Hydrogen production: up to 500 L/h (0.5 Nm³/h, approximately 1 kg/day)
Stack efficiency: 88% HHV at beginning of life (60 °C)
Continuous operation demonstrated for more than 2,400 hours (0.3 M KOH, 40 °C)
Power consumption: approximately 2 kW
Water consumption: 420 mL/h at 50 A
23 cells; 190 × 210 × 215 mm; 19 kg
Replaceable MEA with reusable stack hardware
A compact, serviceable stack for laboratory systems, pilot equipment and small-scale hydrogen projects.
HXS-2 combines HydroXpand's iridium-free anode, low-PGM cathode and reusable stack hardware in a standardised 23-cell platform. Replace the MEA while retaining the precision housing and balance hardware.
| Hydrogen output | Up to 500 L/h (0.5 Nm³/h, approximately 1 kg/day) |
| Stack efficiency | 88% HHV at beginning of life, 60 °C |
| Continuous operation | More than 2,400 h demonstrated at 0.3 M KOH, 40 °C |
| Configuration | 23 cells, replaceable MEA |
| Size / weight | 190 × 210 × 215 mm / 19 kg |
| Operating condition | 0.3 M KOH at 60 °C |
| Operating current | 15–67 A, 50 A recommended |
| Water consumption | 420 mL/h at 50 A |
| Active area | 98 cm² anode / 79 cm² cathode |
| Power | Approximately 2 kW |
| HXS-0 | Cell-scale material and MEA evaluation | Up to 25 cm² |
| HXS-2 | Reusable stack for R&D and small pilots | 0.5 Nm³/h |
| HXS-30 | Pilot stack under validation | 7.5 Nm³/h target |
| HXB-V1 | Integrated system with BOP and controls | 0.5 Nm³/h |
Data note: performance depends on configuration and operating conditions. Request the applicable test protocol and full data package.
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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