What Clarke Energy does

Clarke Energy is a UK-headquartered (Knowsley, near Liverpool) engineering, procurement, and construction (EPC) specialist in distributed power generation, founded in 1995 and operating as a private subsidiary of Rehlko (Discovery Energy, LLC). The company serves as the exclusive authorized distributor and service provider for INNIO Group's Jenbacher gas engines (Types 2, 3, 4, and 6) across 27 countries on five continents, with a globally installed base exceeding 10 GW of gas engine capacity, 1.5 GW of which utilizes renewable fuels. Clarke Energy delivers projects ranging from single-engine installations to full turnkey multi-engine power plants, with long-term contracted maintenance providing supply certainty for customers.

The company's product portfolio centers on high-efficiency, fuel-flexible gas engines capable of operating on natural gas, biogas, hydrogen, coal gas, syngas, flare gas, propane, furnace gas, and CNG/LNG, achieving combined heat and power (CHP) electrical and thermal efficiency rates up to 90%. Complementary offerings include battery energy storage systems (BESS), microgrids and hybrid energy systems, membrane-based biogas upgrading systems (including India's first such installation in Chennai), hydrogen generation and use solutions, and carbon capture technologies. Rehlko backup generators are also distributed in Australia and Nigeria.

Clarke Energy's business model combines hardware sales (gas engine installation), EPC project delivery, and recurring managed services (commissioning, maintenance agreements, remote monitoring, spare parts, and technical training). Revenue is project-specific and quote-based, with multi-year contract cadences. The company targets enterprise customers across manufacturing (ceramics, chemicals, pharmaceuticals, steel, food and drink), extraction (mining, oil and gas), waste management (food waste, landfill, wastewater), data centers (hyperscale, colocation, edge), district energy, hospitals, independent power producers, and utilities/ EV charging. With 1001-5000 employees, local engineering teams in each of the 27 countries, and recognition through the Renewable Energy Association's Skills Leadership Award in 2026, Clarke Energy operates an enterprise field sales and complex project delivery model with no publicly disclosed revenue.

Name

Clarke Energy

Legal name

Clarke Energy

Website

https://clarke-energy.com

Company type

Private

Founded year

1995

Operating status

Operating

Headcount range

51–100 employees

Short description

Clarke Energy is a UK-based EPC specialist and exclusive authorized distributor of INNIO Jenbacher gas engines across 27 countries, delivering distributed power generation, battery storage, biogas upgrading, and microgrid solutions to enterprise customers in manufacturing, data centers, waste management, and extraction industries.

Ownership category

akta.pro rank

Product category

Distributed Power Generation Equipment

NAICS

Electric Power Generation (22111), Turbine and Turbine Generator Set Units Manufacturing (333611), Fossil Fuel Electric Power Generation (221112), Engine, Turbine, and Power Transmission Equipment Manufacturing (3336)

SIC

Engines & Turbines (3510), Cogeneration Services & Small Power Producers (4991)

akta.pro primary industry

Engine Generator & Microgrid Power Plant EPC (Diesel/Gas Recip) (EUAEAAAJ)

akta.pro secondary industries

Gas-Fired Power Plant O&M and Life-Extension/Repowering Services (EUACABAJ), Microgrid & Distributed Grid Equipment (Controllers, Switchgear Packages, DER Interconnection) (IMAGAAAJ), Thermal Power Plant EPC (Gas/Coal/Oil) (EUAEAAAA)

Keywords

• Distributed power generation
• Gas engine solutions
• Combined heat and power
• Biogas upgrading systems
• Engineered power plants

Headquarters

HQ city

Liverpool

HQ country

United Kingdom

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Operations, Infrastructure, Technology or R&D, Marketing or Sales

Revenue model

1. Gas Engine Sales and Installation: Sale and installation of Jenbacher gas engines (Types 2, 3, 4, and 6) for electricity generation, CHP, trigeneration, quadgeneration, peaking stations, hybrid power, standby power, and remote power applications. Engines operate on various fuels including natural gas, biogas, hydrogen, and other gaseous fuels.
2. EPC Services: Engineering, Procurement, and Construction services for power generation projects, delivering complex projects for industrial applications with full project management, installation, and commissioning.
3. Aftermarket Service and Maintenance: Comprehensive aftersales service including commissioning, maintenance agreements, technical training, remote monitoring and diagnostics, field service, spare parts, overhaul and repairs, and conversions/modifications/upgrades. Local service teams in each country with local stores of OEM approved parts.
4. Biogas Upgrading Systems: TPI biogas upgrading systems that convert raw biogas into biomethane suitable for grid injection or vehicle fuel, supporting India's SATAT bio-CNG initiative.

