Fusion Fuel Green PLC is an Ireland-based holding company. The Company provides full-service energy engineering and advisory solutions. It specializes in green hydrogen and broader industrial gas applications. It has developed a Proton Exchange Membrane (PEM) electrolyzer, known as the Direct Coupled Photo Electrochemical Hydrogen Generator (the HEVO), which is used to produce green hydrogen. The HEVO technology incorporates a modular building-block architecture designed for small-to-midscale green hydrogen projects. Its focus is on research and development related to HEVO technologies. It is a supplier of electrolyzer technology for third-party-led and owned projects and offers engineering and procurement services for developers constructing hydrogen plants. Its solar-to-green hydrogen plant, H2Evora, comprises approximately 15 HEVO-Solar generators equipped with generation of HEVO micro-electrolyzer. Its subsidiaries are Fusion Fuel Spain, S.L., Fusion Fuel USA, Inc., and others.