12 Volt battery?

[dww]

This is probably obvious but I could not find it......we will be away from our 2022 Mach E for 2 to 2.5 months to warmer weather. How does the 12V battery stay charged and is there anything I can do remotely to keep it charged?
Thanks

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[hybrid2bev]

This is probably obvious but I could not find it......we will be away from our 2022 Mach E for 2 to 2.5 months to warmer weather. How does the 12V battery stay charged and is there anything I can do remotely to keep it charged?
Thanks

See the manual.

>30 days of storage Ford recommends disconnecting the 12v.

 

[dww]

Thanks.....I'll look in the manual. I've done 6 weeks with no issues

 

[ATL]

In the event of a long storage period, the car will "go to sleep" and you'll no longer be able to interact with it via Ford Pass, but the HVB will keep the LVB sufficiently charged so that when you return it will start up just fine.

Leave it at a fairly high SOC initially...say 85% and you'll be good.

 

[generaltso]

In the event of a long storage period, the car will "go to sleep" and you'll no longer be able to interact with it via Ford Pass, but the HVB will keep the LVB sufficiently charged so that when you return it will start up just fine.

Leave it at a fairly high SOC initially...say 85% and you'll be good.

That's not at all what the manual says to do.

 

[ATL]

That's not at all what the manual says to do.

Agreed, but I have done this for a couple of months myself with no major or obvious deleterious effects on the LVB.

I'm not saying to do this on a frequent cycle but it's unlikely someone would own a car if all they ever did was kept it in storage! ?

 

[generaltso]

Agreed, but I have done this for a couple of months myself with no major or obvious deleterious effects on the LVB.

I'm not saying to do this on a frequent cycle but it's unlikely someone would own a car if all they ever did was kept it in storage! ?

If it will be in storage for months, the HVB should be kept closer to 50%. And once the car goes into deep sleep, it's not going to wake up to top off the LVB. So I'm not sure I'd be suggesting that advice over what Ford says to do.

 

[noway]

Dispite what most answering this is going to say, it will be fine. It will be recharged automatically whenever necessary. There are cases of misbehavour and defective components, but those are rare compared to all working perfectly fine

 

[ATL]

If it will be in storage for months, the HVB should be kept closer to 50%. And once the car goes into deep sleep, it's not going to wake up to top off the LVB. So I'm not sure I'd be suggesting that advice over what Ford says to do.

I haven't seen anything in the forum about how many top-ups of the LVB it would take to lower the HVB dangerously. Hmmm.

It wasn't my experience but if sleeping truly disables that feature of charging the LVB prior to it going so dead as to require a boost, then I would rescind my comment.

 

[Mach-Lee]

I haven't seen anything in the forum about how many top-ups of the LVB it would take to lower the HVB dangerously. Hmmm.

It wasn't my experience but if sleeping truly disables that feature of charging the LVB prior to it going so dead as to require a boost, then I would rescind my comment.

One LVB top-up takes about 0.5% of the big battery. So it can handle a lot.

Car will probably go to sleep on timer after two weeks though.

 

[Beewize2]

Question: Does it make sense to leave the frunk unlacthed in case you need to charge the 12v? Only if it's in a garage and safely parked. I'm a new owner and just wondering.

 

[RickMachE]

Question: Does it make sense to leave the frunk unlacthed in case you need to charge the 12v? Only if it's in a garage and safely parked. I'm a new owner and just wondering.

If you have a 12v source, and can access the front bumper to pop the frunk (if the 12v goes dead), then no.

If I was going to leave mine for months, I'd lower it to 50%, not plug it in, and put the 12v on a battery tender, connected.

 

[MustangBarry]

So if I'm going to be away for more than two weeks couldn't I just do a lock/unlock sequence via Ford Pass every few days to keep the car from "going to sleep"?

 

[RickMachE]

So if I'm going to be away for more than two weeks couldn't I just do a lock/unlock sequence via Ford Pass every few days to keep the car from "going to sleep"?

If you want to drain the 12v battery, sure.

 

[Adventureboy]

Your MME will charge the 12v battery from the HVB periodically to maintain it. This uses a bit of SOC from the HVB but it is a small amount and will only drop a few percent. The only exception is if you have a very cold snap and your MME tries to keep the HVB battery warm - it will use more HVB SOC then. You probably have little to no risk in Vancouver of getting cold enough to have a substantial effect.

For 2.5 months, I'd follow the manual leave the HVB SOC around 50% +/- 10%, and disconnect the 12v battery. I'd also put an AGM battery maintainer on the 12v to keep it healthy, or at least make sure the 12v is fully charged before disconnecting it (ie, drive for an hour, then disconnect immediately when you get home so the 12v doesn't have time to drain any)

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