There are now a few large flow batteries. Here's one that's 400 megawatt-hours.[1] Round trip efficiency is poor and the installation is bulky, but storage is j

There are now a few large flow batteries. Here's one that's 400 megawatt-hours.[1] Round trip efficiency is poor and the installation is bulky, but storage is just tanks of liquid that are constantly recycled. [1] https://newatlas.com/energy/worlds-largest-flow-battery-grid-china/ https://newatlas.com/energy/worlds-largest-flow-battery-grid...