Does the PHEV system charge the 12V battery?

[NJRonbo]

I sit here amazed that battery failure is something that needs to be worried about with the GT model.

Have owned my GT for 9 months. I use PURE EV mode almost exclusively. I rarely use the ICE, though it has kicked in from time to time.

I don't know how much danger I am in to one day starting the engine and finding out it won't due to a dead battery.

I do have a trickle charger though I have yet to use it. Should I start?

And which battery? At first, I thought the emphasis was on the battery in the trunk under the spare tire. That is what Heyward was charging. Now he doesn't do that anymore and TxTom is saying to trickle charge the ICE battery under the front hood.

 

[mfjj]

I sit here amazed that battery failure is something that needs to be worried about with the GT model.

Have owned my GT for 9 months. I use PURE EV mode almost exclusively. I rarely use the ICE, though it has kicked in from time to time.

I don't know how much danger I am in to one day starting the engine and finding out it won't due to a dead battery.

I do have a trickle charger though I have yet to use it. Should I start?

And which battery? At first, I thought the emphasis was on the battery in the trunk under the spare tire. That is what Heyward was charging. Now he doesn't do that anymore and TxTom is saying to trickle charge the ICE battery under the front hood.

The high-voltage battery will charge the 12V battery when the car is on. No actual driving is needed, let alone ICE driving. You do need some charge in the 12V battery to turn on the car in the first place (but nothing like the cranking power required for ICE cars), so you'll need a jumpstart if the 12V battery is completely dead. As with most cars that have the 12V battery in the rear, there are jumpstart access points under the hood.

This is what I do with my 2017 Fusion Energi that's now sitting in the garage for weeks on end: I leave the charger on, and remote-start the car once a week. The car shuts itself down automatically after 30 minutes, and that's enough to maintain the 12V battery. Ironically, I can't do this with my 2022 Corsair GT. Sometimes (probably only in the winter), the GT will engage the ICE even when the charger is on and the battery is full, resulting in an exhaust-filled garage. This never happens with the Fusion Energi. When I start going on long trips I will have to use a trickle charger for the GT.

 

[SOB]

Yeah, the converter is supposed to charge the 12 volt battery. I stopped using the trickle charger months ago after discovering the documentation on keeping the battery charged properly. If you are getting low battery, I'd suggest getting it to the dealer as you might have a faulty 12 volt battery. I have left my trickle charger cables hooked up so if I want to check the condition of the battery, I don't have to remove the tire or any of the layers of covers off. I just hook up my battery to the special cable and I can recondition and check the battery at times.

When I first picked up my 2022 Aviator BL GT last May I read about how your situation is very similar to mine and have mine set up just like you did. I assumed that when you refer to your "trickle charger" you really mean "battery Tender" because that's what I have used. I attached a special cord to the 12v battery permanently and have it tucked in under the windshield wipers on the drivers side allowing me to plug it in without having to open the hood. It has really been working great for me and has the added benefit that if I ever had to jump start it I just plug my battery Jump start pack at the same point again without opening the hood.
I notice that every time it's plugged in that it definitely does quite a bit of charging. So even though I read the same info you did I keep on plugging it in.

 

[kingdre]

The high-voltage battery will charge the 12V battery when the car is on. No actual driving is needed, let alone ICE driving. You do need some charge in the 12V battery to turn on the car in the first place (but nothing like the cranking power required for ICE cars), so you'll need a jumpstart if the 12V battery is completely dead. As with most cars that have the 12V battery in the rear, there are jumpstart access points under the hood.

This is what I do with my 2017 Fusion Energi that's now sitting in the garage for weeks on end: I leave the charger on, and remote-start the car once a week. The car shuts itself down automatically after 30 minutes, and that's enough to maintain the 12V battery. Ironically, I can't do this with my 2022 Corsair GT. Sometimes (probably only in the winter), the GT will engage the ICE even when the charger is on and the battery is full, resulting in an exhaust-filled garage. This never happens with the Fusion Energi. When I start going on long trips I will have to use a trickle charger for the GT.

How come that doesnt work with the GT?

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[TxTom]

I sit here amazed that battery failure is something that needs to be worried about with the GT model.

Have owned my GT for 9 months. I use PURE EV mode almost exclusively. I rarely use the ICE, though it has kicked in from time to time.

I don't know how much danger I am in to one day starting the engine and finding out it won't due to a dead battery.

I do have a trickle charger though I have yet to use it. Should I start?

And which battery? At first, I thought the emphasis was on the battery in the trunk under the spare tire. That is what Heyward was charging. Now he doesn't do that anymore and TxTom is saying to trickle charge the ICE battery under the front hood.

I was pointing out that you don't have to remove the spare tire to attach a trickle charger. The access points under the hood provide a convenient way to easily attach a trickle charger (Battery Tender) that actually charges the 12V battery.

 

[NJRonbo]

I was pointing out that you don't have to remove the spare tire to attach a trickle charger. The access points under the hood provide a convenient way to easily attach a trickle charger (Battery Tender) that actually charges the 12V battery.

Thanks, Tom!

Okay, so you would recommend, as a GT owner, that I connect a trickle charger to the battery under my hood. That should prevent my battery from going into the dreaded sleep mode, correct?

I am going to reference the instructions that you referenced in an earlier post.

 

[TxTom]

Thanks, Tom!

Okay, so you would recommend, as a GT owner, that I connect a trickle charger to the battery under my hood. That should prevent my battery from going into the dreaded sleep mode, correct?

I am going to reference the instructions that you referenced in an earlier post.

Yes, I would once every week or so, hook up. The fact that it charges for several hours tells me it is doing some good. FYI, I got in the habit when I had my 2021 Mach-E. Initially, owners had problems with the 12V battery not being charged by the EV battery, and the early cars were going dead. Ford quickly did a software update to fix the issue. In fact, mine was stuck for 2 weeks in Kansas City where all the Mach-Es were initially transported, awaiting the update. I also charge my wife's 2021 Ford Escape Titanium PHEV this same way.

 

[mfjj]

How come that doesnt work with the GT?

It works as far as maintaining the 12V battery is concerned, but I can't do the exact same trick as I do with the Fusion Energi because... "Sometimes (probably only in the winter), the GT will engage the ICE even when the charger is on and the battery is full, resulting in an exhaust-filled garage. This never happens with the Fusion Energi."

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