So my dad has a Nema 6-20 220V outlet in his workshop that is accessible easily via a garage door. I don't think there will be a 6-20 adapter for the Model S anytime soon, and even if there was, drawing 20 amps (if that is even possible..probably just 16 continuous I'd guess) wouldn't do much for charging. They live about 120 miles from me, so a single charge round trip is theoretically possible, any local driving and the realities of the roads and speeds mean it would be a bit marginal. Anyway, I found the following pieces that I'm thinking will make charging there somewhat practical.... First I found this adapter from the 6-20 to a 6-30 outlet (obviously still only able to pull 20 amps): Amazon.com: 6-20P to L6-30R Power Cord Plug Adapter: Home Improvement I think that, combined with this cool device with a NEMA 14-50 female connector that will allow me to draw from both the 20amp/240V line and a standard 15 amp/120V at the same time for a combined 30amps which will allow me to charge at around 20 miles of range per hour connected to the standard Tesla EVSE. Camco 55025 RV Power Grip Maximizer 45 Amp Adapter : Amazon.com : Automotive I'll need this little adapter too to get from the 6-30 to a standard RV type 30amp plug on the splicer gizmo: Amazon.com: Camco 55333 RV 30 Amp Generator Adapter: Automotive A lot of pieces, but I suspect I'll be able to use most of them elsewhere at times too. That first piece is the most painful, at $40 it was $24 cheaper than the next least expensive I could find.