We are getting the Nema 14-50 outlet installed before our delivery date which is schedule on 9-30-18. So, I called an Trout Electric to come by for a estimate. This electrician was recommended though the Tesla website and had great reviews on Yelp. The estimate came out to be $965 and includes your electric permit through your local city. Your price may vary due to each city has different fees for permits. Keep in mind that having a permit can increase the value of your home by listing your home as electric vehicle ready. They did a really good job on the installation of the Nema 14-50. I was very impressed how quickly they did the installation. Took about 40 minutes and off they went. Now I just have to wait for our Model 3 dual motor to drive in and get charging. Here's the links from Tesla that will help find an electrician around your area and more information about the mobile connector. https://www.tesla.com/support/find-electrician https://www.tesla.com/support/home-charging-installation/mobile-connector Here's the website link to the electrician we hired to install the Nema 14-50 outlet. http://www.troutelectriccoronaca.com/ Giving a $100 Supercharging Credit!!! Tesla Model S, Model X, and Performance Model 3 Use my referral code https://ts.la/linh37954