Bidirectional, Regenerative Sources and Loads

Using Bidirectional and Regenerative Sources and Loads

Many types of modern electrical devices recycle power back to the grid or must sink and source current for a variety of applications. Using regenerative AC & DC sources and loads allows for realistic test scenarios and a more efficient testing process. For example, Electric Vehicle bidirectional dc-dc converters and on-board chargers (OBC) sink and source current to the battery when charging/discharging or for regenerative breaking . Bidirectional sources allow these devices to be tested without the need for cumbersome test setups, batteries or multiple conventional sources. And with advanced software these test setups can be converted to closed-loop hardware-in-the-loop simulations which produce real-time test results.

So why adopt this technology? Regenerative AC & DC sources and loads can more closely simulate real-word operating environments, reduce the number of instruments needed in your test lab, and reduce energy usage over traditional test equipment which can only discharge power in the form of heat. When used widely in high power applications, this testing technology saves electricity costs and promises to significantly reduce carbon footprints around the globe.

Regenerative and Birdirectional Loads and Sources

Regenerative AC Electronic Load

Chroma 63800R

9kVA, 12kVA, 15kVA

30Vrms - 350Vrms

30Hz - 100Hz

63800R AC Electronic Loads presents a highly efficient regenerative switching-type solution for higher-power renewable energy applications.

Regenerative DC Electronic Load

Chroma 63700

6kW, 12kW, 18kW

600V, 1,200V, 1,800V

Up to 120A

Offers high power density within a compact 3U form factor, with power ratings reaching up to 18kW per unit and currents of up to 120A.

Bidirectional DC Power Supply + Regenerative Load

Chroma 62000D




Bidirectional DC Power supplies with high accuracy and the widest operating range provide better control for testing bidirectional EV components, batteries, and PV inverters.

Regenerative Grid Simulators 9kVA-15kVA

61800 High Density




Four quadrant, single- or three-phase AC power sources designed to simulate real-world grid characteristics for EV, PV inverter, and smart-grid test applications.

Regenerative Grid Simulator

Chroma 61800




Full 4 quadrant, fully regenerative, AC power supply designed for common electrical product testing such as home appliances and industrial electronics that require a programmable input source

Chroma 62000D bidirectional DC power supplies provide both programmable DC power and regenerative loading in a single high density 3U package. This two quadrant design allows the power generated from the device under test to be fed back to the grid with high efficiency – making them the best choice for testing renewable energy and bidirectional power conversion systems such as on-board chargers for electric vehicles, bidirectional DC to DC converters and motor drivers. This instrument can also preform charge/discharge testing on batteries as well as optional battery simulation.

New Chroma 61800 models include power ratings of 9kVA, 12kVA, and 15kVA, selectable single phase or 3-phase touch screen operation in a 3U package. Chroma 61809/61812/61815 models are regenerative providing a complete energysavings solution. The power generated by the DUT during the test can be easily fed back to the grid, rather than dissipated as heat, which lowers the cost of operation and protects the environment.

Automated Test Systems

Regenerative Battery Pack Test System

Chroma 17020

20V/ 60V/ 100V/ 200V/ 500V

65A/ 13A/ 62.5A/ 50A/ 30A

1.25kW/ 600W/ 2.5kW

Designed for secondary battery modules and pack tests, with accurate sources and measurements suitable for performing repetitive and reliable tests.

Regenerative Battery Pack Test System

Chroma 17040

60kW/ 120kW/ 180kW/ 250kW/ 300kW



With an Energy Regenerative Function to reduce power consumption during discharge, ensuring a stable power grid without generating harmonic pollution on other devices.

Regenerative Battery Pack Test System

Chroma 17040E

100kW*14, 200kW, 200kW*14, 300kW*14

5~850V, 100~1700V


High-power battery test system up to 1700V/4800A/1.2MW with regenerative capabilities, dynamic profile simulation, and advanced safety features.

Regenerative Battery Pack Test System

Chroma 17020E

10kW / 20kW / 30kW / 40kW / 50kW / 60kW / 70kW / 80kW per channel

60V / 100V / 200V

100A / 200A / 300A / 400A / 500A / 600A / 700A / 800A per channel

High precision system specifically designed for secondary battery module and pack testing

Battery Simulator

Chroma A170202

Validate your battery-connected devices more efficiently and with more accuracy with this battery simulator

Battery Reliability Test System

Chroma 17010

Up to ±0.015% of full scale

Up to 100µS

Up to 10mS

Chroma’s Battery & Reliability Test System is a high-precision system designed specifically for testing lithium-ion battery (LIB) cells, electric double-layer capacitors (EDLCs), and lithium-ion capacitors (LICs).

Battery Reliability Test System

Chroma 17010H

±0.015% of F.S.

±0.005% of F.S.


High-precision charge and discharge test equipment specifically designed for high current/high power performance testing

Regenerative Battery Test Solutions

High precision, integrated battery and energy storage test equipment designed for lithium ion and other battery chemistries. From cell to battery pack, we provide advanced battery test features including regenerative discharge systems that recycle energy sourced by the battery back to the channels in the system or back to the grid.