abellish

I will be traveling on vacation for a few weeks leaving my car at home. What are best practices with respect to leaving the battery charged (e.g., should I leave plugged in and managed to what %)?

2KA6_2.7T

From what i can recall the owner manual stated to set target at 50% for long term unused.
Personally. for duration of less the 3/4 weeks, I would charge to 50/60 % SoC., and leave it unplugged to reduce power surge from thunder storm.
I saw no drop in SoC during the 6 days being unplugged.

Sid Monge

If your storage is longer term, you also need to put your 12-volt battery on a trickle charger. The connection posts are in a box in the back left of what used to be the engine compartment.

John (aka Daddio)

FYI - I have the same concerns when I travel for long periods of time and leave the Tron in storage. The owners manual recommends against self charging of the 12V battery. See owners manual for 12v battery

Sid Monge

I checked this out with both my dealer's e-tron service specialist and the "Audi Central" (800 number) e-tron gurus and both agreed with using a trickle charger for the 12-volt battery during 5-month storage. (Otherwise, the 12-volt will die and make it impossible to start later.)

fideba

My car was at the dealer's for 6 days (dent in the door, do not ask :-), and didn't loose a single km (or mile :-))

Rad123

I just came back from a two week vacation. When I left it was on 70% and when I came back it was on 70%.

John (aka Daddio)

FYI - the owners manual has many warnings about charging the 12v. I wonder why all the caution, if your saying the dealer was supporting a trickle charger?

BestLife9798

I so far haven't seen any battery change either when leaving it parked during vacation several times now. Longest has been 15 days.

oh0150

I believe when Audi and others recommend the use of a “trickle” charger they really mean use a specially designed battery maintainer that keeps the 12v battery at a near-fully charged state. They sense voltage drop and “top-up” the battery as needed. Whenever I travel and my cars are idle for 3 weeks or more, they are connected to one of my Battery Tender(tm) devices. I have a BMW convertible that I rarely drive and it will stay connected for months at a time before I take it out for some exercise. We off in a month or so on a longish trip so the e tron will be among the cars so connected. They are hardwired with a female plug. I don’t have to hassle with alligator clips. No, I haven’t checked on how to hardwire the e tron as yet but will shortly.