So yes…and it depends. With a tesla if you are using a proper TT30 adapter for the mobile charge cord the tesla will charge at max 24 amps on a TT30. These are smart adapters and tell the EVSE (the charge cable) that it is hooked into a 30 amp 120 volt receptacle and that the most it can draw is 24 amps. But if the voltage drops to around 113 volts it will reduce the charging to 18 amps. If it drops another 3 volts it will reduce it to 12 amps. It will continue to charge at the lower rate until the voltage returns to a higher level and stays there. Then it will ramp back up.
We charge almost exclusively on 30 amp sites when camping as we rarely rent 50 amp sites. (They are not as common up here in Canada…or at least not where we camp.
Non tesla EV’s have to jump thru a few hoops with a couple of adapters to charge at 30 amp sites at anything other than 12 amps but I’m told it can be done on some cars.
Here is a pic of us charging at a 30 amp site somewhere on the Sunshine Coast. I think it was Powell River.
