AC Electronic Loads

Our AC electronic loads cover a wide range of power levels, voltage, and current. From bench to system, regenerative or unidirectional, and AC or AC & DC requirements, we offer optimal programmable loads up to 1250Vdc or 350Vrms AC.

AC Electronic Loads are essential for testing and validating AC power sources, inverters, UPS systems, and grid-tied equipment. Regenerative AC Loads return over 90% back to the grid or facility, saving energy and costs.

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Regenerative AC Load

RLS Series

Compact, Regenerative AC & DC Load

Up to 756kVA+

This high-power density Regenerative AC/DC Load Simulator is designed for testing any AC and DC load application with advanced transients.

Power: 6kVA to 21kVA, Up to 756kVA

Form: 1, 2, and 3 phase

Voltage: 30-350Vac L-N /0-606Vac L-L / 0 – ±475Vdc

Frequency: Up to 1,200Hz

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High Power Regenerative AC & DC Load, 30kVA to 1.1MVA

ELZ Series

High Power Regen AC & DC Load

Up to 1.1MW+

Fully regenerative 4-Quadrant AC and DC load with optional PHIL for testing any AC and DC load applications.

Power: 30kVA to 1.1MVA+

Form: 1, 2, and 3 phase

Voltage: 5-220Vac L-N / 9-380V L-L and 5-440Vac L-N / 9-760V-LL

Frequency: 15Hz-1000Hz

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Programmable AC Load

3C Series

Modular AC & DC Load

Up to 22.5kVA

Modular AC/DC Loads deliver flexible, precise testing for inverters, UPS, batteries, and power supplies, with scalable power to 22.5kVA/kW.

Power: Up to 22.5kVA

Form: Single phase

Voltage: 350Vac/500Vdc Std or 425Vac/600Vdc Option

Current: Up to 112.5A

Frequency: 40Hz-800Hz

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3D Series

Low Power AC & DC Load

Up to 5625W

Low Power AC & DC Load capable of handling both AC and DC inputs up to 280Vac and 400Vdc.

Power: Up to 5625W; Parallel up to 5.6kVA

Form: Single Channel

Voltage: 280Vac/400Vdc

Current: Up to 18.75A

Frequency: 40Hz-700Hz

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Frequently Asked Questions

An AC electronic load is a programmable test instrument used to simulate dynamic or steady-state AC loads on devices such as inverters, UPS systems, and grid-tied power sources. It allows engineers to evaluate performance under real-world loading conditions, including variable voltage, frequency, crest factor, and power factor. Designed to simulate real-world electrical conditions, these programmable loads allow engineers to perform dynamic load testing, power factor correction, and harmonic analysis with precision.

Loads with AC/DC capability means the electronic load can test both alternating current (AC) and direct current (DC) power sources within a single unit. This dual-mode functionality provides maximum flexibility for testing hybrid systems like renewable energy platforms, bidirectional converters, and power storage systems.

4-quadrant capability refers to a load or power source’s ability to both source and sink current and voltage in all four quadrants of the V-I plane. For electronic loads, this means the unit can handle forward and reverse voltage and current, enabling testing of active power flow and regenerative conditions—ideal for inverter, motor drive, and grid simulation testing.

Regenerative electronic loads return absorbed energy back to the grid instead of dissipating it as heat. This not only increases energy efficiency and reduces cooling requirements, but also lowers operating costs—making them ideal for high-power testing of EV chargers, solar inverters, and energy storage systems.