The answer to a transportation battery. The fluid can be exchanged for charged fluid, similar to filling a gas tank. That was a service station can recharge a car in a minute or so. The fluids are permanent, and do not degrade, so exchanging them is a safe thing to do. The old fluid can be recharged and pumped into the next car. Stations could be run on solar panels.

The Vanadium redox battery is a flow battery using ionic vanaduim in sulfuric acid across an osmotic membrane.

https://en.wikipedia.org/wiki/Vanadium_redox_battery