AEM Water Electrolysis Pilot Stack – HXS-30 (30 kW)

  • Hydrogen production: 7.5 Nm³/h (7,500 L/h, approximately 15 kg/day)
    Stack efficiency: 84% HHV at beginning of life, measured on a 5-cell short stack at 1.756 V/cell and 330 A
    Power consumption: approximately 30 kW
    Water consumption: 6,300 mL/h at 350 A
    46 cells; 330 × 530 × 500 mm; 120 kg
    Development status: pilot stack under development and validation

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HXS-30 | 30 kW Pilot AEM Water Electrolysis Stack

A large-format pilot stack under engineering validation for higher-throughput AEMWE programs.

HXS-30 is the bridge between short-stack evidence and pilot-scale deployment. Measured 5-cell performance is reported separately from the 30 kW, 46-cell design targets.

At a glance

Development statusUnder engineering validation
Target hydrogen output7,500 L/h (7.5 Nm³/h, 15 kg/day)
Measured efficiency84% HHV on a 5-cell short stack
Measured point1.756 V/cell at 330 A
Active area600 cm² anode / 521 cm² cathode

Why HXS-30

  • Pilot-scale bridge: progress from short-stack testing to larger-area MEA and balance-of-plant validation.
  • Large active area: 600 cm² anode format for industrially relevant engineering work.
  • Modular roadmap: designed as a building block for larger demonstrations.
  • Evidence discipline: measured short-stack results and full-stack targets are clearly separated.

Target configuration

Target powerApproximately 30 kW
Target cells46
Reference condition0.3 M KOH at 60 °C
Target water use6,300 mL/h at 350 A
Target size / weight330 × 530 × 500 mm / 120 kg

Choose the right HydroXpand platform

HXS-0Cell-scale material and MEA evaluationUp to 25 cm²
HXS-2Reusable 2 kW stack for R&D and small pilots0.5 Nm³/h
HXS-30Pilot stack under validation7.5 Nm³/h target
HXB-V1Integrated 2 kW system with BOP and controls0.5 Nm³/h

Typical project scenarios

  • Large-area MEA validation before commercial stack design
  • Pilot plant and balance-of-plant development
  • Industrial integration and pre-commercial demonstrations

Include in your RFQ

  • Required production target and duty cycle
  • Pressure, temperature and electrolyte
  • Site integration, cooling and power interfaces
  • Validation milestones, schedule and quantity

Development note: 84% HHV is measured on a 5-cell short stack. The 30 kW, 46-cell output and dimensional values are design targets pending validation.

HydroXpand Inc.

HydroXpand Inc. is a South Korean deep-tech company that develops and manufactures Anion Exchange Membrane Water Electrolysis (AEMWE) electrodes, cells, stacks, and integrated systems. Founded in 2023 by three KAIST PhDs, we work across catalysts, electrodes, stack architecture, balance-of-plant, and control software to reduce both upfront and lifecycle costs for clean hydrogen production.

Our current portfolio includes iridium-free anodes, low-PGM cathodes, single-cell and short-stack hardware, the HXS-2 2 kW stack, and the HXB-V1 2 kW integrated system. The HXS-30 30 kW pilot stack is under development and validation. HydroXpand products have been supplied to more than 50 customers across 10 countries, and our technology portfolio includes nine patents. The HXB-V1 is supported by a CE Declaration of Conformity.

Our stack architecture is designed so that the durable hardware can be reused while the MEA is replaced, reducing maintenance cost and material waste. Customers can start with laboratory or pilot-scale equipment today and expand through a modular development roadmap toward larger industrial systems.

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