I talked about it with a gas station owner I see regularly. He can't add a charging space because then he needs another parking spot (zoning,) a power service upgrade, a large transformer, etc. Over $150k in cost. Without solar. Most stations don't have anywhere near that cash.
And that's not even factoring charging for it. They're not set up for it. "Well just ho-" IF you can get one of the 'networks' to agree to it? You eat all the power setup costs, all the building costs, maintenance and repairs are at their whim, and you only get a fixed payment.