This kind of technology is one of the reasons that sodium-ion is going to scale much faster than the people focused on relative prices of Lithium think. (It is MUCH harder to build passively cooled Li-ion BESS (if its even possible above very small sizes))
This is a good news story for India and the climate and suggests that other global south countries will do even better.
Peak energy have some great tech and a great vision of BESS as cheap, super safe, silent, "install and forget" technology.