ITM Power Plc designs and manufactures proton exchange membrane (PEM) electrolysers in the United Kingdom, Germany, Australia, rest of Europe, and the United States. Its product portfolio includes TRIDENT, an PEM electrolysers stack technology; NEPTUNE, a 2MW plug and play electrolyser for small to mid-size projects; and POSEIDON, a cutting-edge 20 MW module for large-scale projects. ITM Power Plc was founded in 2001 and is headquartered in Sheffield, the United Kingdom.