Deep Sleep FIX - Maverick Hybrid 12V battery - One Year Update

[MakinDoForNow]

It is entirely possible the key was not out when I was opening the door probably rushing. And opened while removing the key I thought I had the key out but I must have been mistaken. I have a 24, no recalls done.
XLT, so the key goes in ignition. I will have to mess with it to get it to happen again, has happened a few times randomly but most likely it was operator error. It seems random but maybe the key is not all the way out when I open the door sometimes, I gotta slow down.

Yep most likely key not all way out.

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[MakinDoForNow]

This is the status a few hours after taking the truck for its first decent run since changing the battery from the OEM battery to an AGM. I have not changed anything using FORScan. I am not sure why it is showing 97% if the BMS maxes out at 80%. Maybe it’s because the BMS was just reset and is relearning or more likely the BMS uses a different way to estimate the SoC compared to the app I am using.

So it's been a few hours since truck was "started"?
Also is your app checking for AGM soc or a standard flooded battery?

 

[johnDeere]

Well here is my story.
New to me 2023 maverick hybrid XLT. with 11,000 miles on it now . I purchased it on 12-27-2024 with 9,000 miles on it.
So I do not have a good history of what happened before I purchased it.
I was reading about all this issue with the Sleep Mode, and decided to do some research of my own.
I received the sleep mode twice since I owned the truck, one was because I was playing around with the controls and did not have the truck in ON or READY and left it unattended for 3 weeks.
The other time was intentional, I ran the battery down to see when I would get the message, and go into sleep mode and what was the voltage.
I did what every one here has done about settings.
I charged the battery at the ford recommended battery charge points.
I changed my battery to flooded with forscan.
And left the other setting alone.
I reset the BMS.
And installed a volt amp meter to see what going on with the battery while I am driving the truck or when I look thought the window when the truck is off.
I did not change the "percent of charge" since most of the time is was charging at 15.0 volts.
I checked the DC to DC converter, and there no problem putting out current, my test showed 85 amps.
Now since it has warmed up, the charging voltage is down to 14.8 volts
I will be looking into the powerpoint time out.
There is a drain on the battery, but that normal for the electronics.
The picture was taken after starting up after sitting overnight.
After 15 minutes current charging the battery drops to less than a couple amps.
The battery is the factory flooded battery, and load test fine, I have seen my amp meter show 40 amp at 15 volts.
Still doing research.

 

[NedF]

So it's been a few hours since truck was "started"?
Also is your app checking for AGM soc or a standard flooded battery?

Your post reminded me I had not let the app know the battery had been changed to an AGM from a Flooded Cell. Making the Change did not make any immediate difference but I will look at the data over the next few days. I can see a much different decay rate on the V and SoC graphs.

 

[inline_five]

Figured I would throw my experience into this thread as someone that flies to work and parks their vehicle for a week at a time constantly.

When first owning the vehicle in fully stock trim I experienced deep sleep after a couple months and had would remove the battery from the vehicle, recharge to full, reinstall and perform a proper relearn on the BMS. This would only solve my problems temporarily before deep sleep returned.

After reading horror stories of people having no start issues I got concerned and bought a small jump pack that I keep under my back seat now. Thankfully I had it as the next week when I flew home from work my truck was stone dead and the jump pack got me on my way. The next day I went and bought an H5 AGM battery and after a bit of struggle I got it situated in the truck.

Fast forward to today. The AGM battery has been in my truck since the end of August 2024 and I have only had two instances of a deep sleep notification on my phone. Interestingly enough the two times I got those messages I checked the battery voltage at the terminals and it was ~12.1-12.3 volts which is odd because that seems quite high to trigger the BMS.

I work on a rotation of 7 days on and 7 days off so my truck sees a ton of parked time at the airport and I have not had any more instances of no start. Most of the times I get into my truck after its sat for a week it does not illuminate the interior when I unlock it.

Just sharing my experience with an AGM and lots of parked time.

Just an FYI I too park my vehicles for 3-5 days at a time and as such especially in the winter, have issues.

I purchased a 20w solar panel 12v charger which uses a built in BMS to not overcharge the battery. It peaks around 13.2v IIRC when the sun is hitting it perfectly and won't overcharge from there.

This has made a world of difference especially in my wintertime voltages. This will also greatly extend the life of your 12v.

I plan to mount one for the Maverick using a custom mount screwed into one of the bed M14 bolt holes and park with it facing south.

Amazon.com: SUNAPEX 20W 12V Solar Panel Battery Charger Maintainer, Portable Waterproof Solar Trickle Charger with Built-in Charge Controller

It's important to note that you cannot plug it into the cig lighter on the Maverick, as that shuts off. You should hard wire it to the jump points (hybrid) or battery (ecoboost) under the hood.

 

[Tvin87]

Just an FYI I too park my vehicles for 3-5 days at a time and as such especially in the winter, have issues.

I purchased a 20w solar panel 12v charger which uses a built in BMS to not overcharge the battery. It peaks around 13.2v IIRC when the sun is hitting it perfectly and won't overcharge from there.

This has made a world of difference especially in my wintertime voltages. This will also greatly extend the life of your 12v.

I plan to mount one for the Maverick using a custom mount screwed into one of the bed M14 bolt holes and park with it facing south.

Amazon.com: SUNAPEX 20W 12V Solar Panel Battery Charger Maintainer, Portable Waterproof Solar Trickle Charger with Built-in Charge Controller

It's important to note that you cannot plug it into the cig lighter on the Maverick, as that shuts off. You should hard wire it to the jump points (hybrid) or battery (ecoboost) under the hood.

