If the wire is #8 romex you have a 40 amp circuit max, if it is #6 romex you can go to 50 amps.
Since the wiring includes a neutral you can use a 14-50 outlet and use the mobile connector.
- If you have to stick with a 40 amp circuit be sure to label the oulet as 40 amps.
- You will want a commercial grade outlet, $50-80
- You will need to replace the circuit breaker with a GFCI breaker, $100-150
- You will have to buy the Tesla 14-50 adapter, $45
- Your charge rate will be 32 amps irrespective of the whether you use a 40 amp or 50 amp circuit, the mobile connector is limited to a charge rate of 32 amps
- The cost for the outlet, GFIC breaker, adapter and some sort of cable management system will be about $225-300, plus installation if you hire it out.
You can also install the wall connector
- If you go with a 40 amp circuit your charge rate will be 32 amps, if you can go with a 50 amp circuit you will get a charge rate of 40 amps
- You get to keep the mobile connector in the car so it is not forgotten when needed!
- The wall connector is $495 (plus installation) and you can keep the breaker you have, If you are able to go with a 50 amp circuit a new breaker will run you about $10.