Rehlko

What Rehlko does

Rehlko (legal entity Discovery Energy, LLC) is a global energy resilience company headquartered in Glendale, Wisconsin, operating as the former Kohler Co. energy division under majority ownership of Platinum Equity since May 2024. The company designs, manufactures, and services industrial power systems spanning diesel, natural gas, HVO, hydrogen fuel cells, and battery energy storage, organized into three business segments: Industrial Energy Systems (generators, uninterruptible power systems, and complex microgrids for data centers, hospitals, and critical infrastructure), Powertrain Technologies (combustion and hybrid engines for OEM customers from 5 hp to higher ratings, produced at Aurangabad, India and an Italian facility), and Home Energy (commercial-grade KOHLER-branded residential standby generators).

Core products include the KD Series generators (60-600 kW), 1 MW Toyota hydrogen fuel cell generators, INNIO-sourced gas engines (1.25 GW capacity reserved under a multi-year framework), and the Command PRO engine line. Supporting software and platforms include Clarke Energy (an in-house engineering and lifecycle solutions platform supporting a 10+ GW global installed base), the Power Impact Intelligence platform, and the Structured Transition Model for decarbonization planning. The company sells primarily through direct enterprise field sales and long-term contracted maintenance, with residential products distributed through retail channels in hurricane-prone geographies. Notable recent commercial validation includes 1.7 GW of hyperscale data center backup power awards secured within a 60-day window in 2026, and partnerships with Liebherr (decade-long engine supply), Toyota (hydrogen fuel cells), and INNIO (gas engines).

Name

Rehlko

Legal name

Discovery Energy, LLC dba Rehlko

Website

https://kohlerenergy.com

Company type

Private

Founded year

2024

Operating status

Operating

Headcount range

5,001–10,000 employees

Short description

Rehlko is a global energy resilience company that designs, manufactures, and services industrial power generation systems, microgrids, and residential backup generators, primarily serving hyperscale data centers, healthcare facilities, industrial sites, and homeowners through direct enterprise sales, retail channels, and its Clarke Energy lifecycle platform.

Ownership category

akta.pro rank

Product category

Power Generation Equipment

NAICS

Turbine and Turbine Generator Set Units Manufacturing (333611), Engine, Turbine, and Power Transmission Equipment Manufacturing (3336), Electric Power Generation (22111), Fossil Fuel Electric Power Generation (221112), Relay and Industrial Control Manufacturing (335314)

SIC

Motors & Generators (3621), Engines & Turbines (3510), Cogeneration Services & Small Power Producers (4991), Electronic & Other Electrical Equipment (No Computer Equip) (3600), Industrial Instruments For Measurement, Display, And Control (3823)

akta.pro primary industry

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

akta.pro secondary industries

Backup Power Generation (Diesel/Natural Gas Generators) (HDABAKAB), Engine Generator & Microgrid Power Plant EPC (Diesel/Gas Recip) (EUAEAAAJ), Dispatchable Distributed Generation (Gas Reciprocating Engines, Microturbines) (EUACALAI), Fuel Cell Distributed Generation (Hydrogen/Natural Gas SOFC/PEM) (EUACALAK), Renewable Monitoring, Controls & SCADA Hardware Manufacturing (Sensors, RTUs, Meters) (EUAMAHAJ)

Keywords

• Power generation systems
• Backup generators
• Industrial energy systems
• Microgrid solutions
• Natural gas engines

Headquarters

HQ city

Kohler

HQ country

United States

HQ region

North America

Offices5 records

Markets served

GTM type

B2B and B2C

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Industrial Energy Systems: Sale of industrial generators, uninterruptible power systems, and complex microgrids for data centers, hospitals, and industrial facilities. Revenue from large-scale infrastructure projects with long-term contracted maintenance.
2. Engine Sales (Powertrain Technologies): Sale of engines ranging from 5-25 hp to higher-rated industrial engines for various applications including construction equipment, agricultural machinery, and marine use.
3. Data Center Power Solutions: Comprehensive power solutions for hyperscale, colocation, enterprise and Edge data center operators including backup, continuous, and uninterruptible power systems. Growing segment with 1.7 GW of recent backup power awards.
4. Home Energy Products: Commercial-grade home backup generators under KOHLER brand ensuring residential power resilience during grid outages.
5. Professional Services: Long-term contracted maintenance and lifecycle solutions through Clarke Energy platform, providing ongoing service revenue from installed base.