I told myself that if I had any more issues after the AGM battery I was going to add some sort of solar. I had been eyeing up this for a while. https://lensunsolar.com/collections...maverick-lensun-60w-hood-flexible-solar-panel

 

[HeyBales]

This is the status a few hours after taking the truck for its first decent run since changing the battery from the OEM battery to an AGM. I have not changed anything using FORScan. I am not sure why it is showing 97% if the BMS maxes out at 80%. Maybe it’s because the BMS was just reset and is relearning or more likely the BMS uses a different way to estimate the SoC compared to the app I am using.

From that AGM stats from @MakinDoForNow - appears your device estimate isn't too far off.

That 80% setting, appears to be more a limit to the constant current charge, than overall charge allowed or what it'll report. My truck scan data reported 85% after a charge, and relearn overnight.
A couple posters with AGM's have reported their V & SOC% and while eventually it does come down over months, the BMS system is more than willing to allow it higher, even if the amps drops majorly after 80% on a drive, just like usual.

You did the BMS Relearn though with truck locked overnight? Besides the BS reset you mentioned.

Ya, I'm convinced the system's method of SOC% is very different than straight voltage.
Doesn't appear to be a good system either.

 

[NedF]

From that AGM stats from @MakinDoForNow

…You did the BMS Relearn though with truck locked overnight? Besides the BS reset you mentioned.

Yes, I reset and locked and left it until the next day.

The AGM does appear to hold the charge much better than the OEM battery. The SoC did come down to mid 60% after a quick run to and from dinner last night. I am about to go for a longer drive so I will see what it does now that it is close to the low end of the operating range.

 

[CometGT]

Mav47...I thought I read on here that the Deep Sleep issue was only for 22's and 23's. Do the 24's see it also?

Yes. Factory just replaced mine after 9 months, under warranty. 2024 Lariat Hybrid

 

[srfdude44]

I have a '23, among the last before the '24 began its run. I travel a lot, leaving the truck for a week or 2 and yet have not had any problems at all with the stock setup. What could be the reason?

 

[HeyBales]

I have a '23, among the last before the '24 began its run. I travel a lot, leaving the truck for a week or 2 and yet have not had any problems at all with the stock setup. What could be the reason?

How's your AT&T cell signal in areas the truck is frequently parked?

Oh - and odds.

The lights turning off earlier and earlier might be hard to discern during normal usage - battery saver functions might already have started and just not noticed yet.

Used to be a light on my power port USB charger would be shining long after I locked up, would notice it thru window.
That extra time would help charge an old cell phone I use for OBD scanner app, like 0.4 amp, for it turns out up to 75 min.
Now - open the door it's off. Along with lights almost.
(cell phone can't stay charged just during drive time, unless I airplane mode it)

 

[MakinDoForNow]

How's your AT&T cell signal in areas the truck is frequently parked?

Oh - and odds.

The lights turning off earlier and earlier might be hard to discern during normal usage - battery saver functions might already have started and just not noticed yet.

Used to be a light on my power port USB charger would be shining long after I locked up, would notice it thru window.
That extra time would help charge an old cell phone I use for OBD scanner app, like 0.4 amp, for it turns out up to 75 min.
Now - open the door it's off. Along with lights almost.
(cell phone can't stay charged just during drive time, unless I airplane mode it)

I believe power port stays off if battery is below 11.9v (may be when actual battery is at 12.1 and start draw reduces reading by 0.2v). Need maintainer like noco g5 on jump posts.

 

[HeyBales]

I believe power port stays off if battery is below 11.9v (may be when actual battery is at 12.1 and start draw reduces reading by 0.2v). Need maintainer like noco g5 on jump posts.

Not until warmer here has resting V finally been at 12.0 or above, sometimes.
Had been down around 11.6 to 11.7.

I'm going for the warranty replacement to that slightly larger Reserved size you got.
Hopefully before 1.5 years in Oct.
Then expecting the replacement to to get close to 3 yrs.
Hopefully get another replacement under warranty.
Then I solar maintain it.

BMS actually got SOC up to 63% couple days ago, from the 50% abouts it was willing to hang out at during the winter.
It's own figures still show more discharge than charge, so not sure why it's not willing to give a few more amps during the drive, unless it thinks too cold still.

My Noco genius2 has been on the Rav4 for several weeks after warmer temps until last night - going to battery test tonight to see if SOH improved.

 

[HeyBales]

After a recent 4.5 hour drive, my AGM went from a 44% SOC to 84%. That’s the highest I’ve been able to charge the AGM thru driving. Installed AGM August 2024 and it performed well thru the New England winter. Even went as low as a 35% SOC and still had dome lights and start power.

Curious on this upon review.

What's giving your SOC% readings - OBD scanner data of what truck thinks it is, or a battery tester or charger or other means?
Before turning key to On or being driven?

Did you make a Forscan change to the mythological 80% charge figure?

Did you drive less in winter, or about same plus extra idling perhaps?

Thanks for extra info, your 84% caught my eye.

 

[Builder]

Curious on this upon review.

What's giving your SOC% readings - OBD scanner data of what truck thinks it is, or a battery tester or charger or other means?
Before turning key to On or being driven?

Did you make a Forscan change to the mythological 80% charge figure?

Did you drive less in winter, or about same plus extra idling perhaps?

Thanks for extra info, your 84% caught my eye.

OBDLink MX+ dongle readings at truck startup and shutdown. Great software package with access to all kinds of interesting and some obscure PIDs specifically identified for Ford Maverick. No Forscan changes. Driving patterns were unchanged during the winter with no extra idling. Absent a long duration drive ( which are very infrequent), SOC hangs around 65% -68% during this spring season so far; winter was lower by 10% to 20%. The 35% low winter SOC was unusual and not typical of readings (below zero weather and not driven for three days) ACDelco LN1 (H4) AGM. Resting voltage ranges from 12.6v to 12.8v.

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