Rehlko

What Rehlko does

Rehlko is a global energy resilience company providing industrial generators, uninterruptible power supply (UPS) systems, microgrids, hydrogen fuel cell systems, battery energy storage (BESS), and powertrain technologies. The company traces its origins to the 1920 Kohler Automatic Power & Light power plant and was spun off from Kohler Co. in May 2024 after Platinum Equity acquired a majority stake, with Kohler Co. retaining an ownership interest. Headquartered in the Milwaukee, Wisconsin area (Kohler, WI), Rehlko operates across North America, EMEA (France, UK, Ireland, Nigeria) and Asia Pacific (Singapore), with manufacturing facilities including a €12 million-expanded site in Cholet, France, and a circular-economy site in Brest, France.

Rehlko's product portfolio spans the KD Series industrial generators (60–600 kW), Command PRO engines for off-road and marine applications, fuel-flexible platforms supporting diesel, gasoline, hybrid, hydrogen, and HVO, and integrated solutions such as the Heila microgrid platform, Conscious Care lifecycle service program, and the Power Impact Intelligence analytics platform with EPD carbon calculator and decarbonization modeler. The company supports its offerings through more than 3,000 global engine dealers, a residential home energy dealer network, and direct enterprise sales via the Clarke Energy subsidiary (30+ years, 10+ GW installed base).

Rehlko sells to hyperscale, colocation, and enterprise data center operators; mission-critical facilities including hospitals, stock exchanges, and airports; residential homeowners in hurricane-prone regions; off-road equipment OEMs; marine operators; and energy utilities. Revenue is generated primarily through hardware sales, custom system design, installation, and maintenance services, with multi-year framework agreements (notably the 1.25 GW INNIO engine agreement) supporting data center and flexible generation demand. The business is positioned around the Structured Transition Model whitepaper, which frames Rehlko's value as enabling simultaneous energy resilience and decarbonization for AI-era digital infrastructure.

Name

Rehlko

Legal name

Rehlko

Website

https://rehlko.com

Company type

Private

Founded year

1920

Operating status

Operating

Headcount range

1,001–5,000 employees

Short description

Rehlko provides energy resilience solutions, including industrial generators, UPS systems, microgrids, hydrogen fuel cells, BESS, and engines, for data centers, mission-critical facilities, residential homeowners, and off-road OEMs globally.

Ownership category

akta.pro rank

Product category

Industrial Power Generation and Energy Resilience Equipment

NAICS

Motor and Generator Manufacturing (335312), Turbine and Turbine Generator Set Units Manufacturing (333611), Electric Power Generation (22111)

SIC

Motors & Generators (3621), Engines & Turbines (3510), Switchgear & Switchboard Apparatus (3613), Cogeneration Services & Small Power Producers (4991)

akta.pro primary industry

Reciprocating Engine Generator Sets (Diesel/Gas/HFO) (IMAHAFAC)

akta.pro secondary industries

Backup Power Generation (Diesel/Natural Gas Generators) (HDABAKAB), Backup & Resilience Power Systems (Standby Generators, Critical Facilities) (EUACALAG), Emergency & Standby Diesel Generator Power (Critical Facilities) (EUACACAH), Engine Generator & Microgrid Power Plant EPC (Diesel/Gas Recip) (EUAEAAAJ), Emergency Generator & Transfer Switch Troubleshooting (HSAOAEAI), Energy Storage Components for Renewables Manufacturing (BESS Packs, PCS, Thermal Management) (EUAMAHAI)

Keywords

• Industrial generator systems
• Uninterruptible power supply
• Energy resilience solutions
• Distributed power generation
• Powertrain engine technologies

