or will the Tesla charging plug fit the Kia EV6?
If I have to swap out the chargers, what might that cost?
Bit out of date, but so the thread has the right info: I actually bought a Tesla UMC to charge my EV6, since it's basically the best/most versatile mobile EVSE on the market from anyone, with all the plug adapters available.
I also bought a name-brand TeslaTap Mini 40A:
TeslaTap MINI 40 AMP (also comes in 60a and 80A, but you basically only need 80A if you drive a Taycan and frequent HPWC destination chargers). The name-brand version has a circuit that puts the Tesla EVSE (destination charger or universal mobile connector) into compatibility mode quickly when you plug the Tesla handle into it (they say wait 30s before then plugging into the car, I find 8 or so is fine).
You can also buy a third party Tesla to J1772 plug adapter i.e. Lectron on Amazon, for about $50 cheaper and $20 less shipping cost. But they're not TOTALLY compatible with the I5 and EV6 - you have to turn the car off, plug in, wait for the car to complain "charging unsuccessful," then go turn the car back on, THEN you can turn it off, lock it, whatever and it'll charge properly.
I decided to spend the extra $70 to avoid that hassle.
EDIT: Also: if you're talking about a UMC Gen2, just get a 40A TeslaTap. If you have Tesla wall connector wired to a circuit at the full 48A, I'd get the 60A adapter. The EV6 can't charge faster than that even with a more powerful EVSE, so pass on the 80A version.