What battery does what?

[ZABSMAV]

I almost wonder if they could somehow program the hybrid battery to stay on a little longer after the truck is turned off to top off the 12v. Although I could see that being a safety issue as well. The only other option would be to increase the amps on the DC-DC converter so that fix. you always have a full battery once the truck is shut off.

That seems like the solution but invariably that would need more than a "simple" software "fix". Likely the charging circuit was designed to charge at a certain current. Similar to a laptop's charger. Unless a higher wattage charger is available for the laptop, no amount of coding in the laptop is going to make the laptop charge faster without the new charger.

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[The Real Maverick]

I almost wonder if they could somehow program the hybrid battery to stay on a little longer after the truck is turned off to top off the 12v. Although I could see that being a safety issue as well. The only other option would be to increase the amps on the DC-DC converter so that you always have a full battery once the truck is shut off.

It's most likely a poorly made 12v battery.

My 12v does not put out good voltage after 16 hours on a bench charger.

So no. Probably not.

 

[JacobEleventeen]

It's most likely a poorly made 12v battery.

My 12v does not put out good voltage after 16 hours on a bench charger.

So no. Probably not.

Is this a new battery or a older one that could be oxidized due to sitting at a low charge though? At least they switched to AGM ones in the 2025 but we will see if that solves the issue.

 

[The Real Maverick]

Is this a new battery or a older one that could be oxidized due to sitting at a low charge though? At least they switched to AGM ones in the 2025 but we will see if that solves the issue.

Not a 25 with an AGM.

 

[ZABSMAV]

Is this a new battery or a older one that could be oxidized due to sitting at a low charge though? At least they switched to AGM ones in the 2025 but we will see if that solves the issue.

It doesn't become oxided. It suffers sulfation.

 

[BAScott62]

There are two types of Maverick hybrid owners. Those who are having deep sleep battery issues and those who don't tell the truth about having the issue.

TIL I learned I must be a liar

 

[Prickly Pear]

The short version is:

The 12v battery supplies the only power when the key / truck is set to off.

The 12v battery "turns on" the high voltage battery.

The HV battery powers everything when the truck is on / running. The 12v battery will be "trickle charged" from the HV battery.

So... Running the inverter when the truck is off will deplete the crappy little battery fast, but if the ignition is switched on it will run off the HE battery till the ICE needs to fire up to keep it at the proper charge?

 

[BlueSpec1]

Couple of forscan screen shots, Maverick running in driveway, the engine runs, then off a couple minutes, then on with HVAC set to High Heat to try to get the electric supplemental PTC heaters to trun on, and a heating pad running from the 400W inverter.

 

[The Real Maverick]

So... Running the inverter when the truck is off will deplete the crappy little battery fast, but if the ignition is switched on it will run off the HE battery till the ICE needs to fire up to keep it at the proper charge?

First, I don't think you can run the 120 VAC power outlets with the key off.

Second part, yes.
You have a quiet, fuel efficient, low emissions 400 watt power outlet for as long as you have gas in the tank.
It will run for weeks on a full tank.

 

[Prickly Pear]

When you say "engine off" do you mean you had the ignition shut off or just the ICE stopped because the battery had hit it's charge limit?
I watched a video where a guy showed he could use his BEV to run some appliances in his house in the event of a power failure. I'm guessing if you wanted to leach some power from teh 400W inverter you would need to have the ignition on and put up with the ICE cycling?

 

[Prickly Pear]

First, I don't think you can run the 120 VAC power outlets with the key off.

Second part, yes.
You have a quiet, fuel efficient, low emissions 400 watt power outlet for as long as you have gas in the tank.
It will run for weeks on a full tank.

Ahh, I never tried to see if key on was required, but that makes sense. If the little 12V can't handle sitting idle it sure as hell would not be able to put our 400W for very long.

As an aside, I have run my son's Bi-pap machine overnight using an inverter hooked up to my Toyota Sienna battery - it only pulls about 10 watts and they put a pretty good size battery in.

 

[Prickly Pear]

Just saw this in the manual - guess max power in park accounts for the HE battery being used while driving to power the traction motor.

Note: The power outlet provides full
available power when the vehicle is in park
(P). Power availability may be reduced
when the vehicle is in drive (D).

 

[HeyBales]

Using Forscan Lite logging function.
Here's my 10 min run into work, 1/3 the time on the highway. Cold day, 25 F, wanted ICE running more in an example of not mattering for charging, nor highway speeds.
SOC started 50%, 11.5 V, before engaging the HVB in On & Ready mode.
SOC ended 52%, 11.8 V (after some surface discharge holding down brake, but not totally accurate)

Starting & continuing charge rate:
15A drop to 10A in about 7 sec,
10A drop to 7A abouts 17 sec,
7A drop to 5A abouts 44 sec,
5A drop to 3A abouts 176 sec, almost 3 min,
3A drop to 2A abouts 109 sec, with strange spike up to 10A about 344 sec in, for only ms, when SOC jumped up,
2A drop to 1A abouts 250 sec, tad over 4 min.
Ending charge rate between 1 & 2, guessing abouts 1.5A.

If BMS was basing this charging method on 50% SOC it was aware of, and starting voltage 11.5, it really seems it should have kept the higher charging rate for much longer. (most of that happened before I started moving!)
Cold battery factor in algorithm?
Saw the same thing in more pleasant fall days 70 F the whole time.
If anyone wants the raw data, it's got more fields in the log - HVB A/V/SOC, torque Eng/Motor, RPM Eng/Gen/Motor.

 

[Hoagus]

More accurately it "should" be charging the 12v DC battery. But alas, It does not properly charge it, thus we are all getting the Deep Sleep notification.

My 2022 works just fine. I got rid of FordPass.

 

[ZABSMAV]

My 2022 works just fine. I got rid of FordPass.

I can almost guarantee that your Maverick is still going into deep sleep if you have a hybrid. Do you ever go out to it and find the interior dome light and headlights dont come on when you open the door?

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