Quest One GmbH

The company focuses on the development, production, and supply of modular PEM electrolysis systems and related services. Key products include the compact ME450 turnkey electrolyzer (approximately 1 MW capacity) and the Modular Hydrogen Platform (MHP) for scalable industrial installations starting at 10 MW. These technologies support applications in heavy transport refueling, industrial decarbonization, e-fuels production, and power sector flexibility, delivering high-purity hydrogen with strong load-following capabilities.

Headquartered in Augsburg, Germany, Quest One maintains its primary engineering and assembly site there alongside an automated PEM stack production Gigahub in Hamburg capable of multi-gigawatt annual output at full scale. It has established a North American presence with operations in Houston, Texas, and supplies projects internationally, including electrolyzers for the 3 MW Helsinki hydrogen plant in Finland.

Acquired by MAN Energy Solutions in 2019 and operating as a subsidiary with majority ownership since 2021, the company draws on the engineering expertise, global sales network, and production scaling capabilities of MAN Energy Solutions and the Volkswagen Group. This structure positions Quest One as one of the leading European providers of PEM electrolysis technology, actively scaling toward industrial series production to support the broader hydrogen economy.