My guess is that this topic has been discusses already, but I can't find it! I have a 90D Model X on order and am preparing my garage. I did not move forward with the 72 amp charger on the X opting for the standard 48 amp charger. I called my DS and he said that a NEMA 14-50 can only deliver 40 amps. This did not sound right to me and it seems like it would not take advantage of the faster on board charger the X has over the S, but what do I know so I said thanks and hung up the phone. Next I had an electrician come by and look at my breaker panel and give me a quote for the installation. He asked me if I wanted a 40 or 50 amps to the NEMA 14-50 outlet. I'd love to go with 50 amps assuming that I would be able to charge 20% faster. Is this the correct thing to do or was my DS correct?