Neste has partnered in the MultiPLHY consortium. The MultiPLHY project aims at installing, integrating and operating the world's first high-temperature electrolyzer system in multi-megawatt-scale (~2.4 MW) at Neste’s renewable products refinery in Rotterdam to demonstrate production of green hydrogen for the refinery's processes. The technology of the high-temperature electrolyzer is provided by electrolysis company Sunfire. In spring 2023 Sunfire installed twelve electrolysis modules at the Neste Rotterdam refinery, which together make up the world's largest high-temperature electrolysis system (2.6 MW) installed in an industrial environment. The electrolyzer is estimated to be in operation by the end of 2024.