I’m sure you know this but the continuous load you run can only be a maximum of 80% of the amperage of the breaker; in your case you need to set your EVSE to 32A if your breaker is 40A. Also, make sure your wire gauge is adequate for the continuous load you’re running.

 

Yes, exactly, that's why I mentioned to check the wiring and breaker.

 

If you have #8 wire on the outlet then you can either get a 50 Amp breaker of get a 40 Amp breaker rated for 100% continueous duty. There are some brakers rated for 100% continueous duty.
I doubt you will notice the difference between 33 or 40 Amp charging.

 

Thanks for the tip. I'll be running new 6ga wiring this weekend for my new 48A Autel (dialed down to 40A), on a 50A breaker (80% rule). It's an easy run for me, about 12" outside of the main panel on in the garage. Still thinking about whether to hardwire, or put on a nema 14-50 plug. I did buy the EV rated nema plug.

I'll likely just add the 40A charger on a new circuit and keep the 16A charger next to it. Most days the 16A charger will be sufficient for my charging needs and I can recharge more slowly overnight (easier on the battery), saving the 40A charge for those occasional weekends when I'm in and out of the house more and might need a faster recharge.

 

Really no difference in battery longevity between 16a and 40a. They are still a trickle charge for a battery this large.

40a will be cheaper on your power bill. The cooling fans and onboard charger have the same loss at 16a or 40a. Might as well minimize those losses by reducing the charging time with the 40a rate.

 

Okay, emergency unplanned trip to drop my mother off to my sister for a while. Had to learn the DC charging on the fly, and wound up using EA for my charge sessions and was impressed with how easy it was once I figured out the app.

My initial impressions:

1. Google navigation sucks as far as EV planning. Plugshare showed me EA stations that Google couldn't. Before using Plugshare I almost drove the ICE vehicle tonight.
2. I used Plugshare to plan my trip, but used the EA app to pay for the charge. Plugshare wouldn't allow me to start the charge at the EA stations.
3. No waiting any the three EA stations I used tonight. One of them was located in the same mall as a Tesla supercharger station, the Tesla station had a line of cars waiting for a turn, a few cars deep. The EA station was me and a BMW that showed up as I was wrapping up, no waiting.
4. EA seems the way to go. EVGo and Chargepoint had slower stations on my route and EVGo had less stations and bad reviews. I used Chargepoint at work on my old EV, but it's not as practical for the Audi.
5. As fast as the charging is, it is expensive. A charge that I can do at home in about 5 hours for $4.80, cost me $27.78 at the EA charger, but it did charge me the same 48 kwh that I get at home in only 21 minutes.

I stopped to charge 3 times in 250 miles round trip. First was just to make sure I could charge close to home and not find out I had an issue 120 miles away. I also planned to have about 50 miles remaining, in case I wound up at a closed or broken station. Maybe overkill, but it worked out well as far as getting out to stretch and get a snack and drink, and for my peace of mind being a newb at the public charging. I do miss that aspect of the PHEV that I came from.

My 92 year-old mother also approves of the e-tron. It was her first ride in it since I picked it up a little over a week ago. She likes it better than my Cadillac ELR that the Audi replaced.

 

I would also recommend using https://abetterrouteplanner.com/ for trip planning. There you can add your preferred charging provider(s), and specify if you like to use them exclusively in the planning, or as the preferred network as long as they anyhow are somewhat along the optimal route. And a lot of other possible settings - even in the subscription free version, like minimum number of chargers at a location. If you have an OBD2 plug reader, you can also get live battery status (incl temperature) and it will adjust the route plan during driving if it sees that your speed/consumption deviates from the initial plan.