The MegaEIS™ ME-42L500x50 is a high-power multi-channel load and EIS workstation, engineered specifically for mid-size hydrogen fuel cell stacks operating at extreme current densities.

Featuring 42 fully synchronized measuring channels, it delivers true parallel EIS data across the assembly without multiplexing delays. Capable of sinking up to 500 A natively—and fully compatible with external boosters up to 100 kW for expanded capacity—the system provides the aggressive, stable loading required to validate heavy-duty fuel cells under real-world dynamic conditions.

Key features

Designed for fuel cell stack research

Stack current up to 500 A

Stack voltage up to 50 V

Inner dissipated power of MegaEIS up to 8 kW

Maximum power with external booster up to 100 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

Input voltage: 0 … 50 V

Total input current: Up to 500 A

Max. internal power dissipation: 8 kW

Max. supported external power: 100 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 ± 50 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

Heavy-Duty Stack Validation: Bridge the gap between cell-level R&D and automotive-scale stacks. Monitor cell-to-cell uniformity across 42 channels simultaneously, instantly identifying voltage imbalances or weak components within large-format cells operating at 500 A.

Extreme Drive Cycle Simulation: Replicate aggressive load profiles for commercial and heavy-duty transport applications. Sink up to 500 A natively—or integrate an external booster for even higher demands—to evaluate transient stack responses, thermal stability, and fuel starvation risks during rapid power fluctuations.

High-Current Water Management Diagnostics: Track specific impedance shifts under massive, continuous loads. True parallel data acquisition pinpoints localized membrane drying or cathode flooding across the 42-cell stack in real time, preventing irreversible cell reversal during peak power operation.

MegaEIS™ ME-42L500x50 – High-Current Load & EIS Workstation