Headquarters

HQ city

Milwaukee

HQ country

United States

HQ region

North America

Offices4 records

Markets served

GTM type

B2B and B2C

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Industrial Energy Systems: Engineering, installing, and maintaining critical energy solutions including generators, UPS systems, microgrids, and power control systems for data centers, hospitals, and mission-critical facilities. Revenue from custom system design, equipment sales, installation, and maintenance services.
2. Clarke Energy Distributed Generation: Distributed energy solutions through Clarke Energy subsidiary with over 30 years of experience. Services include development, installation, and maintenance of gas engine-based power solutions globally.
3. Power Control & Distribution: Power solutions designer and original manufacturer providing distribution equipment for safe, efficient electrical infrastructure management.
4. Home Energy Products: Commercial-grade home backup generators through Kohler Home Energy dealer network. Revenue from generator sales and related services for residential customers.
5. Powertrain and Engine Technologies: Diesel, gasoline, hybrid, alternative fuel, and marine engines for off-road vehicles. Revenue from engine sales and genuine Rehlko parts through global dealer network of more than 3,000 dealers.
6. Marine Generators: Quiet and dependable marine power generation solutions for maritime applications.
7. Uninterruptible Power Supply: UPS systems and services protecting critical power systems, available in UK, Ireland, and Singapore markets.
8. Gas Engine Capacity Agreements: Multi-year engine framework agreements (1.25 GW over three years with INNIO Group) supporting data center and flexible generation demand. Significant portion allocated to hyperscale, colocation, and enterprise operators.

Go-to-market motion4 records

Distribution channels7 records

Marketing channels7 records

Core offering

Rehlko manufactures and delivers energy resilience solutions including industrial generators (60-600 kW KD Series), uninterruptible power supply (UPS) systems, complex microgrids, hydrogen fuel cell systems, battery energy storage systems (BESS), and combined heat and power systems for data centers, hospitals, and other mission-critical facilities. The company also produces commercial-grade home standby generators for residential customers, diesel/gasoline/hybrid/alternative-fuel engines for off-road vehicles, marine generators, and power control and distribution equipment, sold through direct enterprise sales, the Clarke Energy subsidiary, and a global network of more than 3,000 dealers.

Product overview

Rehlko is a global energy resilience company with a diversified portfolio of businesses delivering power solutions across industrial, commercial, and residential applications. The company operates through distinct business units including Power Systems (industrial generators and data center power), Clarke Energy (distributed energy and gas engine solutions), Uninterruptible Power (UPS systems), Marine Generators, Power Control & Distribution, KOHLER Generators (home backup power), and Rehlko Engines (powertrain technologies). Core product lines span the KD Series industrial generators (60-600 kW), hydrogen fuel cell systems, battery energy storage systems (BESS), biogas upgrading, and combined heat and power systems. The company supports its products with service programs including Conscious Care™ maintenance and strategic platforms such as Power Impact Intelligence (carbon calculation and decarbonization modeling) and the Structured Transition Model framework. Solutions are delivered to data center operators (hyperscale, colocation, enterprise edge), industrial facilities, and residential homeowners, with sustainability anchored in the Powering Impact™ initiative.

Differentiator

Problem solved

Functional benefit

Brands

• Power Systems: Industrial generators, uninterruptible power systems, complex microgrids, and future-forward solutions for data centers, hospitals, and critical infrastructure
• Clarke Energy
• Uninterruptible Power
• Kohler Home Energy
• Rehlko Engines
• Marine Generators
• Power Control & Distribution
• Conscious Care
• KD Series
• Heila Technologies

