Just came back from a trip to my family’s vacation house up in Cape Cod MA. There are three superchargers planned for Cape Cod in the near future, but as far as I know construction has not started on any of them. Since the closest supercharger was a 45 minute drive away I needed to be able to charge at a decent rate at the house. Luckily the dryer at the house was switched from electric to gas at some point, so there was an unused but still active NEMA 10-30 outlet in the basement. I went on Amazon and bought myself a NEMA 10-30 to 14-50 adapter, https://www.amazon.com/dp/B06VWGVQDF/ref=cm_sw_r_cp_api_i_mK8dBb8FAM5M2, and a 30 foot NEMA 14-50 extension cord, https://www.amazon.com/dp/B0024ECIP0/ref=cm_sw_r_cp_api_i_WL8dBb3Z0N6AN. This solution worked out very well. Obviously I had to bump the amps down to 24 since I was charging from a 30 amp circuit. This is very important since I had the 14-50 adapter plugged into my UMC, so my Model 3 assumed it could go the full 32 amps. With the max draw at 24 amps I was able to get 23 miles per hour of charge. Roughly half of the charge rate I get at home with my wall connector. Eventually I’d like to install an actual 14-50 outlet so I can get the full charge rate out of my UMC. Here’s some photos for any that are looking to implement a similar solution.