2021 e tron prestige
47k miles

traveling from northern CA to southern
roughly 500 miles
using EA fast charging

i charge at home with a 7.7-8.8 kWh charger. I get about 190-180 miles on a full charge to 100%

starting the drive I put in my first destination roughly 130 miles away into the navigation system. My range goes down to 160-170 turn on ac or heater the range goes down to 140-150.

after the first super charge up to 100% my range is only at 160-170. Out in destination and turn in ac or heater and I’m down to 130-140 range.

I have called Audi customer service and talked to the e tron team and I will bebringing my car in at the next available time (April 28th) to get this further diagnosed.

I know fast charging will get me less range but 40-80 from the epa 222 it’s pretty big difference.

I drive fast most of the time 80-90 mph
my fiancé drives 70-80 mph no difference

I know the e tron tech said it’s standard to fluctuate 20-30 miles from the 222 epa

just wanted to share

 

A couple of things here and I do not have as much experience as some on the board. Perhaps @WetEV will chime in.

But first it sounds like you are saying that once the pack is warmed up and you are charging on the road the car is only charging to 160 GOM miles or so at 100%. That IS a problem and you should get it checked out regardless of how the car is driven (UNLESS the temps are extremely cold)

1. I have never seen my range take a dive that much by simply turning on heat or AC. Mind you, mine is always on, so maybe the GOM has already factored it in.
2. In my '19 at 80% I get 160ish in the mid Atlantic cold. When I precondition and/or it is a bit warmer it reflects 170ish.
3. When on a road trip, it never occurred to me that fast charging was giving me less road range. I charge to 100% and I always felt that the extra charge gave me the extra 20% of range with a consistent 200ish miles. The biggest factor being temp. I had a VERY long road trip in teens temperatures and at 100% I was getting 170 miles but that seemed reasonable as you lose about 20% range in extreme cold. But I never blamed fast charging.
4. When on a road trip, DO NOT follow the standard EV advice of only charging to 50% because of other cars charge curves. The etron charges exceptionally fast so leave the cable in as long as you can. It will go to 90% before the curve falls off.
5. The etron does not precondition driving into a DC fast charger like most cars. But the BMS is pretty slick and it does a great job of warming the battery up once hooked up. That being said, when you hook up in extreme cold, you may get reduced (120 kW up to 50% until it shakes off the cobwebs)

My personal observation. The etron is not a hypermiling car. You get the range pretty regardless of what is going on in the cabin. Turn the heat on, turn the AC on, turn the seat warmers on, turn the seat vents on, have you kid charging their Ipad in the back, the car gets the same range. The corollary to that is that you cannot improve your range on the fly very much by turning all of that stuff off. If you think that you are going to be five miles short of your destination, turning the heat off is not going to get you there.

 

I agree, getting the car checked out by the dealer is your best bet. Indicators of battery issues can be the power meter showing less than 100% or the boost not being available when you switch to the S mode.

I also agree with the comment made about energy saving by turning secondary draws off. The heater is probably the biggest draw of energy. But it pales in comparison to propulsion. So the best way to conserve energy when you notice that you do not have enough to get to where you need to go is to slow down.

 

That's why.

 

I'd second that. High speed drastically reduces range.

You can try a little experiment before your late April appointment which may save you from having to go in. Find a route where you can drive 55 mph for a good stretch (20 miles or more), reset your trip computer before heading out, and then travel no faster than that to a charger, charge to 100%, and I'll bet you'll see your GOM jump to over 200 miles at full charge. If not, then you probably do have a battery issue.

You've put on 47k miles on a 2021 vehicle (how many months of use? 12? 16?), driving at 80-90mph, and if you've done a lot of DC fast charging at 150kW, you're also probably seeing some battery degradation of maybe 5-10%.

 

Those sweet AudiSport 21s are the problem. I took mine off and could not believe the efficiency spike at high speeds.

 

I'd have to disagree somewhat here. Accessory use is minimal compared to a speed change as far as battery draw, but it does make some difference.

The e-tron has "range mode" screen which will tell you what to do to maximize range, which includes AC/heater use. (I think if you activate it it also limits you to 55 mph max speed).

From my experience, I have a 2 mile commute to work. In sub-freezing winter temps, if I run heat in that drive I might see 1.6kWh efficiency on average. That will easily turn to 2.0kWh or higher if I leave the heat off.

 

Sounds normal to me.

Range estimate varies with driving style history and lots more. Drive like you are on autobahn, expect dramatically less range. Faster you go, shorter the range. Also add some altitude gain, cold weather and some wind, and a real world range (not a range estimate) of 120 miles or less is very possible. The range estimate is known fondly(?) as a GOM or Guess O Meter. It is trying to keep you from calling a tow truck by guessing how far you can go on the remaining charge.

GOM recalculates more after a charge, fast or not, than after just a stop. Observation, not sure of why or any details.

It is quite possible for a gas car to have dramatically less range, much much lower than EPA fuel economy. Like under a quarter of advertised. Consider a twisty mountain road. Err, don't ask me how I know about this. Same sort of factors, only different. The one number you didn't quote was the miles per kWh or kWh per 100 miles. If your energy economy was not as low as I suspect, there might be other problems. What was your energy economy?

The GOM dropping when putting a destination into the NAV is new behavior after the last update. I don't have an opinion on this yet.

I typically see far less GOM change on turning on climate control. However, the back seat climate control might be set to extremes? AC with max cold and full fan? I've got the back seat off. Try that. Unless there is someone in the back seat, you usually don't care.

Tires inflated correctly? 21 inch wheels do impact economy.

I agree.

Side issue: Seat warmers, Ipad charging and such don't matter even for hypermiling. The motor is drawing 20+kW, the seat heaters 100W the Ipad is drawing 20W, a radio a few watts average. The heater can matter some, on a cold day might be drawing a few kW. AC somewhat less, unless you have the back seat set to max cold. I've done that.

I both am not very interested in hypermiling the etron and when I've tried I did not get a drastically better economy. About the only suggestion I would give for improving range/efficiency is that the eTron will get about rated range at about 65 MPH in ideal conditions. Slightly slower will improve that a little.


Autobahn range test results:





https://nextmove.de/beitrag/autobahn...-the-ev-world/

 

Your high speed and 21-inch wheels are mostly the culprit. Going over 75mph will drastically reduce range. The larger wheels will also eat into your range.

I have a 2019 with the 21” wheels and have done the NorCal-SoCal drive along I-5 plenty of times during the summer and winter months. With the larger wheels, eco AC on (with back Ac off), and going mostly 75mph, I get a 100% range of 190-200 miles in the summer months. I recently changed out my wheels to 19-inch, and since then I’ve achieved close to 210 miles in similar condition. I haven’t done a long range commute with the recent software update since it was just released this past November, but I imagine it’ll push me closer to the 220-mile threshold.

edit: I forgot to mention that I’m mosty in the Efficiency drive mode.

 

I observe hypermiling effects all the time on a semi-regular route I follow. I purposely try to coast as much as I can, taking advantage of up and down inclines, and this route is FAR from "downhill all the way". For the last 6 miles of the trip, my GOM drops 1 mile, and sometimes stays unchanged.