The good thing about grid storage is that you don't need the weight and density of lithium. That's especially good because it looks like we don't have enough l

The good thing about grid storage is that you don't need the weight and density of lithium. That's especially good because it looks like we don't have enough lithium for electrification of transportation. Lithium supplies will improve in a few years, but right now I think we should incentivize using lithium in mobile applications. There are plenty of technologies for power storage that don't use lithium.