Products and services

• Industrial Energy Systems (Power Systems) End-to-end industrial power solutions including industrial generators, uninterruptible power systems, complex microgrids, and future-forward solutions for data centers, hospitals, and other mission-critical facilities.
• KD Series Industrial Generators Industrial generator series delivering dependable backup and prime power in the 60-600 kW range, with HVO fuel compatibility for carbon footprint reduction, targeting mission-critical applications.
• Clarke Energy Distributed Energy Solutions Distributed energy solutions engineering, installation, and maintenance of gas engine-based power generation and combined heat and power systems globally through the Clarke Energy subsidiary, with over 30 years of market presence.
• Uninterruptible Power Supply (UPS) Systems Conditioned, uninterruptible power supply systems for vital systems in data centers, hospitals, stock exchanges, and airports; available in UK, Ireland, and Singapore markets.
• Marine Generators Marine power systems providing quiet and dependable onboard energy for maritime applications, tested and proven for marine environments.
• Power Control & Distribution Equipment Power solutions designed and original manufactured for safe, efficient electrical infrastructure management, including distribution equipment.
• KOHLER Home Energy Standby Generators Commercial-grade home standby generators ensuring homes never lose power when the grid goes down, positioned for homeowners in hurricane-prone and outage-vulnerable regions.
• Rehlko Engines (Command PRO Engine Family) Diesel, gasoline, hybrid, alternative fuel, and marine engines for off-road vehicles and industrial equipment, backed by a network of more than 3,000 dealers worldwide.
• Hydrogen Fuel Cell Systems Fully optimized and integrated hydrogen fuel cell systems suitable for prime energy, peak shaving, and emergency backup power, converting hydrogen to electricity with water vapor as the primary by-product.
• Battery Energy Storage System (BESS) Energy storage solutions helping data center customers manage variable utility rate structures, load spikes with high-demand charges, and grid instability by balancing energy supply and demand behind-the-meter or as part of a hybrid system.
• Biogas Upgrading Systems Tailored systems that clean biogas into concentrated streams of renewable natural gas (RNG) and bioCO2 for defossilizing gas grids and sustainable transportation fuel.
• Combined Heat and Power (CCHP) Systems Combined heat, power, and cooling systems anchored in gas engines that produce electricity, heat, and cooling, doubling generation efficiency and reducing CO2 emissions per useful kW.
• Conscious Care Lifecycle Maintenance Program Advanced lifecycle care and maintenance program for KD Series generators that reduces costs and up to 71% of testing emissions using existing infrastructure, supporting the EPD carbon calculator for lifecycle carbon impact.
• Power Impact Intelligence Platform Strategic platform delivering decision-ready insight into the carbon impact of power systems, including an EPD carbon calculator and a decarbonization modeler with regionally informed guidance for data center operators.
• Data Center Solutions Comprehensive energy solutions for data centers including power generation, energy storage, microgrids, and renewable energy technologies serving hyperscale, colocation, and enterprise edge operators from one partner, end to end.

Quantifiable outcome

• 19.6% reduction in Scope 1 and 2 greenhouse gas emissions since 2023
• +10 more outcomes

Named customers8 records

Segments6 records

Ideal customer profiles6 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability3 records

Feature10 records

Partnerships

Ten partnerships are on record, tiered core and supporting.

• Toyota Motor North AmericacoreStrategic or Co-development Partner · 16 June 2026Collaboration on lower-emission generators featured on Bloomberg Television's 'Earth with John Holden' program. Toyota's Environmental Challenge 2050 strategy includes solar energy investments and collaborations with Rehlko on lower-emission generators and Savion on virtual power purchase agreements. Rehlko supports Toyota's multi-pathway mobility approach encompassing battery electric vehicles, hydrogen fuel cell vehicles, and hybrid vehicles.
• Liebherr GroupcoreStrategic or Co-development Partner · 2 June 2026Strategic partnership for capacity expansion with ceremony at Liebherr-Components facility in Colmar, France. Marks key milestone in continued expansion of partnership and significant step in scaling resilient power solutions for next generation of digital infrastructure. Rehlko participates in strategic capacity expansion ceremonies with Liebherr-Components.
• INNIO GroupcoreTechnology or Integration · 9 April 2026Multi-year strategic engine framework agreement securing approximately 1.25 GW of gas engine capacity over three years to support accelerating demand from data centers and flexible generation projects. Delivered through Clarke Energy subsidiary which has over 30 years of partnership with INNIO supporting more than 10 GW of global installed base. Significant portion allocated to hyperscale, colocation, and enterprise data-center operators. Provides long-term supply certainty during unprecedented investment in digital infrastructure.
• TurfMutt FoundationsupportingGTM or Marketing Partner · 1 January 2024TurfMutt Foundation provided $1 million sponsorship of the Great Lawn at Waterfront Park in Louisville, Kentucky in 2024. Enables Rehlko's 'Cutting History' initiative including Guinness World Records title attempt for fastest mowing of an American football field-sized area, powered by Rehlko's Command PRO 999 cc gasoline engine.
• Savion (Virtual Power Purchase Agreements)supportingTechnology or IntegrationPart of Toyota's sustainability collaboration ecosystem. Savion provides virtual power purchase agreement services supporting Toyota's Environmental Challenge 2050 and decarbonization goals.
• iMasons (Infrastructure Masons)coreStrategic or Co-development PartnerRehlko holds leadership roles in iMasons Climate Accord working groups and contributes to industry frameworks and reports advancing practical solutions to decarbonize digital infrastructure. Working alongside global partners across equipment, materials, power, and water to turn collaboration into measurable climate progress.
• Heila TechnologiessupportingTechnology or IntegrationHeila, a Rehlko company, provides standardized microgrid solutions simplifying implementation and optimizing distributed energy resources through an integrated platform with standardized approach to microgrids.
• UL SolutionssupportingOthersThird-party assurance provider for key environmental, safety, and resource metrics. UL Solutions provides GHG verification ensuring transparency and credibility in Rehlko's sustainability reporting.
• WB Power Services (Now Rehlko UK)coreChannel Partner/ Reseller/ DistributorWB Power Services fully brought onto Rehlko platform, strengthening UK and EMEA operating model and expanding ability to deliver end-to-end lifecycle solutions for mission-critical power applications.
• Parker HannifinsupportingOthersParker Hannifin agreed to acquire Curtis Instruments from Rehlko for approximately $1 billion, with transaction expected to close by end of 2025. Allows Rehlko to focus on core energy resilience solutions while Parker leverages Curtis's technologies to support electrification trends.

