The MegaEIS™ ME-514L400x800 is an ultra-high-capacity multi-channel load and EIS workstation, engineered specifically for the validation of industrial-scale, high-voltage hydrogen fuel cell stacks.

Featuring 514 fully synchronized measuring channels, it delivers true parallel EIS data across massive assemblies without multiplexing delays. Capable of sinking up to 400 A natively—and scaling up to 800 kW total power dissipation with an external booster—the system provides the robust, precise loading required to execute aggressive durability and efficiency tests on full-scale commercial stacks.

Key features

Designed for fuel cell stack research

Stack current up to 400 A

Stack voltage up to 800 V

Inner dissipated power of MegaEIS up to 20 kW

Maximum power with external booster up to 800 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 … 400 V

Total input current: Up to 800 A

Max. internal power dissipation: 20 kW

Max. supported external power: 800 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 ± 800 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 128+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

Full-Scale 800 V Stack Validation: Transition safely from module-level R&D to complete system validation. Monitor cell-to-cell uniformity across 514 channels simultaneously, instantly identifying localized voltage drops or weak individual cells within large commercial power plants operating under a 400 A load.

High-Voltage Dynamic Load Simulation: Replicate extreme power spikes native to marine, rail, or grid-scale stationary applications. Sink 400 A natively—or scale up to 800 kW with an external booster—to precisely evaluate transient stack responses, massive thermal gradients, and fuel starvation risks during rapid power fluctuations.

Continuous Water Management Diagnostics: Track specific impedance shifts across hundreds of cells under heavy, sustained loads. True parallel data acquisition pinpoints localized membrane drying or cathode flooding across the entire 514-cell assembly in real time, preventing irreversible cell reversal during maximum power output.

MegaEIS™ ME-514L400x800 – High-Current Load & EIS Workstation