Stiesdal Hydrogen Increases Electrolyzer Output to 6.5 MW on Existing Platform

Stiesdal Hydrogen has released a new 6.5 MW electrolyzer unit built on its modular, outdoor-installed pressurized alkaline platform that has been in commercial operation since 2023. The platform has been deployed at facilities including European Energy's Måde PtX facility in Denmark, where a Stiesdal unit achieved first hydrogen production within 16 days of site delivery.

The increased output is achieved through doubled current density on the company's proprietary electrode and stack design. Stiesdal reports testing durability and long-term effects of the higher current density in laboratory and short-stack testing facilities with positive results.

Key technical specifications include:

• 1,275 Nm³/h net pure H₂ production
• 99.5% hydrogen purity
• Delivery pressure from ambient to 35 bar
• 15–100% operating range
• 4.8–5.1 kWh/Nm³ power consumption
• 2% and 50% power per second ramp-up and ramp-down rates
• 60,000-hour or 7-year stack lifetime at 100% capacity factor
• 22 m² footprint per MW

Capital expenditure is stated at below €500/kW for a 6.5 MW system including the MV transformer, with per-MW operation and maintenance costs reduced by approximately 50% compared to the previous 3.1 MW platform. The electrolyzer is designed for dynamic operation supporting frequent starts, stops, and fast ramp rates without affecting performance.

Originally reported by Hydrogen Tech World. Read the full article →