What Simplex does

Simplex, Inc. is a U.S.-based designer and manufacturer of industrial load banks and integrated fuel supply systems, headquartered in Springfield, Illinois, with a rental division in Houston, Texas. Founded in 1934, the company serves mission-critical power and liquid-automation requirements across manufacturing, data centers, healthcare, U.S. military, transportation, education, and public-utility end markets. Its load-bank portfolio spans 500W to 5MW+ in single units (networkable to effectively unlimited capacity), covering small portable, large portable, stationary, trailer-mounted, radiator air-cooled, water-cooled, and modular system configurations, plus a fuel-supply line that includes mission-critical fuel management (Triton), day tanks (STS Series), filtration, pump sets, and alarm/control panels.

The company's technology foundation rests on proprietary Powr-Web chromium alloy open-wire continuously supported resistor elements, PLC-based digital control with 8-inch touchscreen HMI, MODBUS over RS-485/TCP-IP, integrated digital power transducers with USB-exportable data acquisition, and 50kW branch-circuit fuse protection. Products carry UL listings (File E151624, UL 508A, UL/CUL) and are positioned for NFPA 110, NFPA 99, and NFPA 70 compliance testing of emergency standby systems. Certifications include DOT-compliant trailer builds.

Commercially, Simplex operates a direct-manufacturer model: quote-based pricing, a nationwide U.S./Canada sales-representative network, a Build-to-Rent rental fleet for custom or temporary needs, and recurring revenue through parts, service, and the Guardian extended warranty program. In 2025, the company was acquired by TerraVest Industries Inc. (TSX: TVE) alongside Tankcon, LBT, and EnTrans, becoming a wholly-owned operating subsidiary within TerraVest's diversified industrial platform that delivered 74% year-over-year consolidated revenue growth in Q1 FY2026.

Name

Simplex

Legal name

Simplex, Inc.

Website

https://simplexdirect.com

Company type

Private

Founded year

1934

Operating status

Operating

Headcount range

101–250 employees

Short description

Simplex, founded 1934 and now a TerraVest Industries subsidiary, designs and manufactures industrial load banks (500W to 5MW+) and integrated fuel supply systems for mission-critical power applications, serving data centers, healthcare facilities, U.S. military, utilities, and manufacturers across North America.

Ownership category

akta.pro rank

Product category

Industrial Load Banks and Fuel Supply Systems

NAICS

Electrical Equipment Manufacturing (3353)

SIC

General Industrial Machinery & Equipment (3560), Industrial Instruments For Measurement, Display, And Control (3823)

akta.pro primary industry

Backup Power & Critical Power Systems (Generators/UPS) (IMAIABAJ)

akta.pro secondary industries

Industrial Power & Energy Equipment Rental/Leasing (Generators, Light Towers, Compressors) (TLABAFAG), Construction & Industrial Equipment Rental/Leasing (Earthmoving, Material Handling, Aerial) (TLABAHAF)

Keywords

• Load bank manufacturing
• Fuel supply systems
• Power generation testing
• Mission critical power equipment
• Resistive reactive load banks

Headquarters

HQ city

Springfield

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Equipment Sales: Sale of load banks (500W to 5MW+ capacity) and fuel supply systems including stationary, portable, trailer-mounted, and custom configurations. Products include resistive, inductive, and reactive load banks.
2. Equipment Rentals: Rental division offering load banks and transformers for temporary testing needs. Simplex can Build-to-Rent customized solutions not available in their large rental fleet.
3. Parts and Service: Replacement parts, field service, and maintenance services. Contact via 800-637-8603 (24 hours). Factory certified used equipment also available.
4. Extended Warranty (Guardian): Long-term direct service through Guardian extended warranty plan providing 24x7x365 coverage.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels4 records

Core offering

Simplex designs and manufactures industrial load banks (500W to 5MW+ capacity, AC to 15kV, DC to 2400V) and integrated fuel supply systems (day tanks, fuel management, leak detection, filtration) for testing and operating backup power generation equipment. The company sells resistive, inductive, and reactive load banks in stationary, portable, trailer-mounted, water-cooled, and radiator-cooled configurations, along with PLC-based digital control systems, to enterprise and government customers in data centers, hospitals, military, utilities, and industrial facilities. A rental fleet and a Build-to-Rent custom manufacturing capability supplement direct equipment sales, complemented by Guardian extended warranty service coverage.

