Just noticed that my garage door opener is plugged into a 6-20 outlet in the ceiling. I visit relatives and charge on the standard wall plug in their garage over the weekend on my Model 3 at about 3 mph of range. If I got the 6-20 adapter, I could unplug the garage door opener and use that outlet and charge at 15 mph instead Just need to make sure that the weight of the charger wouldn't pull the plug out of the outlet causing it to fall on the car.