Today Volvo notified me that beginning 18 Nov 24, I can start charging my car, a Volvo C40, at Tesla SuperCharger fast chargers while on the road. The software to do this will be available on my EV's phone app as well as on some (but not all) Tesla SuperChargers. My car's computer will also show these locations on it's Google Map system.
That opens me up to use Tesla's fast Level 3 chargers on road trips. That would add about as much as 15,000 fast chargers that I can use. I must have a suitable adapter that allows charging an EV with J1772/CCS1 receptacles from Level 3 chargers with the North American Charge System (NACS) plugs, the standard previously only on Teslas. Ford, GM, and Rivian already have access to that. Soon, most European EVs will also have it. The NACS system will be standard for all EVs sold in Mexico, the USA, and Canada. In Europe, all EVs including Tesla will use the EU standard J1772/CCS1 plugs & receptacles.
Volvo dealers will begin selling adapters for this on 18 Nov, at an unknown price. On Amazon, I can find adapters for this selling from $190 to $240. I'll wait to see if the price falls after the initial buying wave.