Ceres Power Holdings plc is a UK developer of solid oxide electrolyzer cell and solid oxide fuel cell technology for use in distributed power systems aimed at decarbonising cities, factories, data centres and electric vehicle charging. Founded in 2001, it is headquartered at Horsham in the UK. It is listed on the London Stock Exchange. It is also classified by the LSE Green Economy Mark, which recognises listed companies that derive more than 50% of their activity from the green economy. Wikipedia