Current grid batteries are designed for daily energy shifts. But when it comes to keeping hospitals running through a four-day storm, their economics fall apart.

Major players like GM and CATL are pouring money into sodium-ion, proving that for stationary energy storage, weight doesn't matter. Is this the end of lithium's universal dominance?

Tens of gigawatts of batteries sit in server rooms, waiting for rare emergencies. This massive, underutilized resource could provide critical stability to our power grids.