Hi, I have a 2024 F150 Lariat, hybrid, Powerboost, 7.2kw that I bought new in Nov. 2024 and has 10,600 miles. On April 14th I posted that the truck was dead and that I jumped it off with a Wolfbox battery back. I figured that was my fault as I had not driven her in a week or 10 days. I had been using my convertible, it's been so nice. I drove her for 45 minutes at 50 to 60 mph. I have driven her every day since, except yesterday, for 20 to 30 miles a day. She has been fine, until today. When I turn off the engine a message is on the screen, "System off to save battery".
Nothing has changed with the truck since I bought her. I do have front and rear cameras that turn off when the engine is off and a rodent repellant to keep the squirrels out of the engine area which is on all the time (squirrels got the wiring on my other F150), but these were installed when I got her. The display shows 14 volts with the engine running and 12.28 volts with the engine off.
Is this an indicator of a bad OE battery? It is an H7. Do I simply need to charge it with my charger? Should I take it to the dealer?
Thank y'all.

 

I would take it to the dealer and let them test it before I went out and spent money on a new battery. If it sits more then it is driven it will do this. If you take a bunch of short trips shutting it off and restarting it cause the same thing.

Get yourself a good battery tender and hook it up when it is going to sit.

 

Mlarv, thank you.

 

What is the milliamp draw of the always on rodent repellent device?

 

Coolbreeze, the paperwork says 120ma/12 volt, but I have not measured it. I have the same unit on my Husqvarna lawn tractor (12 volt) that is kept in outside storage. It was turned on, protecting it for over 3 months, without the engine being cranked and the mower started right up in March.
Critters did $1,300 worth of damage to the wiring on my 2007 Lariat and I replaced all of it. Later traded it for this 2024 Lariat.
I may put my charger on it till it goes to "flo charge" (trickle) and see what happens after that.
Thanks for your question.

 

What is this critter deterrent? I live in the woods and I am constantly fighting small rodents. Do you have a link?
thanks

 

The aux battery could also be bad/going bad, so have it checked as well.

The message you got is commonly complained about by those who don't drive their truck a lot. In my opinion it's part and parcel of the poor Ford Engineering implementation of the BMS system. There are ways to adjust the BMS/charging parameters with Forscan. The easiest thing to do is connect a battery maintainer when you aren't going to drive the truck for a while.

 

You already got a lot of answers in the other thread.

Either put it on a battery maintainer, change the state of charge request with ForScan and/or upgrade the auxiliary battery with a bigger one. A lot of Powerboost guys do upgrade the auxiliary and it certainly helps.

 

Implementation of the BMS system overall is excellent. The parameter to adjust the battery SOC at 80% is driven by Fuel Economy, not by engineering.

 

You have your opinion, I have mine. Any charging system that doesn't keep a battery charged enough to allow the vehicle to sit for 2-3-4 weeks and start is poor engineering. There have been constant complaints here on the forum about exactly this issue since BMS was implemented, and Ford has basically done nothing to address it. The consumer should not be left to try to fix THEIR issue.