What Power Solutions International does

Power Solutions International (PSI), founded in 1980 and headquartered in Wood Dale, Illinois, is a public manufacturer (NASDAQ: PSIX) of engines and power systems serving industrial OEMs across North America. The company designs, develops, manufactures, and distributes a comprehensive engine portfolio spanning displacements from 0.97 liters to 88 liters, operating on natural gas, propane, gasoline, diesel, biofuels, and HVO renewable diesel. Product lines are organized into three core categories: Power Systems (heavy-duty 8.1L-88L engines and custom enclosures for stationary power generation up to 3,300 kWe), Industrial Engines (1.0L-8.8L spark-ignited engines for OEM integration), and Transportation Engines (EPA/CARB-certified engines for vocational trucks, terminal tractors, and buses). Recent additions include HD Hyundai Infracore Tier 4/Euro Stage V diesel engines, a Lithium-Ion Power Unit for industrial electrification, and a telematics offering branded Mastertrak.

PSI's business model is primarily hardware sales to industrial OEMs under direct enterprise sales agreements, with a quote-based pricing model reflecting custom configurations by application, fuel type, power rating, and certification level. The company sells turn-key power units and integration services alongside bare engines, and supports installed equipment through parts, manuals, software downloads, and a customer support portal. Revenue is generated across four primary verticals: Industrial OEMs (core), Data Center Power Solutions (vertical integration play via the March 2026 MTL Manufacturing acquisition), Transportation (terminal tractors, vocational trucks), and Stationary Power Generation (emergency, wastewater, oil and gas, healthcare). Named customers include Morbark, Bandit, Dyna Products, MAFI Transport-Systeme, Amarillo Wind Machine, Husker Power Products, Mack Trucks, Capacity of Texas, and Taylor Machine Works.

PSI is majority-owned by Weichai America Corp., a strategic shareholder that has provided over $160 million in cumulative shareholder loans since 2021, alongside a $120 million senior secured revolving credit facility with Standard Chartered Bank. The company has manufacturing operations at Wood Dale, Illinois (headquarters) and Beloit, Wisconsin (enclosures, plus the acquired MTL Manufacturing facility), with engineering/R&D in Burr Ridge, Illinois. Q1 2026 net sales were $128.6 million, a 5% year-over-year decline, and management revised full-year 2025 sales growth guidance down to 45% from prior 74% and 62% outlooks. The company is exposed to multiple securities class action lawsuits filed in 2026 alleging material misstatements regarding data center market demand and manufacturing costs.

Name

Power Solutions International

Legal name

Power Solutions International, Inc.

Website

https://psiengines.com

Company type

Public

Founded year

1980

Operating status

Operating

Headcount range

251–500 employees

Short description

Power Solutions International (NASDAQ: PSIX) manufactures fuel-flexible engines and power systems spanning 0.97L to 88L displacements for industrial OEMs across power generation, transportation, data center, and stationary power applications in North America. The Wood Dale, Illinois-based company is majority-owned by Weichai America and sells turn-key power units under direct enterprise agreements.

Ownership category

akta.pro rank

Product category

Industrial Engines

NAICS

Engine, Turbine, and Power Transmission Equipment Manufacturing (3336), Turbine and Turbine Generator Set Units Manufacturing (333611), Other Engine Equipment Manufacturing (333618), Motor and Generator Manufacturing (335312)

SIC

Engines & Turbines (3510), Motors & Generators (3621)

akta.pro primary industry

Diesel Engine Power Plants (Medium/High-Speed Reciprocating) (EUACACAB)

akta.pro secondary industry

Hybrid Powertrain Integration Manufacturing (ICE-HEV/PHEV modules) (IMACAHAJ)

Keywords

• Industrial engines
• Power generation systems
• Fuel-flexible engines
• Custom enclosures
• OEM powertrain solutions

Headquarters

HQ city

Wood Dale

HQ country

United States

HQ region

North America

Offices4 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Engine and Power Systems Sales: PSI designs, develops, manufactures, and sells engines and power systems to industrial OEMs. The company offers heavy-duty engines and custom enclosures for power generation applications, with engine displacements ranging from under 1 liter to 88 liters. Revenue is generated through direct sales to OEMs for incorporation into their equipment.
2. Power Systems Integration: The company provides integration services and turn-key power units to customers, including custom-designed enclosures for power generation products. This adds value through engineering services and custom manufacturing.
3. Parts and Service: PSI offers parts and dedicated service to keep customer equipment running optimally, including software downloads, manuals, and support portal access.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels5 records

