Gas and engineering company BOC says its plant at Glenbrook will produce the first supply of certified carbon-free, or "green", hydrogen in New Zealand.
BOC, a subsidiary of the American-Anglo-German multinational Linde plc, said it would make carbon-free hydrogen for the neighbouring New Zealand Steel plant.
The company said the move could pave the way for providing carbon-free, or "green" hydrogen for transport.
BOC's plant uses an electrolysis process to produce industrial and fuel-cell grade hydrogen.