[bluGill]

Generally you aim for 1/3 gas, 1/3 tobacco, 1/3 snacks. While gas is by far the lowest margin, it is very high volume, with many people not buying anything else.

[bombcar]

Fast charging stations will likely eventually do even better with the required 15-30 minute stop encouragement toward a coffee or a snack.

[bluGill]

Probably, but since most charging will be at home, there will be a lot less total $ in play. Great gig if you can be on a route people travel long distances, but otherwise not much profit.