Pricing tiers

Go-to-market motion1 record

Distribution channels4 records

Marketing channels5 records

Core offering

Clarke Energy engineers, installs, and maintains engine-based distributed power generation plants, serving as the authorized distributor of INNIO Jenbacher gas engines (Types 2, 3, 4, and 6) across 27 countries. The company delivers turnkey solutions from single engines to multi-engine plants, including combined heat and power (CHP), battery energy storage systems (BESS), microgrids, biogas upgrading, hydrogen systems, and carbon capture. Its offering is anchored by long-term maintenance agreements and EPC project delivery for industrial, data center, waste management, and extraction sector customers.

Product overview

Clarke Energy provides distributed power plant solutions with market-leading engineering, installation, and maintenance support. The product portfolio centers on INNIO Jenbacher gas engines (Types 2, 3, 4, and 6), for which Clarke Energy is the authorized distributor in 27 countries. Complementary offerings include TPI Biogas Upgrading Systems for converting biogas to biomethane, Battery Energy Storage Systems (BESS), Microgrids and Hybrid Energy Systems, Hydrogen Generation and Use solutions with hydrogen-ready engines, and Carbon Capture technologies. Rehlko Backup Generators (available through Rehlko South Pacific and Rehlko Nigeria) round out the portfolio. The company also offers Combined Heat and Power (CHP) configurations and specialized Data Center Power Solutions. Clarke Energy, a subsidiary of Rehlko, operates across 27 countries with over 10GW of power supplied globally.

Differentiator

Problem solved

Functional benefit

Brands

• INNIO Jenbacher: Clarke Energy is the authorized distributor and service provider for INNIO Group's Jenbacher gas engines in 27 countries, offering Type 2, Type 3, Type 4, and Type 6 gas engines.
• TPI Biogas Upgrading
• Rehlko

Products and services

• INNIO Jenbacher Gas Engines High-efficiency, fuel-flexible gas engines operating on low-carbon and renewable fuels for distributed power generation. Available in Type 2, Type 3, Type 4, and Type 6 configurations. Clarke Energy is the authorized distributor and service provider for INNIO Group's Jenbacher gas engines in 27 countries.
• TPI Biogas Upgrading Systems Turnkey biogas upgrading solutions that clean biogas into biomethane (renewable natural gas). Membrane-based systems that maximize renewable gas potential from organic waste streams.
• Battery Energy Storage Systems (BESS) Flexible, scalable, and fast-responding storage solutions to optimize energy use and support decarbonization. Includes turnkey systems, remote monitoring, and maintenance services.
• Microgrids and Hybrid Energy Systems Resilient, decentralized energy systems delivering reliable, flexible, and low-carbon power. Integrated smart power systems for independent, efficient energy control combining solar, BESS, CHP, and backup generation.
• Hydrogen Generation and Use Flexible, scalable hydrogen energy systems including hydrogen production with electrolysers and hydrogen use as a fuel in gas engines, supporting the transition to net zero. Includes hydrogen-ready gas engines.
• Carbon Capture Supporting emissions reduction from decentralized energy systems including pre-combustion from biogas upgrading facilities and post-combustion from gas engines. Captured CO2 can be processed for reuse in industrial, food-grade, or agricultural applications.
• Rehlko Backup Generators Reliable backup power systems supplied by Clarke Energy in Australia (Rehlko South Pacific) and Nigeria (Rehlko Nigeria). Part of Rehlko's energy resilience solutions portfolio.
• Data Center Power Solutions Resilient, efficient, and sustainable behind-the-meter power systems for data centers and mission-critical infrastructure. Includes hybrid engine and BESS systems, microgrids, and CCHP systems for cooling.

