pivotal acceleration phase – marked not just by growth, but by transformation. Unlike previous stages driven by early adoption and pilot initiatives, today’s momentum is fuelled by tightening regulation, surging investor interest, and the integration of AI-led innovation. For founders, operators, and investors, the landscape is shifting fast: the opportunity to scale, secure capital, or achieve premium exits is no longer emerging – it’s actively unfolding.
Valuations are strong: We have seen firms with compliance-driven revenue, AI integration, or SaaS models trading at 8-20× ARR, with premiums for those aligned to ESG mandates.
Demand is accelerating: UK and EU regulations are generating a £12 billion+ pipeline for audits, retrofits, and carbon tracking services.
Buyers are active: PE firms and strategic acquirers are consolidating the market, we are told to look out for niche players to build full-service decarbonisation platforms.
AI is a differentiator: Companies embedding AI into their offerings are commanding 30-50% valuation premiums and attracting global capital.
Go to market: If you’re scaling a solution in energy efficiency and plan to go to market in the next few years, now is the time to accelerate growth and capture market share. Contact Polestar to find out more about our Eddystone Club where you will get to learn from like minded business owners, whilst capturing market insight and strategic support.
Fundraise: Investors we speak to are actively searching for and backing firms with recurring revenue, regulatory tailwinds, and scalable tech. If you would like more information how Polestar can support you through a fundraise, or to pick up more information on what investors are looking for, please reach out.
Explore strategic options: Whether you’re considering a sale, acquisition, or partnership, we can help you navigate the landscape and unlock value.
If you’re building in this space or planning your next move, Polestar would love to hear from you. Whether you’re exploring growth capital, strategic partnerships, or a potential exit, we’re here to help.
| Name | Role | Mobile | |
| Charles Whelan | Partner | chwhelan@polestarcf.com | +44 7733 003 487 |
| Richard Hall | Partner | rhall@polestarcf.com | +44 7960 126 559 |
| Conor Barrett | Manager | cbarrett@polestarcf.com | +44 7551 662 199 |
| Anusheh Khan | Analyst | akhan@polestarcf.com | +44 7903 499 589 |
| Ella Bertrand | Analyst | ebertrand@polestarcf.com | +44 7783 424 706 |
Visual / Infographic Notes
Page 1: Full-page green-tinted feature image of a sustainable city model with wind turbines and the Polestar logo.
Page 2: Icons show Polestar’s six sustainability subsectors; right-side image card links to the EVORA case study.
Page 3: Timeline-style compliance graphic shows ESOS December 2027 and MEES EPC Band B by 2030, plus Enistic profile imagery.
Page 4: Side-by-side graphics compare UK MHHS and EU digital energy strategy; GridBeyond profile includes solar panel imagery.
Page 5: Includes Science Based Targets initiative graphic and a renewable/solar image banner.
Page 6: Large wind turbine image supports the AI/energy efficiency section.
Page 7: Recent deal cards use company logos for Genuit, Sustainable Energy First, Drees & Sommer, Fidelity Energy, Domna, and Hometree.
Page 8: Contact cards include headshots for listed Polestar team members and an Eddystone Club call-to-action banner.