Product overview

Simplex is a manufacturer of industrial load banks and fuel supply systems. The product portfolio consists of two main categories: (1) Load Banks ranging from 500W to 5MW+, including Small Portable (Swift-e, Watt-Muncher, PowerStar, Infinity, MicroStar, Polaris), Large Portable (dynaMITE, Electra, Atlas-Megawatt, Load Cube, Merlin), Stationary (Neptune, Mars, Saturn, Titan, Trident), Trailer (Trident, Neptune, Atlas-Megawatt, dynaMITE), Radiator Airflow Cooled (Vector, LBD), Water Cooled (Nautilus, LBW), and Load Bank Systems (Vulcan-5, Solar-5); and (2) Fuel Supply Systems including Mission Critical systems (Triton integrated fuel management), Filtration Systems (SmartFilter), Fuel Day Tanks (STS Series), Tank Filling Systems (Automatic FuelPort, Compact FuelPort, SmartPump, TC8), Fuel Pump Sets (Packaged, Skid Mounted), and Control & Monitoring. Simplex also offers digital control systems with PLC-based touchscreen interfaces and a rental fleet for temporary testing needs.

Differentiator

Problem solved

Functional benefit

Products and services

• dynaMITE Load Bank

Quantifiable outcome

• Load bank product line spans 500W to 5MW in single units; AC voltages to 15kV and DC voltages to 2400V available

Named customers8 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Scale indicators1 record

Recent moves6 records

Expansion highlights6 records

Direct peers

• Avtron Power Solutions: Avtron manufactures portable and stationary load banks for generator testing and is the most direct head-to-head competitor to Simplex in North America, offering similar resistive/reactive load bank products for the same mission-critical end markets.
• Crestchic Loadbanks: UK-based global manufacturer of resistive and reactive load banks for testing generators, UPS, and turbines. Directly comparable product portfolio to Simplex including containerized and trailer-mounted units, with a strong rental fleet business.
• ComRent International: ComRent is a specialized load bank rental provider offering both off-the-shelf and custom solutions for commissioning and testing mission-critical power systems. Direct competitor to Simplex's Build-to-Rent model, especially in the data center vertical.
• Powerohm Resistors: Powerohm designs and manufactures power resistors, dynamic braking resistors, and load banks for industrial and utility applications. Comparable product line focused on high-power testing and energy dissipation equipment used in similar end markets.
• Mosebach Manufacturing Company: Mosebach designs and builds load banks and dynamic braking resistors for generator testing and military applications. Comparable niche manufacturer serving power generation, military, and mining customers with similar high-power resistor technology.

Broad incumbents

• Generac Power Systems: Generac is a leading manufacturer of backup and prime power generators with a large installed base of standby systems requiring periodic load testing. Comparable commercial customer overlap with Simplex, especially in healthcare and small data center markets.
• ASCO Power Technologies: ASCO (Schneider Electric) is a large incumbent in power transfer switches, paralleling switchgear, and related critical power infrastructure. Adjacent to Simplex's market because ASCO-specified generator testing and NFPA compliance create pull-through demand for Simplex's load banks.
• Cummins Power Generation: Cummins manufactures diesel and gas generators and provides related power systems and services globally. Their generator dealer/service network is one of Simplex's stated customer segments, and Cummins is a potential competitor or partner in turnkey commissioning.
• Kohler Power Systems: Kohler manufactures industrial generators, transfer switches, and switchgear. While not a load bank maker, Kohler's generator dealer/service network is a key customer segment for Simplex, and Kohler could in theory expand into proprietary load testing equipment.

Regional players

• OPTIPOWER / Energy Rental Solutions: Load bank and temporary power equipment rental specialist serving primarily European and Middle Eastern markets. Comparable rental-led business model to Simplex's Build-to-Rent fleet, though focused on a different geography with less direct U.S. overlap.

Market position

Strengths1 record

Weaknesses1 record

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

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 Simplex