Quantifiable outcome

• Up to 90% combined electrical and thermal efficiency through CHP configurations
• +3 more outcomes

Named customers2 records

Segments8 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Three partnerships are on record, tiered core and minor.

• INNIO GroupcoreTechnology or Integration · 9 April 2026Over 30-year strategic partnership with INNIO Group as authorized distributor and service provider for Jenbacher gas engines across 27 countries. Supports a global installed base of over 10 GW of gas engine capacity. The partnership was expanded through a multi-year strategic engine framework agreement securing approximately 1.25 GW of gas engine capacity over three years to meet accelerating demand from data centers and flexible generation projects globally. Clarke Energy delivers scalable hybrid power solutions with long-term contracted maintenance through this partnership.
• Renewable Energy Association (REA) - Data Center CoalitioncoreStrategic or Co-development Partner · 1 December 2025Clarke Energy, as part of Rehlko, joined the REA's Data Center Coalition alongside enfinium, Greenscale, and Apatura. The coalition develops clean-power models and provides evidence-based policy input to government for the UK's data center sector, addressing the sector's rapidly growing energy demand alongside sustainability goals.
• Srinivas Waste Management Services Private Limited (SWMS)minorImplementation/ SI/ Consulting Partner · 9 October 2025Clarke Energy commissioned India's first membrane-based biogas upgrader at SWMS's municipal waste site in Chennai. The project supports India's SATAT bio-CNG initiative, upgrading biogas into high-purity biomethane and replacing an older pressure swing adsorption system.

Scale indicators7 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Wärtsilä: Finland-based global supplier of engine-based power plants and lifecycle services for flexible, distributed, and grid-balancing generation. Closely comparable to Clarke in delivering multi-engine turnkey plants, CHP, and long-term service contracts to utilities, industrials, and IPPs.
• INNIO Group: Manufacturer of Jenbacher and Waukesha gas engines used in distributed power, CHP, and renewable fuel applications. INNIO is Clarke's OEM partner and direct counterpart in the gas-engine EPC value chain, with overlapping end customers and project types.
• Caterpillar (Electric Power): Global manufacturer of gas and diesel generator sets, with installed base in industrial, data center, and utility applications. Comparable to Clarke in offering engine-based distributed generation plus aftersales service, though broader and not specialist EPC.
• Cummins: Diversified power generation manufacturer with gas and diesel generator sets, BESS, and microgrid offerings. Overlaps with Clarke in distributed engine power, hybrid solutions, and aftermarket service for industrial and data center customers.
• MAN Energy Solutions: Supplies large-bore gas and dual-fuel engines for utility-scale power generation, CHP, and renewable fuel applications. Comparable to Clarke in delivering complex engine-based power plants and lifecycle services globally.
• Rolls-Royce Power Systems (MTU): Provides MTU-badged gas and diesel generator systems, CHP, and microgrid solutions under Rolls-Royce. Comparable to Clarke in distributed power, mission-critical backup, and gas-fuel-flexible engine offerings.
• Aggreko: Global provider of temporary and modular power generation, including gas engine and BESS rental solutions. Comparable to Clarke in addressing distributed power, microgrids, and resilience-driven industrial and event-driven customers.
• Generac: Leading manufacturer of backup and prime power generation systems including gas, diesel, and BESS, with growing data center exposure. Comparable to Clarke in industrial/mission-critical engine power, though primarily product-sale versus full EPC.

Broad incumbents

• Siemens Energy: Major OEM across gas turbines, grid technology, and large-scale power EPC. Competes with Clarke on utility-scale and industrial power projects but at a much broader portfolio scale, not specialized in small-to-mid Jenbacher-class engines.

Others

• Schneider Electric: Provides microgrid control systems, energy management software, and BESS integration that pair with engine-based assets. Adjacent ecosystem participant enabling hybrid projects like Clarke's gas+BESS offerings for data centers and industrial sites.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/clarkeenergy
• YouTubeyoutube.com/channel/UCk8yPGKae3FdoPVTj-X3c3A
• Facebookfacebook.com/ClarkeEnergy
• LinkedInlinkedin.com/company/clarke-energy
• Instagraminstagram.com/clarkeenergy

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds1 record

Investors1 record

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A1 record

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Clarke Energy