The proprietary compact cell-stacking and high power-density design used in EvolOH’s Nautilus™ series stacks was created for high-speed manufacturing using low-cost materials that only require domestic supply chains and no precious metals.
When operated using pure water, EvolOH’s electrolysers provide low capital and operating costs for green hydrogen production. With power ratings up to 5MW (2 tonnes per day) for a single stack, and 50MW (20 tonnes per day) for a single containerised module, EvolOH’s stacks are designed for
large-scale power-to-hydrogen facilities.
The Massachusetts plant, billed as ‘EvolOH’s Manufacturing Center of Excellence’, will combine development facilities and staff with a single line of EvolOH’s high-speed manufacturing process.
When fully operational, this facility will have a capacity for up to 3.75GW per year of electrolysers. Facility work will begin later this year with manufacturing starting in 2025.
EvolOH’s second manufacturing plant, planned to break ground in 2026, will have the capacity to make up to 15GW per year of electrolyser stacks.
Dr. Jimmy Rojas, Founder and CEO of EvolOH, said since founding its target was not just to develop a better, less expensive electrolysis technology, but also to develop a better, less expensive electrolyser manufacturing process.
He said, “Our Manufacturing Center of Excellence is the first step in those efforts, and we will continue to push the boundaries of our technology for lower cost and higher speed.”
Dr. Art Shirley, Chief Commercial Officer, EvolOH, said the path to Net Zero depends on green hydrogen, and the electrolyser manufacturing methods of today will never get us there.
He said, “For developers announcing green hydrogen mega-projects that will come on stream in the last half of this decade and beyond, electrolyser availability is as important as cost and efficiency.”
Nautilus™ offers single-unit stack capacities from 20 through to 2,000 kg/day and packaged stack modules of 10 and 20 tonnes per day.

