Stiesdal Hydrogen

The layout is modular by design, focused on simplicity and functional efficiency. Each electrolyzer is a self-contained unit, built from components supplied by leading European Tier-1 partners. It consists of four modules, delivered on two standard trucks, ready for rapid deployment.

No buildings are required, and support systems  are modular, offering built-in redundancy.

The basic module is a 3.1 MW electrolyzer unit. Projects can start small – for example, 12,4 MW with four units – and expand stepwise to 25 MW, 50 MW, or beyond.

The system cold-start time is under five minutes. It ramps at 1% per second, operates across a wide load range, and shuts down instantly.

The electrolyzer is optimized for intermittent operation with minimal degradation over thousands of start-stop cycles.

This dynamic capability enables hydrogen plants to act as demand-side participants in electricity markets and ensures smooth integration with variable renewable electricity sources.

Electrodes and support systems are designed for high efficiency throughout, and the electrolyzer stack features internal electrode cooling to ensure uniform temperature and minimize electrical losses.

The stack is integrated into a pressure vessel, providing outdoor protection while delivering hydrogen at up to 35 bars without compression losses, reducing downstream CAPEX and OPEX.

All modules are built from components already in mass production, minimizing cost and enabling rapid production scale-up.

Our standardized system requires only a minimal set of interfaces at the fence line:

• Medium voltage AC power supply Simple purified water
• SCADA control signal

Proven control and power systems from the wind industry ensure full grid-code compliance with no need for supplementary STATCOMs, harmonic filters, capacitors, or reactors.