Every parked EV is a battery on wheels, and the grid would love to borrow it. The pitch is terawatt-hours of mobile storage; the reality in 2026 is expensive hardware, an interconnection wall, and economics that pencil for fleets and backup power but rarely for a homeowner chasing arbitrage.
Grid-Storage
-
Vehicle-to-Grid (V2G) Honestly -
Sodium-Ion Batteries Sodium-ion is not a worse lithium-ion. It is a different chemistry with a different cost structure that wins where energy density does not bind: grid storage, cold climates, and cheap short-range mobility. We walk the electrochemistry, the honest energy-density penalty, the genuine 2025-2026 deployments from CATL, BYD, and HiNa, and the one variable that decides whether it ever undercuts LFP: the price of lithium.