Pricing tiers

Go-to-market motion3 records

Distribution channels4 records

Marketing channels6 records

Core offering

Rehlko manufactures and sells industrial power generation systems, uninterruptible power supplies, and microgrids for data centers, hospitals, and industrial facilities. It also produces engines for OEM powertrain applications under the Command PRO brand, and commercial-grade home standby generators for residential consumers. The company provides lifecycle and engineering services through its Clarke Energy platform, supporting a global installed base of more than 10 GW of gas engine capacity.

Product overview

Rehlko is a global energy resilience company offering a comprehensive portfolio of power solutions across three main business segments: Industrial Energy Systems (generators, uninterruptible power systems, and microgrids for data centers and hospitals), Powertrain Technologies (combustion and hybrid engines), and Home Energy (residential standby generators). The company's data center solutions span from 60 kW to 1 MW+ across diesel, natural gas, HVO, and hydrogen fuel cell technologies. Core products include the KD Series generators (60-600 kW), Command PRO engines, 1 MW hydrogen fuel cell generators (powered by Toyota fuel cell modules), and INNIO gas engines (1.25 GW capacity). Supporting platforms include Clarke Energy (in-house engineering and lifecycle solutions), Power Impact Intelligence platform, and the Structured Transition Model. The company serves hyperscale, colocation, enterprise, and edge data center operators as well as residential and industrial markets.

Differentiator

Problem solved

Functional benefit

Brands

• Kohler Power Systems: Power generation and energy systems for industrial applications
• Kohler Home Energy
• Kohler Engines
• Clarke Energy
• KD Series
• Command PRO
• Power Impact Intelligence
• Structured Transition Model

Products and services

• KD Series Generators Diesel-powered modular backup generator solutions with power output of 60-600 kW designed for rapid deployment and reliability for hyperscale data centers and mission-critical facilities.
• KOHLER Home Standby Generators Commercial-grade home backup generators that ensure continuous power during grid outages, distributed for residential use in hurricane-prone regions and areas with aging grid infrastructure.
• Command PRO Engines Robust gasoline and diesel engines for OEM powertrain applications including the Command PRO EFI ECH941 (highest power in displacement class), KSD 1403TCA, KDI 1903TCR (50kW, 250Nm torque), and engines ranging from 5-25 hp.
• 1 MW Hydrogen Fuel Cell Generators Stationary power generators powered by Toyota hydrogen fuel cell modules producing zero carbon emissions at point of use for mission-critical facilities including hospitals and data centers.
• Adaptive Hybrid Power Systems Hybrid power systems combining diesel, natural gas, HVO, hydrogen fuel cells, and battery energy storage designed for sustained, continuous high-density operation required by AI-scale data centers.
• Membrane-Based Biogas Upgrader Biogas upgrading system that converts municipal biogas into high-purity biomethane, supporting India's SATAT bio-CNG initiative.
• Clarke Energy Engineering and Lifecycle Services In-house engineering and lifecycle solutions platform with over 30 years of partnership with INNIO, supporting global installed base of over 10 GW of gas engine capacity. Delivers scalable hybrid power solutions with long-term contracted maintenance.
• INNIO Gas Engines Natural gas engine systems with approximately 1.25 GW of capacity secured via multi-year framework agreement with INNIO Group for flexible power generation supporting data center operations and grid resilience.
• Hydrogen Fuel Cell Hospital Backup System Hydrogen fuel cell backup power installation delivering zero-emission, resilient backup power for healthcare facilities as alternative to diesel generators.

Quantifiable outcome

• 19.6% reduction in Scope 1 and 2 greenhouse gas emissions compared to 2023 baseline (2025)
• +4 more outcomes

Named customers5 records

Segments6 records

Ideal customer profiles5 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature8 records

Partnerships

Six partnerships are on record, tiered core, minor and strategic.

