Can I unplug 12 volt battery for a week?

[sorka]

I'm not going to be driving my car for a week. Is there any issue with leaving the 12 volt disconnected for that long?

Are there any scenarios where bad EEMC^2 would surface after a disconnect that wouldn't necessary show if you were just rebooting? Any difference in unplugging for a few minutes like when changing the 12 volt vs leaving it disconnected for days?

 

[ewoodrick]

Doesn't sound like something that I'd try.

 

[doghousePVD]

Why bother disconnecting if only gone for a week? A few months, OK, but just a week?

 

[sorka]

We'll see what happens. It's already done.

 

[doghousePVD]

Let us know what you learn.

 

[ucmndd]

Interesting experiment, but I’m left wondering what the purpose is.

 

[Tam]

Interesting experiment, but I’m left wondering what the purpose is.

To prevent vampire drain from all those electronics and internet access with the mothership.

 

[ucmndd]

To prevent vampire drain from all those electronics and internet access with the mothership.

For a week? Nah. That’s just silly. I recently left my car at the airport unplugged for 10 days. Parked with 80% charge, returned with 74%.

 

[.jg.]

I'm not going to be driving my car for a week. Is there any issue with leaving the 12 volt disconnected for that long?

Do you mean you intend to disconnect the 12V battery from the car or just that the car won't be plugged into any charger for a week? Disconnecting the 12V is not recommended, except when someone is working on a car. If leaving the car not charged for a week or more, ensure that the main battery has a reasonably high state of charge when parked e.g. 80% - 90%. The car will turn on power convertors every so often, to top up the 12V battery from the main battery pack.

 

[sorka]

Interesting experiment, but I’m left wondering what the purpose is.

My bill WiFi hotspot on the car won't last that long on battery and I don't want my car inadvertantly downloading v10 since I'm quite happy with V8.

 

[sorka]

Disconnecting the 12V is not recommended, except when someone is working on a car. If leaving the car not charged for a week or more, ensure that the main battery has a reasonably high state of charge when parked e.g. 80% - 90%. The car will turn on power convertors every so often, to top up the 12V battery from the main battery pack.

It will do no such thing with the 12 volt disconnected.

 

[sorka]

So the answer is yes it's ok to do.

Unplugged 12 volt with 31% for 8 days. When I reconnected, the battery still had 31%.

 

[rowdy]

Interesting. I wonder if just pulling the First responder loop is enough. Getting access to the 12V battery is a pain.

 

[Lasttoy]

First I cant believe you took the cowling out to get to the battery. I'm had o do it last Sunday while broke in NC.
Second, page from manual.

 

[sorka]

Interesting. I wonder if just pulling the First responder loop is enough. Getting access to the 12V battery is a pain.

Won't that still leave the MCU powered by the 12 volt battery?

Any ways, on the 2015 it only takes two minutes to get to the 12 volt battery be and disconnect it. It's right behind the frunk tub.

 

[Voolare]

unplugging the safety loop is much faster and convenient ton disconnect the 12v! I must disconnect it now because my 12v is low and I'm leaving for 8 days (marked for service when back)