The EU looks towards 27% of renewable energy consumption in 2030. The penetration of intermittent renewable electricity based on solar and wind energy increases the need to match supply and demand for power. Electrolysis is a means to convert excess electricity into hydrogen that can be stored and re-electrified at a later time, or used for other energy consuming or industrial processes. As a flexible load the, alkaline water electrolysis can also offer grid balancing services provided that it is of sufficient capacity and responsiveness to participate in the power industry’s balancing markets.