The MegaEIS™ ME-42SL400x80 is a bi-directional workstation engineered for advanced testing of fuel cells, electrolyzers, and high-current battery modules. Featuring a combined source/load architecture, it handles up to 400 A and 80 V.

With 42 fully synchronized measuring channels, the system delivers true parallel EIS data across the entire assembly. This enables seamless, continuous charge and discharge cycling without switching external hardware, precisely capturing real-time impedance shifts even under aggressive dynamic loads.

Key features

Designed for advanced fuel cell stack, electrolyzer, and battery module R&D

Bi-directional source/load architecture for continuous charge/discharge cycling

Stack current up to ±400 A

Stack voltage up to 80 V

Maximum power capacity up to 32 kW

EIS measurement one cell gradually or all cells simultaneously

High-precision current sensing of both DC and AC components

Technical specifications

Power supply: 110 … 240 V AC / 50 … 60 Hz

Dimensions: Modular design for 19“ rack cabinet; 125 kg

Input voltage: 0 … 80 V

Total input current: Up to 400 A

Max. internal power dissipation: 32 kW

Sampling:

24-bit ADCs, low-noise 50/60 Hz filtered sampling
Up to 1.25 Msps for EIS measurements

Measurement resolution: 0.001% of selected range

Accuracy

Voltage: ≤ 0.1% of range + 0.1% of reading
Current: ≤ 0.1% of range + 0.5% of reading

EIS frequency: 1 mHz ... 100 kHz

EIS amplitude: Up to 20% of maximum internal current for < 1 kHz

2× voltage probe with EIS: Up to ± 80 V

EIS channel voltage range: ± 5 V (max. voltage span over one EVM8 module: 24 V / each 8 channels)

Number of EIS channels: Up to 40+2 (limited by max. voltage)

8 channels per one EVM8 module

Connection: USB 2.0, Ethernet

Software

Control software for MS Windows
Features: measurement setup and control, data acquisition, processing and visualization, Pascal or Python scripting, remote control by TCP/IP server for integration with top-level control system, examples for remote control using Python or LabVIEW.

Use cases

High-Current Battery Module Cycling: Execute dynamic charge and discharge profiles on low-voltage, high-current battery modules. True parallel EIS captures state-of-health (SoH) variations across all 42 cells simultaneously during active operation, eliminating multiplexing delays and the need for manual probe reconnection.

Reversible Fuel Cell (rSOC) Validation: Evaluate cell stability and degradation by seamlessly alternating between power generation and electrolysis modes. The bi-directional hardware allows you to run continuous cyclic profiles and accurately measure impedance shifts without breaking the circuit or reconnecting cables.

High-Current Transient Diagnostics: Monitor the stack's response to severe power surges up to 400 A. The integrated low-impedance current sensor and fully synchronized architecture ensure highly accurate measurement of both AC and DC current components, free from the parasitic effects typical of external boosters.

MegaEIS™ ME-42SL400x80 – Bi-Directional Workstation for Fuel Cells, Electrolyzers & Batteries