• LiebherrcoreStrategic or Co-development Partner · 2 June 2026Decade-long partnership to scale resilient power solutions for digital infrastructure. Strategic capacity expansion ceremony held June 2 at Liebherr-Components facility in Colmar, France. The 12,000 square meter expansion will more than double production capacity for engines used in high-performance generator sets serving the data center market. Collaboration began with KD Series generator range in 2016 and was further expanded in May 2025.
• SavionminorGTM or Marketing Partner · 1 June 2026Partnership for virtual power purchase agreements supporting renewable energy projects as part of Toyota's Environmental Challenge 2050 strategy.
• INNIO GroupcoreStrategic or Co-development Partner · 9 April 2026Multi-year strategic engine framework agreement securing approximately 1.25 GW of gas engine capacity over three years. Expands Rehlko's existing firm reservation of 700 MW. Addresses accelerating demand from data centers and flexible generation projects across global markets. Significant portion allocated to hyperscale, colocation, and enterprise data center operators. Rehlko delivers projects through Clarke Energy platform with over 30 years of partnership with INNIO.
• Parker HannifinstrategicOthers · 1 September 2025Rehlko sold its Curtis Instruments business to Parker Hannifin for approximately $1 billion, with transaction expected to close by end of 2025. Sale aligns with Rehlko's strategic focus on core energy resilience solutions.
• The Wilmott GroupstrategicStrategic or Co-development Partner · 10 July 2025UK-based manufacturer of back-up power solutions that Rehlko plans to acquire to expand presence in European data center market and other critical infrastructure sectors.
• Toyota Hydrogen SolutionscoreStrategic or Co-development Partner · 1 May 2025Supplier agreement announced at Advanced Clean Transportation Expo where Toyota provides hydrogen-powered fuel cell modules for Rehlko's stationary power generators. Collaboration includes development of 1MW fuel cell generator to enhance energy resilience for mission-critical facilities. Toyota fuel cells received ANSI/CSA FC 1 and FC 6 certifications for stationary power generator applications in North America.

Scale indicators8 records

Recent moves9 records

Expansion highlights6 records

Broad incumbents

• Caterpillar: Global heavy equipment OEM with a substantial Electric Power division selling diesel and gas generator sets for data centers, hospitals, and industrial customers; a broad incumbent whose generator portfolio directly competes with Rehlko's KD Series and INNIO gas engines across similar use cases.
• Cummins: Manufacturer of diesel and natural gas generator sets, power generation systems, and components serving data centers, healthcare, and commercial/industrial markets; one of the most directly comparable peers to Rehlko's industrial energy systems and engine portfolio.
• Rolls-Royce Power Systems (mtu): Large incumbent supplying mtu diesel and gas generator sets for data centers, mission-critical, and industrial applications; competes directly with Rehlko in the hyperscale and microgrid segments across Europe and North America.
• Wärtsilä: Finnish broad incumbent producing large gas and dual-fuel engine generator sets and energy storage solutions for data centers, grid balancing, and industrial customers; competes in flexible generation markets where Rehlko and Clarke Energy operate.
• Eaton: Power management company supplying UPS systems, switchgear, and industrial controls; competes with Rehlko's UPS subsidiary and power electronics broadly across the data center and industrial customer base.

Direct peers

• Generac Holdings: Leading US manufacturer of backup power generators for residential, commercial, and industrial customers with a strong data center power play; directly competes with KOHLER Home Energy on residential standby generators and increasingly on data center solutions.
• INNIO Group (Jenbacher): Manufacturer of Jenbacher gas engines used in distributed power generation, cogeneration, and data center applications; both a strategic supplier to Rehlko (via 1.25 GW framework) and a direct competitor in the engine-driven distributed generation market.
• Vertiv Holdings: Critical digital infrastructure provider offering UPS, power management, and thermal solutions for data centers; Rehlko's UPS subsidiary and data center backup power portfolio overlap with Vertiv's mission-critical power business.
• Aggreko: Global provider of temporary and modular power solutions including diesel and natural gas generator rentals and hybrid BESS for data centers and events; comparable to Rehlko's modular backup power offerings and flexible generation positioning.

Emerging players

• Bloom Energy: Solid oxide fuel cell manufacturer targeting stationary power for data centers and commercial customers; competes with Rehlko's Toyota hydrogen fuel cell platform in the emerging zero-emission backup power segment.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/channel/UC2iCsEGEaaPRAFOWVVKlG0g
• Facebookfacebook.com/rehlko
• LinkedInlinkedin.com/company/kohler-energy
• Instagraminstagram.com/lifeatrehlko
• Xx.com/Rehlko_Global

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries5 records

Funding overview

Funding rounds

Investors

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 Rehlko