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