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.
| Development status | Under engineering validation |
| Target hydrogen output | 7,500 L/h (7.5 Nm³/h, 15 kg/day) |
| Measured efficiency | 84% HHV on a 5-cell short stack |
| Measured point | 1.756 V/cell at 330 A |
| Active area | 600 cm² anode / 521 cm² cathode |
| Target power | Approximately 30 kW |
| Target cells | 46 |
| Reference condition | 0.3 M KOH at 60 °C |
| Target water use | 6,300 mL/h at 350 A |
| Target size / weight | 330 × 530 × 500 mm / 120 kg |
| HXS-0 | Cell-scale material and MEA evaluation | Up to 25 cm² |
| HXS-2 | Reusable 2 kW 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 2 kW system with BOP and controls | 0.5 Nm³/h |
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. 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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