Charging from home 50amp RV outlet

Rogers916 said:

So probably best to just have an electrician replace it with a 14-50? Or just hardwire something into it?

We may have other EVs in the future. What’s best for broad compatibility?

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On EV forums hardwired is preferred and its what I have. That seems to be centered around antidotal evidence basic/inexpensive 15-40s do not hold up to repeated plug cycling or long periods of sustained load. An EV could be repeatedly unplugged and runs sustained load for multiple hours. A high quality outlet and a dedicated home charger probably mitigates this sufficiently.

For broad compatibility any quality charger will do. There are adapters for J1772 to Tesla and the other way too, as those are the only really utilized standards any charger will easily work with any car.

It comes down to

1) what features you want/need in a charger, for examples wifi connectivity or scheduling.

2) What your current service is, an 80 charger is probably a bad idea to use on 100 amp service.

3) How fast you think your future EV will charger, some charge no faster than the Jeep (32A) and some trucks at 80A. and

4) How quickly you need range, a truck doing slightly less than 2mi/kWh will still get over 100 miles of range added in an 8 hour overnight session on 32A. While more efficient cars (Kona/3/Y...) would be getting 200 plus under the same conditions.

Saw this one late, but really felt I needed to chime in. FL4xe is right, that is a TT30 plug, specific for the RV world, 120V 30A. It is a 50A GFCI breaker. Here is the first concern I have. Is this wired in parallel for both outlets? Because if it is just a single outlet with a 50A feed, you can cause some serious damage before the breaker trips on overcurrent, since your plug is only rated for 30A. My guess is they cheated, and put a single 50A breaker in, and used one leg for one outlet, and the other leg for the other outlet, with a common neutral. However without seeing it, I couldn't confirm that.
@brnscofrnld I think they just connected the ground to the box and didn't use the ground terminal (you can see what looks like 3 total ground wires in the picture, none going to the actual terminal), which is pretty crappy, but not illegal, since by code you are not supposed to put two wires on one screw terminal of different core sizes.

Long story longer, I think everything to the breaker is fine (if you fix the ground screw connection) and you can put a NEMA 14-50 plug in. You would need to ensure the wire core size can handle 50 Amp for the run length (I'd probably use 6 gauge myself up to about 80', but I oversize everything and the upstream breaker is rated at or below the components it is protecting, but that is it.

One more word of caution, many EVSE chargers do not like the GFCI setup. When I installed my level 2 charger, I cut the end off the charger and hardwired it so I did not need a GFCI. Most of the charger companies out there don't like selling hard wired ones because of liability, but there is no difference in the two, except for the plug on one end. Hope that helps.