World’s largest integrated solar-hydrogen-storage project

Off the coast of Rudong, Jiangsu, China has completed the world’s largest integrated solar-hydrogen-storage project. A 400 MW coastal solar farm, a 60 MW/120 MWh battery, and a green-hydrogen plant making 482 tons a year — all wired together, with a dedicated submarine cable feeding sunlight straight into the electrolyzer.

The linked excellent short video (8 min) from Interesting Engineering gives an engineering breakdown of what China built, and explains why it matters.

Source: IE Explains, July 4, 2026.
Video: https://youtu.be/K4gm9lEprMw

Read more: WINSS, July 2, 2026. https://www.winssolutions.org/china-solar-hydrogen-storage-project/