Very true. I think the big time arbitrage options are for vehicles that don't operate much. School buses Tractors / agricultural vehicles Delivery trucks Rental cars / fleet vehicles.

Just think about using school buses to power the grid. They generally don't operate at peak demand (6p in the summer). They are already distributed geographically and would have large batteries.

Most combines only operate 1x per year.

Suddenly these vehicles have an entire new use case.