According to this article, a guy returned his Tesla with 96% charge just like he picked it up with, and they charged him.
https://www.thedrive.com/news/hertz-is-charging-tesla-model-3-renter-277-fee-for-gas-wont-back-down
“You might ask, maybe Hertz was charging Lee for having to top the Model 3’s battery upon its return? According to the final receipt, the customer gave the Model 3 back to Hertz with the battery 96% full, the exact same state of charge it was picked up with.”
The problem with an EV is that they loose charge just by sitting. So you could charge them to 100 percent and in few days they may be down to 96 percent. They are an energy disaster.