Scale indicators15 records

Recent moves10 records

Expansion highlights6 records

Direct peers

• Vertiv: Vertiv is a direct competitor in data center power infrastructure, including UPS systems, power distribution, and thermal management. Rob Johnson (former CEO of Vertiv) is a Rehlko board member, signaling the strategic overlap. Vertiv's UPS and switchgear products compete directly with Rehlko's Uninterruptible Power and Power Control & Distribution subsidiaries.
• Wartsila: Wartsila is a direct competitor in large gas engine distributed generation and grid balancing, with similar CHP and flexible generation offerings. Wartsila's Engines and Energy Storage business is highly comparable to Rehlko's Clarke Energy plus BESS combination for data center and utility customers.
• Aggreko: Aggreko is a direct competitor in distributed and temporary power generation, including gas and diesel rentals for data centers and industrial customers. Aggreko's modular power and BESS offerings overlap with Rehlko's Clarke Energy distributed generation and microgrid solutions.
• Generac: Generac is the most direct competitor in industrial and home backup generators, with a comparable product line across residential standby, commercial-industrial generators, and clean energy storage. Russ Minick, former President of Energy Technology at Generac, advises Rehlko, signaling the direct overlap in market positioning and competitive rivalry.
• Rolls-Royce Power Systems (MTU): Rolls-Royce Power Systems through the MTU brand competes directly in reciprocating engine generator sets for data centers, hospitals, and mission-critical facilities. MTU's mtu EnergyPack BESS and microgrid solutions overlap with Rehlko's KD Series and Power Impact Intelligence offering.

Broad incumbents

• Schneider Electric: Schneider Electric is a broad incumbent in data center power infrastructure, UPS, and electrical distribution. Jan van Dokkum (former CEO of Siemens Power Transmission & Distribution, advisor to Rehlko) previously held roles adjacent to this competitive set, and Schneider's Galaxy and Easy UPS series compete with Rehlko UPS offerings.
• Cummins: Cummins is a broad incumbent in reciprocating engines, power generation, and increasingly battery/fuel cell technology through its Accelera segment. It competes with Rehlko/Clarke Energy in gas engine distributed generation and competes with Power Systems in industrial generator sales to data centers and mission-critical facilities.
• ABB: ABB is a broad incumbent in power infrastructure, including switchgear, UPS, and increasingly microgrid and battery energy storage solutions. ABB competes with Rehlko's Power Control & Distribution subsidiary and overlaps with Rehlko's BESS and hydrogen fuel cell offerings for data center resilience.
• Caterpillar: Caterpillar is a broad incumbent in engines and power generation through its CAT Electric Power division, serving data centers, hospitals, and industrial customers with reciprocating generator sets and turbine solutions. Rehlko's KD Series, marine generators, and Clarke Energy gas engines directly compete with Caterpillar's portfolio.
• Eaton: Eaton is a broad incumbent in power distribution, switchgear, and UPS systems for data centers and industrial facilities. Eaton competes with Rehlko's Power Control & Distribution subsidiary and Uninterruptible Power unit, particularly in electrical infrastructure for mission-critical facilities.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

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Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles20 records

Subsidiaries9 records

Funding overview

Funding rounds

Investors

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

M&A

Investments

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

Frequently asked questions about Rehlko