Core offering

Power Solutions International designs, manufactures, and distributes fuel-flexible engines and power systems (displacements from 0.97L to 88L) to industrial OEMs, supporting natural gas, propane, gasoline, diesel, and biofuel operation. The company also provides custom enclosures, integration services, and turn-key power units for power generation, industrial, and transportation applications, and recently added Lithium-Ion battery power units and Tier 4/Euro Stage V diesel engines via its HD Hyundai Infracore partnership.

Product overview

Power Solutions International (PSI) is a manufacturer and servicer of power systems and engines for industrial, power generation, and transportation applications. The company operates as a single unified product portfolio organized into three core product lines: Power Systems (heavy-duty engines and custom enclosures for power generation), Industrial Engines (1.0L to 8.8L spark-ignited engines), and Transportation Engines. The product lineup spans engine displacements from 1 liter to 88 liters running on gasoline, propane, natural gas, diesel, and biofuels. PSI recently expanded through the HD Hyundai Infracore partnership adding EPA Tier 4/Euro Stage V diesel engines (DM and DX series), acquired MTL Manufacturing for metal fabrications and enclosures serving the data center market, and introduced Lithium-Ion Power Units for electrified applications. Custom enclosures and fabricated metal products (switchgear subbases, electrical enclosures, fuel tanks) are manufactured at the company's Wisconsin facilities.

Differentiator

Problem solved

Functional benefit

Brands

• Mastertrak: Product brand mentioned in navigation menu under solutions

Products and services

• Power Systems Product Line Heavy-duty engines (8.1L to 88L natural gas and diesel) and custom enclosures designed to deliver robust power generation solutions for industrial OEMs, with power range from 500 to 3,300 kWe.
• Industrial Engines High-performance spark-ignited engines for OEMs of heavy industrial equipment (off-road and on-road applications), with displacements from 1.0L to 8.8L running on gasoline, propane, and natural gas fuels.
• Transportation Engines Engine solutions for transportation applications including terminal tractors, vocational trucks, and buses, with EPA and CARB certified engines for mobile applications.
• HD Hyundai Infracore Diesel Engines (DM Series) Tier 4 and Euro Stage V compliant diesel engines (DM01 1.8L, DM02 2.4L, DM03 3.4L) for industrial applications, marketed and distributed in North America through PSI's partnership with HD Hyundai Infracore.
• HD Hyundai Infracore Diesel Engines (DX Series) Larger Tier 4 and Euro Stage V compliant diesel engines (DX05 5.0L, DX08 7.5L) for industrial applications, with common block solutions for multiple fuel types including LPG, Diesel, Gasoline, and Natural Gas.
• 88 Liter Diesel Engine Large displacement 87.5L diesel engine for power generation with power ratings up to 3,300 kWe at 60Hz (1800 RPM), featuring cast iron construction and high-pressure common rail fuel system.
• 8.8 Liter Propane Engine EPA and CARB certified 8.8L propane engine delivering 245.4 hp and 515.5 lb-ft of torque, certified for mobile off-road applications and used to power terminal tractors such as those manufactured by MAFI Transport-Systeme.
• Lithium-Ion Power Unit Electric power unit featuring an electric motor powered by Lithium-Ion batteries for industrial applications including woodchippers and other high-volume OEM equipment, with integrated controller, color display, and iBMS battery management software; patent pending.
• Custom Enclosures Complete custom-designed enclosures for the power generation product line, manufactured at the Beloit, Wisconsin facility to protect and house power generation equipment.
• MTL Manufacturing Metal/Steel Fabrications Fabricated metal products including switchgear subbases, electrical enclosure assemblies, and fuel tanks for data center applications, produced at the 185,000 square foot Beloit, Wisconsin facility under UL142, ULC S601, and UL2085 certifications.
• Mastertrak Telematics Telematics and tracking solution for fleet management and remote monitoring of PSI power systems and engines.

Quantifiable outcome

• Over 1.5 million engines sold over 40+ years of operation
• +2 more outcomes

Named customers8 records

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Three partnerships are on record, tiered core, major and minor.

