interesting. What is your charging practice? Do you believe in more Shallow micro charges or less frequent charges where u let the battery fall to 20-25% and then recharge?
Hello. I’m a new member and just leased my Audi 2021 E-Tron last week.
80% or less is better for the battery. This graph comes from a paper on a Li-ion battery that was leading edge in 2012... I'd expect that today's batteries are better. Also at 35C, and hotter makes batteries wear out faster, and your batteries will be cooler. And at 1C charge/discharge rate. Or quick charge followed by BOH driving. Full equivalent cycle is 0-100%, or ten times 45% to 55% or similar.
I am new the to group. I have a 2021 Prestige (3 days old). I will have an 80 mile round trip commute every other day. Would folks be of the opinion that I top it off? Getting to my level 2 charger in the back of my house is a hassle, as I live in the city. I'd like to just top it off and park on the street half the time. Thoughts?
Congratulations on your Audi Prestige! I'm assuming your are in DC? In the summer you'd be working with close to the 230 max range EPA at 100% charge. If you charge to 80% max charge for everyday use as recommended by Audi, you are talking 184mi. Factor in miles lost due to A/C, driving style, etc, you would probably get one 80 mi trip out of a single 80% charge. Note that in the winter, your might lose 15% or so of battery capacity. That still works, but cuts your margin a bit. So, it looks like you'd need to make your way to your L2 charger every other day. The Audi does not suffer from any "phantom drain". That is, what you put into the battery stays there until you take it out, so charging it and then parking it on the street would not be a problem (well, except that it IS DC. My son lives there so I know what that can mean!) Will you need to reserve another 20 mi or so just for driving around to find a parking spot?
Thanks for addressing my question. To be clear round trip is 80 miles. Are you saying that 80% charge will use all of it with AC running? My L2 charger was installed today. I am getting 23mph on it. I think that is decent.
No, it won't use all of it, but at 80% max charge you probably won't have enough capacity to do two 80 mile trips between charges. The car will start giving you alerts about a low battery at around 25% remaining capacity. At that point it will also start shutting down non-essential functions that are contributing to the battery drain.
Got it. I agree. It won't be enough on 80%. I think that commute would require a 100% charge. I'll keep everyone updated.
One thing you might consider, depending on how your 'real life driving experience" plays out, the "80%" upper limit on everyday charging, was set to protect the battery primarily during L3, HVDC charging. HVDC charging is probably the worst thing you can do to an EV battery. L2 is not nearly as demanding. It's interesting that, for Audi, that limit is also where the "high constant charging" rate starts to drop for the Etron during HVDC charging. It takes a lot more time to try to jam more electrons into the battery for that last 20%, so timewise 80% is a good place to stop. It is likely that for L2 charging, going to 100% probably would not cause any noticeable problems for years. Also, for the 2019 E tron, Audi actually blocked off the lower 8% (meaning "zero" to you is actually 8% left) and upper 4% ("100%" to you is actually 96% of the true maximum). Audi backed those padding numbers off a bit for 2021's, I think, but there is still some safety padding built in. Bumping your charging max up to even 90% could give you an extra 20 mi, or so.
