How does supercharging get figured when you rent a Model 3 on Turo? I assume the owner gets billed and you pay them back or is supercharging included in the rental fee? With regular car rental companies, they bill you for gas and tolls and everything. I imaging renting a Model 3 through a regular car rental company they would end up billing you the Supercharger fees.
I rented a Model S on Turo earlier this month. I communicated very clearly with the owner on this so there would be no misunderstanding after the fact. We agreed that I'd pay any Supercharger and toll fees (he had a SunPass, I pretty much kept to toll highways). When the trip was done, I handed back the car and we both inspected it. A few days later he posted a screen shot of my tolls (about $19) and there was a Supercharger fee of $0.00 (I stayed a bit long at a SuperCharger - long lines at the restaurant, but I guess either not long enough to be charged, or the SuperChargers never got > 1/2 full). He submitted an extra charge through Turo (best that way, therefore there's a mediator in case of a dispute) and I got a message on my Turo app that he was requesting $19 in additional payment. I agreed to the charges and Turo charged my credit card on file and I presume passed the money on to the car's owner.
Two issues I had renting on Turo, for those who are considering this. The first is that unlike a large car rental agency, the owner likely doesn't have a backup car of the same type to rent you in case something goes wrong. With the first Model S I reserved, I got a message a few weeks before flying to Florida that his car got totaled in an accident. I felt very bad for him, but this also left me scrambling to find another Model S on short notice. I did manage to find one, but be aware of this possibility.
The second issue has to do with the app. Without the app, I had no way of knowing what the state of charge was while eating at a restaurant and charging at a SuperCharger. I was quite concerned when I returned to the car after lunch and discovered that the battery was at 100% (S60 with 70 kWh battery and owner keeps the charge limit to 100%). I had no idea how long it had been at 100% and worried that I'd possibly incurred idle charges. As I don't own a Tesla, I'm not sure how to work around this issue, but it is certainly an issue that should be considered by those considering using Turo.