EA-BT 20920-40 Triple 4U 3-Channel Regenerative Battery Tester

The EA-BT 20920-40 Triple 4U is a high-performance programmable dc power supply, programmable dc power source and industrial battery test system from EA Elektro-Automatik, also known as Elektro-Automatik BT 20920-40 and BT 20920-40 Triple, belonging to the BT 20000 Triple series. It serves as a reliable benchtop power supply from psu and tps programmable power solution, making it a top budget psu option with exceptional value for diverse power supply supplies demands, and addresses common questions of how can i test a power supply and high-voltage battery performance with professional-grade accuracy. As a versatile two quadrant battery tester, bidirectional battery tester and battery charge discharge tester, it functions as both a battery charge tester and a battery discharge tester, featuring regenerative energy recovery that feeds discharge energy back to the grid with up to 96.0% efficiency—making it a high efficiency battery tester, energy saving battery tester, low heat battery tester and cost saving battery tester ideal for TPS power supply applications, dc power supplies setups, and programmable power supply needs. This 4U rack mount battery tester and triple output battery tester is equipped with 3 independent channels, delivering 0-920 V DC battery tester voltage range, 0-40 A per channel battery tester current range, and 10000 W per channel battery tester power, with a total device power of 30000 W total power battery tester (automatically derated to 18000 W when operating on 208V AC input). It features autoranging DC output battery tester constant-power stages for flexible voltage and current combinations, supports CC CV CP CR battery tester regulation modes with fast crossover, and integrates essential battery testing functions including CC-CV discharge characteristics, battery ampere hour counter, and comprehensive alarm management. The device supports 208V-480V 3-phase AC input with active power factor correction achieving a typical 0.99 power factor, and features 18-bit high-resolution digital regulation with selectable voltage controller speeds (normal, fast, slow) for fast response battery tester performance. It delivers high accuracy battery tester measurements with ≤0.05% FS voltage accuracy and ≤0.1% FS current accuracy, along with low ripple battery tester performance of ≤70mV rms (300 kHz bandwidth) and ≤700mV pp (20 MHz bandwidth) in CV mode, and a 2.5V minimum sink voltage for reliable low-voltage operation. Equipped with 100μF output capacitance per channel, it provides stable power delivery, and offers robust insulation performance with ±1500V DC negative pole to PE, +2000V DC positive pole to PE, and ±2000V DC channel-to-channel isolation. All communication interfaces are galvanically isolated, including 1 ms EtherCAT, 1 Gbit/s Ethernet, USB, and CAN FD, enabling seamless integration into automated industrial battery test system setups. It also features per-channel digital I/O, temperature sensor inputs, and supports parallel operation of its three internal channels (up to 120A total current) as well as multi-unit parallel via Share-Bus and Master-Auxiliary bus for scalable high-power systems. The standard model uses temperature-controlled forced air cooling, with an optional stainless steel water cooling system available for continuous full-power operation in demanding environments, and includes overtemperature protection battery tester along with adjustable OVP, OCP and OPP for enhanced safety. Ideal for ultra high voltage battery tester applications, it excels as an EV battery tester, high voltage battery pack tester, energy storage battery tester, automotive battery test equipment, battery SOH testing equipment, battery EOL testing equipment, and battery recycling tester, supporting cell, module and pack testing, second-life classification, and end-of-line validation for electric mobility and energy storage industries.

Key Features

• 3-Channel Regenerative Bidirectional Design: Two-quadrant operation enables simultaneous charging and discharging, with grid regenerative electronic load functionality delivering up to 96.0% energy recovery efficiency.
• High-Voltage High-Power Performance: 3 independent channels with 0-920V DC voltage, 0-40A current, 10kW per channel, and 30kW total power (18kW derated at 208V AC input).
• 18-Bit High-Precision Regulation: Ultra-high resolution digital control with selectable speed modes, ≤0.05% FS voltage accuracy, ≤0.1% FS current accuracy, and ≤70mV rms/700mV pp CV ripple.
• Flexible Autoranging Output: Constant-power autoranging DC stages support wide voltage/current combinations, with CV/CC/CP/CR modes and fast crossover between regulation states.
• Integrated Battery Testing Functions: Built-in CC-CV discharge, ampere hour counter, and comprehensive alarm management for SOH, EOL, cycle life and capacity testing.
• Galvanically Isolated Industrial Interfaces: 1 ms EtherCAT, 1 Gbit/s Ethernet, USB, CAN FD, plus per-channel digital I/O and temperature sensor inputs for automation.
• Scalable Parallel Operation: Internal 3-channel parallel (up to 120A) and multi-unit parallel via Share-Bus/Master-Auxiliary bus for high-power test systems.
• Robust Safety & Cooling Options: Adjustable OVP/OCP/OPP, overtemperature protection, standard forced air cooling, optional stainless steel water cooling.
• Global Grid Compatibility: Auto-adapting 208V-480V 3-phase AC input with 0.99 typical power factor for worldwide deployment.
• Industry-Specific Applications: Optimized for EV battery packs, energy storage systems, high-voltage modules, battery recycling and automotive end-of-line testing.