Simplex Load Banks

Headquartered in Springfield, IL; Simplex is a high technology company that designs and manufactures electrical test systems (load banks) for the standby power generation industry.  Simplex is certified to
ISO 9001:2015

The Arthur N. Ulrich Company is the manufacturer's representative agency for Simplex in Ohio, Kentucky, Michigan, Indiana, West Virginia and Western Pennsylvania. 

Toll-Free: 1-800-848-2090    Email Us

Products / Solutions


Simplex GroupThe Simplex Load Bank product line spans 500 Watts to 5 Megawatts in single load bank units and can form systems of unlimited capacities when networked as modules. AC voltages to 15kV and DC voltages to 2400v are available. Standard product offerings include resistive, inductive, capacitive loads, air or liquid cooling, and a full line of digital controllers.

Small Portable
Hand-carryable or wheeled units to 150kW, AC or DC, air-cooled for production line or field use.  Some AC units may be networked to achieve desired capacity.

Large Portable
A comprehensive line of portable, flexible design load banks for factory or field use when testing a wide range of power generators.  150kW to 1000kW, AC to 600V, DC to 800V. 

Permanently installed resistive, inductive or capacitive load banks for factory or field use.  5kW to 5MW, AC to 600V (low voltage) to 15kV (medium voltage via transformer), DC to 800V.  Units may be combined and networked for unlimited system capacities. 

Trailer versions of Simplex Load Banks purpose-built for heavy-duty, field use.  250kW to 3000kW, AC to 600V, DC to 800V.  A wide selection of connection and control options.

Radiator Airflow Cooled
Permanently installed generator load banks utilizing the radiator airflow of an engine.  AC to 600V. 

An innovative line of water-cooled load banks to 600VAC to 3000kW.  Standard designs for fresh-water, glycol, cooling tower (high flow/low rise) and high-pressure (to 1500PSI) applications. 

Load Bank Systems
Resistive and inductive load banks for factory or field use.  5MW-100MW, AC to 600V (low voltage) to 34.5kV (medium voltage via transformer).  Units may be combined and networked to match requirements.

Digital Control
Digital and software systems for testing, automation and data acquistion. 

Visit for complete and up-to-date product information.

Rental Units


Quality Simplex Load Banks and accessories are available as rental units from Simplex, with Simplex technicians available for system set-up, start-up, training and operation.

Being the manufacturer, Simplex is uniquely able to Build-to-Rent. If what you need is not in our large fleet of rental products, we can Build-to-Rent.

In addition, Simplex can customize to your requirements and are not restricted to inventory. Rental Load Banks are portable units suitable for field use.

Contact Us

Contact us today to get started on your next project.  We look forward to assisting you!


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Representation In:

- Ohio
- Kentucky
- Indiana
- West Virginia
- Michigan
- Western Pennsylvania