ummm..... 8 AWG ???In preparation for my Model Y that's expected to arrive in March, I installed a NEMA 14-50 outlet in the garage for the Mobile Connector this afternoon. Total cost was less than $100 for the breaker, box, mud ring, outlet, 3/4" flex conduit, fittings, bushings, SS cover, and 8 AWG THWN-2 wire. I now only have 2 out 40 slots left In my panel.
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#8 THHN is rated for up to 55A, is acceptable for a 50A circuit. 40A is the maximum allowed amperage draw for EV charging using a 240V/50A circuit (using the 80% rule). The Tesla Gen2 Mobile Connector with 14-50 plug adapter maximum amperage is 32A further reducing the maximum amperage by 20% below the 40A maximum for the circuit.
Going to 6 AWG is no problem, but 80% of 55 amps = 44 amps. The Mobile Connector is only 32 amps and I'm not aware of any 14-50 EV "charger" that is more than 40 amps. Am I missing something?
I have both a Wall Connector and Mobile Connector, exactly because I want to keep the Mobile Connector in the vehicle whenever I take the vehicle somewhere. You never know when you might want to have it. Last time this happened: showed up with around 6% SoC and couldn't get a EVSE at the airport parking garage, but there were outlets available.
At a huge cost (10-20%) in charging overhead.
$288-576 over 8 years of ownership, assuming electric rates don't rise (which they probably will).That would amount to $3 to $6 per month based on how much I drive and pay for electricity.
In the OP's first post, they state they used 3/4" flex conduit.
With a few rare exceptions and before the automotive market changed dramatically a couple of years ago, I historically have averaged trading vehicles about once per year, so I'd be very surprised if I kept the Model Y that long. I may have bought my last gasoline-powered vehicle, though. I'll be parting with a Honda Ridgeline - a vehicle I've been fond enough of over the years to have owned six of them - for the Model Y, so we'll see if/how this works out.
