I had a NEMA 14-50 outlet installed when I first got a Model S back in 2013 - I think it cost about $400 for installation, which was probably a rip-off since it is right next to the breaker panel in the garage. I charge the S using that, set to 30 amp, because I don't need to charge at max speed and the cable stays cooler that way. My wife got a Model 3 in January and we just charge that on a 115 V outlet, which has been perfectly adequate for the amount of driving she does. Her UMC stays plugged into the 115 V outlet.
I used to carry the UMC with me on long road trips in the first couple of years when Superchargers were few and far between, and actually used it a few times, in 115 V outlets or at an RV park. The last couple of years I usually haven't bothered carrying it on road trips unless I am aware of a specific need - like last year I drove from Binghampton, NY to Erie, PA before the Erwin, NY SpC opened. We were staying overnight at a hotel in Alfred, NY. I needed to add some range to be able to make it to Erie, and as it turned out, the hotel had a 115 V outlet near the kitchen entrance which they let me use. If that hadn't worked out, there were some Level 2 chargers in various towns on the way (which wouldn't have needed the UMC, just the J1772 adapter.)
Otherwise, I never carry the UMC, it just stays plugged into the NEMA 14-50. The idea of unplugging it every day and carrying it back and forward sounds unappealing.
I've driven about 127,500 Model S miles, a large part of that on road trips around the US & Canada.
I used to carry the UMC with me on long road trips in the first couple of years when Superchargers were few and far between, and actually used it a few times, in 115 V outlets or at an RV park. The last couple of years I usually haven't bothered carrying it on road trips unless I am aware of a specific need - like last year I drove from Binghampton, NY to Erie, PA before the Erwin, NY SpC opened. We were staying overnight at a hotel in Alfred, NY. I needed to add some range to be able to make it to Erie, and as it turned out, the hotel had a 115 V outlet near the kitchen entrance which they let me use. If that hadn't worked out, there were some Level 2 chargers in various towns on the way (which wouldn't have needed the UMC, just the J1772 adapter.)
Otherwise, I never carry the UMC, it just stays plugged into the NEMA 14-50. The idea of unplugging it every day and carrying it back and forward sounds unappealing.
I've driven about 127,500 Model S miles, a large part of that on road trips around the US & Canada.