The energy storage project includes 42 energy storage warehouses and 21 machines integrating energy boosters and converters, using large-capacity sodium-ion batteries of 185 ampere-hours, with a 110-kilovolt booster station as a supporting facility, according to information. . The energy storage project includes 42 energy storage warehouses and 21 machines integrating energy boosters and converters, using large-capacity sodium-ion batteries of 185 ampere-hours, with a 110-kilovolt booster station as a supporting facility, according to information. . (Yicai) July 1 -- China Datang said the first phase of its sodium-ion battery new-type energy storage power station project in Qianjiang, Hubei province, the largest such project in the world, has become operational. The projects will have a total annual capacity of 100 megawatt/200 MW-hours, with. . In the Hubei province in China, 50MW/100MWh is just the first phase of the sodium-ion battery energy storage system (BESS) project spearheaded by Sineng Electric. The project should eventually have a storage capacity of 100MW/200MWh. Construction has already started on the 50MW/100MWh project in Qianjiang, Hubei province, according to Shanghai Metals Market (SMM).