We had two options for getting 2 NEMA 14-50 circuits installed for our new Model S in Wisconsin.
Our electrical panel is in our basement, in a finished area of a room. To pull the cable, the electrician had to cut two holes in the drywall, make a few holes in the ceiling, and then pull the cable to our garage, that is also finished (drywalled, insulated, and painted). In the garage, we opted for a surface mount, with the cable in metal conduit. That terminated at a 240V plug (for future use), and the electrician installed a Tesla wall connector.Total cable length is about 70 foot for each run.
We had two estimates, one from a local Tesla trained electrician and another licensed electrician we've for other projects. The estimates were both within $50 and in the end we paid the Tesla trained electrician to do the work for $1950.
The option we selected for pulling the cable was completely an indoor route. However, our second option was to route the electrical cable through conduit outside the house. There weren't any issues with that other than it meant a few holes would need to be drilled to the outside of the house. (And the other issue was the day they were scheduled to do the work, the
high temperature was going to be -12F).
And we also have 34 solar panels that use conduit outside the house to feed DC power. The electrician painted the conduit to match the house, so it doesn't stand out and looks fine. But, depending on your situation, conduit (and painting it) may not be a great option.
So, while I'm a long way from being a licensed electrician, depending on your local electrical code, it seems likely that you could route the electric cabling outside.
Also, we checked with an electrician
BEFORE we put a deposit on our car to make sure we weren't going to run into any issues.
Best advice: call an electrician for an estimate. It may not be as simple as pulling new cable. You may need upgraded panels, service, etc.
Check to see if there's a local Tesla expert
here.