• MTL Manufacturing & Equipment Inc.coreStrategic or Co-development Partner · 2 March 2026PSI acquired MTL Manufacturing, a metal and steel manufacturing company based in Beloit, Wisconsin. The acquisition provides PSI with vertical integration in the data center market, improved supply chain control, reduced lead times, and access to specialized production capabilities including UL certifications (UL142, ULC S601, UL2085) across its 185,000 square foot facility.
• HD Hyundai Infracore (HDI)majorStrategic or Co-development Partner · 27 August 2025Cooperative agreement adds HD Hyundai Infracore's Tier 4 and Euro Stage V diesel engines to PSI's industrial offerings in North America. PSI markets, develops, and distributes HDI's diesel engine offerings and provides customers with integration services and turn-key power units. The agreement also includes gasification development of certain HDI diesel engines for multiple fuel types.
• Propane Education and Research Council (PERC)minorGTM or Marketing PartnerPSI displayed its 13-liter propane engine in conjunction with PERC at PowerGen convention. PERC recognized PSI and MAFI for propane-powered terminal tractors with Energy for Everyone Hero Award. Collaborative efforts to promote safe, efficient use of propane gas through education and technological advancements.

Scale indicators7 records

Recent moves7 records

Expansion highlights6 records

Broad incumbents

• Cummins Inc. Global leader in diesel and natural gas engine manufacturing for industrial, power generation, and on-highway applications. Directly comparable to PSI as a multi-fuel engine OEM serving the same industrial OEM and power generation customer base, but with substantially greater scale and a broader product portfolio.
• Caterpillar Inc. Manufactures Cat-branded diesel and gas engines for industrial, power generation, and machine applications through its Cat Industrial Power Systems division. Overlaps with PSI's industrial engine and stationary power generation offerings, with far larger scale, distribution, and brand recognition.
• MAN Energy Solutions: Produces large-bore diesel and gas engines for marine, power generation, and industrial applications including large stationary power plants. Overlaps with PSI's larger-displacement power generation engines (20L-88L) and serves the same utility and industrial power customers.

Direct peers

• Generac Holdings: Leading manufacturer of power generation equipment including stationary, portable, and industrial generators, with a growing presence in data center backup power. Comparable to PSI's stationary power generation and data center solutions, with overlapping end markets and similar fuel-flexible engine integration strategy.
• Deutz AG: German manufacturer of innovative drive systems and engines for off-highway applications, with growing focus on electrified and hybrid powertrains. Closely comparable to PSI's industrial engine portfolio and emerging Lithium-Ion Power Unit strategy for industrial OEMs.
• Westport Fuel Systems: Specializes in alternative fuel engines and fuel systems, particularly natural gas and hydrogen, for transportation and industrial applications. Directly comparable to PSI's fuel-flexible engine strategy and HVO / alternative fuel positioning.
• FPT Industrial (Iveco Group): Global engine manufacturer focused on industrial, marine, power generation, and on-road applications, with multi-fuel capability including natural gas, diesel, and hybrids. Comparable to PSI as an engine OEM selling to industrial OEMs and power generation customers, with similar product breadth and geographic reach.
• Kohler Co. (Power Systems): Manufactures industrial generators and power systems for backup, prime, and continuous power applications including data center deployments. Comparable to PSI's power systems business, especially the data center vertical, with integrated engine and enclosure offerings.
• Briggs & Stratton: Manufactures small-to-medium displacement gasoline and alternative fuel engines for industrial, commercial, and consumer applications. Comparable to PSI's smaller-displacement industrial engines and the new Lithium-Ion Power Unit strategy for off-road equipment OEMs.

Emerging players

• Cummins-Onan: Cummins-branded small-to-medium power generation systems used in RVs, commercial mobile, marine, and light commercial applications. Partially overlaps with PSI's stationary power generation portfolio at the smaller end of the displacement range and shares the same OEM channels.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks7 records

Key highlights6 records

Customer concentration

• Xx.com/PowerSolutionsI
• Facebookfacebook.com/PSIEnginesOfficial
• LinkedInlinkedin.com/company/power-solutions-international

Compliance8 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Subsidiaries1 record

Funding overview

Funding rounds8 records

Investors1 record

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

M&A2 records

Investments

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

Frequently asked questions about Power Solutions International