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High-power EIS Analysis System

Up to 1000 V | 2000 A | 20/250 kW | 1000 EIS channels

MegaEIS product family is a modular testing system for EIS analysis of H2FC stacks. System is designed for cooperation with external DC load which handles most of the stack power. System also provides continuous cell voltage monitoring feature, even during EIS acquisition


Maximum Solution Details 

For fuel cell stacks, electrolyzers, Simultaneous multi-channel EIS Acquisition

  • Stack voltage up to 1000 V
  • Stack current up to 2000 A
  • Inner dissipated power of StackEIS up 20 kW
  • EIS measurement one cell gradually or all cells simultaneously
  • High precision current sensing of both DC and AC components


Typical applications include hydrogen fuel cells, water electrolyzers, solid-oxide cells, redox-flow batteries, and lithium batteries with high-current and high-power requirements. Additionally, EIS is utilized in applied research, manufacturing testing, and quality control.



StackEIS-M product family is a precise modular testing system for EIS analysis of fuel-cell stacks
and electrolyzers. System consists of power stage which handles the power, and EIS acquisition
system which can perform impedance spectroscopy analysis at all cells simultaneously.

For fuel-cell stacks, power stage is built from EIS load modules. Your stack can have up to 1 000
cells and provide current up to 2 kA. System is designed for cooperation with external DC load
which may handle most of the stack power (up to 300 kW).
Maximum internal power dissipation of StackEIS-M power s tem is water-

For electrolyzers, power stage is extended by internal or external power supply, so the system works as regulated power source, capable of EIS measurement.

EIS acquisition runs simultaneously on all channels, so the system is suitable for rapid and precise analysis in R&D, for QA in manufacturing, or in service diagnostics. StackEIS-M also provides DC cell voltage monitoring and enables characteriza-tion using important electrochemical methods
– Polarization Curves, Chronopotentiometry and Chronoamperometry, Load Cycling, Current Interrupt Technique, etc.

Unlock Power with EIS Analysis

Electrochemical Impedance Spectroscopy (EIS) analysis is the ultimate technique to unlock the secrets of your electrochemical devices. Whether you are working with hydrogen fuel cells, electrolyzers, batteries, or any other system that involves electric current and chemical reactions,

EIS analysis can give you a complete picture of what’s going on inside your devices. A standout feature of the EIS method is its unique ability to analyze your device seamlessly, during its standard operating conditions.




Power supply 110..230 V AC / 50..60 Hz 
3x 400 VAC for high-power devices
Dimensions Modular design for 19“ rack cabinet
Protection rating IP20
Input Voltage Up to 1000 V *)
Total input current
(internal + external load)
Up to 2000 A *)

Internal load current Up to 2000 A *)
Maximum internal load
power dissipation
20 kW *)
Cooling   Water
Stack electrometer voltage ranges Up to ±1000 V

24-bit ADCs, low-noise 50/60 Hz
filtered sampling for DC measurements
24-bit ADCs, 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
Acquisition methods

constant V, I, open circuit, manual control
chronoamperometry, chronopotentiometry
linear sweeps, polarization curves, current
interruption load cycling/profiling
EIS – electrochemical impedance
spectroscopy programmable sequences
of all available methods

EIS frequency 1 mHz .. 100 kHz
EIS amplitude Up to 20% of maximum internal current for
< 1 kHz
EIS channel voltage range ±3 V (can be customized)
Number of EIS channels Up to 1000 (limited by max. voltage)
8 channels per one 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.