It would depend on the voltage sag.
^^^ THIS.
It all depends on the quality of the electricity to the socket due to various factors like voltage drop. For me, my garage is on the opposite side of the house of my circuit breaker. The length of the circuit to the socket is so long that I get a "extension cord detected" warning pop up and it fails to charge at all at 9,10,11, & 12 amps. Only when I dial it down to 8amps will it actually successfully charge at 2mph. So 10 hours overnight only nets me 20 miles. (obviously I dont use this, I only did that for a few days when I first bought the car before I ran a 50amp breaker , 120ft of 6/3 cable to a NEMA 14-50.
this goes to show you can't count on the quality of the electricity of a random socket to get you anything decent. another thing to consider is that you don't know what other outlets are on that circuit and what other devices are pulling electricity on it. somebody could have a computer or a tv or mini heater or something on the same circuit thus reducing the amount of power you can pull (you might trip the breaker here too).
so you need to have a backup plan. there are a few options.
1) like others said try to carry about a 5-20 adapter too, this will help some if you can find a 20amp outlet instead of 15amp
2) carry around a NEMA 14-50 extension cord (I got one off amazon, its like $100) (thus using the Tesla 14-50 adapter to plug into the extension cord) and a bunch of aftermarket adapters (evseadapters.com) to 10-30 (older dryer outlet), 14-30 (newer dryer outlet and cooking ranges), 6-20 (unusual in household, but my parking garages has one of these for electric vehicles), TT-30 (RV parks), etc. in these cases using these aftermarket adapters, the car will try to pull 40 amps since your using the 14-50 adapter so you need to dial down the amps properly BEFORE plugging in. 10-30, 14-30, TT-30 -> 24 amps. 6-20-> 16 amps.
3) get a quick220. if you can find two 5-15s or two 5-20s close together on different circuits this device will convert 120V to 220V thus doubling your charge rate. i don't have one of these but I know others owners do. I'm not sure what tesla adapter you use for these , i'm assuming you cant use the NEMA 5-15 or 5-20 adapters and i'm guessing the aftermarket NEMA14-50 to 6-15 or 6-20 as above? others can weigh in here to say exactly how they do this.
4) plugshare. other EV owners are usually VERY helpful to let fellow EV owners charge at their house. I've even had people offer to me their own cars or to chauffeur me back and forth from wherever their house to to where I needed to go while my car is charging. additionaly, many commercial businesses offer free charging and list their places on plugshare. I've found free chargepoint stations at Chili's restaurants and and free ClipperCreek J1772 stations at state colleges on here.
5) chargepoint. commercial EV charging network. there are quite a lot of chargepoints now. use free mobile app or website to find nearby station. You need a chargepoint card BUT I think you might be able to call an 800 number and give them CC # over the phone and their activate the station remotely.
6) charge at RV parks. pay $9.99 to get 'Allstay Camp & RV' app on your mobile phone (this app is definitely worth the $10). this is a fabulous app that shows all the RV parks in the country and all their amenities and phone numbers etc and you can filter by nearby parks that have NEMA 14-50 adapters and then you can call one to ask if you can charge there. most are very friendly to EVs. its really no different than an RV parking there because RVs use 14-50s for their power too. some parks will only have the older TT-30 plugs so if you can't find one with a 14-50 that's why the TT-30 adapter I talked about above is useful. you will probably have to pay a small fee for the spot to charge the car.
7) dealerships. you can find these stations on plugshare. I believe Nissan has been very friendly to let Tesla owners charge for free on their J1772 stations at their dealerships. the only problem with this though is that you typically can only do this during business hours when their open.
good luck.
