Sure, if you’re a certified electrician, you can install one yourself. When dealing with 240 volt, 50 amp circuits, it’s best not to fool around. There are plenty of electricians who can do this for you. How much it will cost depends on many factors, including whether your existing house panel has capacity for an additional circuit, how far said panel is from where the outlet is going to be, and perhaps even whether or not you mention Tesla when asking for a quote. Expect the ballpark of $1,000 plus or minus a few hundred.
The electricians that have gotten good reviews from the community are listed below. Note that Tesla Owners Club of Maryland does not offer any endorsement by mentioning these vendors. Other members have recommended them, your experiences may vary. Be sure to check out the FAQ on member benefits, as some of these recommendations also show up there.
- HavePower Electric, https://www.havepower.com
- Sean Ryan, firstname.lastname@example.org, 301-509-9832
- Taylor Electric, 410-977-6396
- James at 617-733-1156, https://www.interconnectelectric.com/
- Mattingly Electric, http://www.mattinglyelectrical.com/
Also note that you may be eligible for some rebates. For PEPCO customers, check out https://www.pepco.com/SmartEnergy/InnovationTechnology/Pages/Residential-Charger-Rebate.aspx. Also refer to the FAQ about rebates.