There's some more detail on the construction, and what becomes of the hydrogen (it will be stored in large pressurized steel tanks) here: https://cen.acs.org/en

There's some more detail on the construction, and what becomes of the hydrogen (it will be stored in large pressurized steel tanks) here: https://cen.acs.org/energy/energy-storage-/New-battery-serve-grid/96/web/2018/05 https://cen.acs.org/energy/energy-storage-/New-battery-serve...