EA-BT 20920-120 4U WC Water-Cooled Regenerative Battery Tester

The EA-BT 20920-120 4U WC is a high-performance programmable dc power supply, programmable dc power source and industrial battery test equipment from EA Elektro-Automatik, serving as a reliable benchtop power supply from psu and tps programmable power solution for high-demand industrial testing. It belongs to the EA-BT 20000 series battery tester, also known as EA-BT 20920-120, and is a premium EA Elektro-Automatik water cooled battery tester designed for continuous high-power operation, making it a top budget psu option with exceptional durability and energy efficiency, meeting diverse power supply supplies demands for battery testing and power validation across automotive and energy industries. As a versatile two quadrant battery tester, bidirectional battery tester and battery charge discharge tester, it supports regenerative energy recovery and grid feedback battery tester functionality, feeding discharge energy back to the grid with up to 96.0% efficiency—making it an ultra high efficiency battery tester, energy saving battery tester and low heat generation battery tester ideal for TPS power supply applications, dc power supplies setups, and programmable power supply needs. This 4U rack mount battery tester and 19 inch rack battery tester delivers 0-920V DC battery tester voltage range, 0-120A battery tester current range, and 30kW battery tester total power, with automatic derating to 18kW when operating on 208V AC input. It features autoranging battery tester constant-power DC output for flexible voltage and current combinations, supports CC CV CP CR battery tester regulation modes with fast crossover, and integrates advanced battery testing functions including CC-CV discharge characteristics, ampere hour counter, dedicated battery test mode, and battery simulation tester capabilities for comprehensive battery characterization. The device supports 208V-480V 3-phase AC input with active power factor correction achieving a typical 0.99 power factor, and features 16-bit ADCs and DACs digital regulation with selectable voltage control speeds for fast regulation speed battery tester performance. It delivers high accuracy measurement battery tester results with ≤0.05% FS voltage accuracy and ≤0.1% FS current accuracy, along with ≤70mV rms ripple battery tester (300 kHz bandwidth) and ≤500mV pp ripple battery tester (20 MHz bandwidth), and a 2.5V minimum sink voltage for reliable low-voltage operation. Equipped with 300μF output capacitance, it provides stable power delivery, and offers robust insulation performance with ±1500V DC negative pole to PE and +2000V DC positive pole to PE insulation. All communication interfaces are galvanically isolated interface battery tester compliant, including 1 ms EtherCAT, 1 Gbit/s Ethernet, USB, and CAN FD, enabling seamless integration into automated battery test system setups. It also features digital I/O, temperature sensor inputs, and supports share bus parallel battery tester operation via Share-Bus and Master-Auxiliary bus, allowing up to 64 units to be combined into a single system with up to 1920 kW total power. The unit comes standard with a stainless steel water cooling system, weighing 56 kg, which ensures stable continuous operation even under maximum load in high-temperature industrial environments, eliminating the need for extensive air conditioning. Ideal for high voltage EV battery tester, automotive battery pack tester, energy storage system battery tester and high voltage battery module tester applications, it excels at battery SOH testing equipment, battery EOL testing equipment, battery recycling tester and battery cycle life tester tasks, addressing questions of how can i test a power supply and high-voltage battery performance with reliable, reproducible results. It meets strict international safety and EMC standards including EN 61010-1, IEC 61010-1, UL 61010-1 and EN 55011 Class A, ensuring compliance for global deployment.

Key Features

• Regenerative Bidirectional Operation: Two-quadrant design enables both charging and discharging, with grid energy recovery up to 96.0% efficiency to cut energy costs and reduce heat output.
• High-Voltage High-Power Performance: 0-920V DC voltage range, 0-120A current range, 30kW total power (18kW derated at 208V AC input) for wide high-voltage battery testing coverage.
• Precise Regulation & Measurement: 16-bit ADC/DAC digital regulation, ≤0.05% FS voltage accuracy, ≤0.1% FS current accuracy, ≤70mV rms/500mV pp CV ripple, and 2.5V minimum sink voltage.
• Flexible Autoranging Output: Constant-power autoranging DC output supports diverse voltage/current combinations, with CV/CC/CP/CR modes and fast crossover between regulation states.
• Integrated Advanced Testing: Built-in CC-CV discharge, ampere hour counter, battery test mode and battery simulation for cycle life, SOH and EOL characterization.
• Stainless Steel Water Cooling: Efficient closed-loop water cooling system enables continuous full-power operation in demanding industrial environments with minimal noise.
• Galvanically Isolated Interfaces: 1 ms EtherCAT, 1 Gbit/s Ethernet, USB and CAN FD, all isolated from DC side for safe and reliable industrial communication.
• Highly Scalable Parallel Operation: Up to 64 units parallel via Share-Bus/Master-Auxiliary bus for systems up to 1920kW, with automatic equal load distribution.
• Global Compatibility & Safety: Auto-adapting 208V-480V 3-phase AC input, 0.99 typical power factor, and full OVP/OCP/OPP/OT protection suite.
• Industry-Specific Applications: Optimized for EV battery packs, energy storage systems, high-voltage modules, battery recycling and automated production line testing.