This research is dedicated to creating a concept and description of further experience of implementation of digital twin of electrolyzer in green hydrogen production industry. Being from one hand in line with general scientific direction of researchers to create universal library of industrial digital twins for all large, scaled industries and equipment assets, from another hand subjected research is extremely topical and relevant to global agenda related to sustainability, renewable energy sources, green and zero carbon technologies. Authors investigate hydrogen value chain and different types of electrolyzers, than apply their industrial digital twin concept to selected green hydrogen electrolyzer stack concluding integrated optimization and green hydrogen economics using digital twin technology.