24 hours worth of storage worldwide is 60 TWh currently. Once Asia and Africa become more developed this will likely become closer to 100 TWh. By comparison ann

24 hours worth of storage worldwide is 60 TWh currently. Once Asia and Africa become more developed this will likely become closer to 100 TWh. By comparison annual global battery production is just under 0.3 TWh - and only a small fraction of this goes to grid storage, the bulk goes to electronics and electric vehicles. This leaves experimental solutions like the Sabatier process, Hydrogen storage, or more exotic things like lifting concrete cylinders with pulleys.