Just had key ON so it had some HVB charging happening, normally 12.1 is found.
usually up to 95% for the change. Still not good to overcharge since in case the SOC is wrong (and that has much inaccuracy to it except after sitting for hours) you easily could be overcharging.
the strategy is 80% state of charge because that gives the best long term battery life. 100% is pretty hard on batteries.
Bad idea unless you really charged up the battery.
Do you leave doors unlocked? I had the same problem while car was in garage but unlocked, while checking charging with doors unlocked meter read 13.1 v with doors locked charged at 14.5 v and never had the battery saver mode issue again.
The 12v battery does not start the ICE, there is no traditional starter in the hybrid. The ICE of the Hybrid is started by one of the electric motors with power from the HV battery, so it's does not need as many CCA as the EB. My previous Hybrid (Toyota Camry) also had a smaller battery (not as small the Maverick) and never had issues in the 6 years I owned it, but of course it was a high quality Panasonic AGM deep cycle battery.
Yes because they computers need to work, just like any modern car
Resetting the BMS erases learned charge history/strategy, and makes it thoroughly sniff the battery behavior again. When used on a battery that's been in service for a while, it can help a bit. Similar to discharging a cell phone to zero and recharging to 100% on many phones recalibrates the "BMS".
Note that the "battery learn procedure" requires that the truck needs to be locked and left undisturbed for at least 8 hours. I almost always lock my truck overnight just in case truck will learn something about the battery (new or not). When I put my noco g5 overnight I will lock the truck just in case the "battery learn procedure" will run and possibly see the battery charged or at least more charged if it's been over 10 hours and I do not need the truck, I will unplug noco g5 and plug it in which will restart the charge check and possibility restart the battery optimize routine. Truck still locked so maybe battery learn runs again seeing battery charged a little further. It may be that locking the truck turns off something maybe because it's an indication that you are not going to use truck for awhile. Also note that double pushing the lock will also turn off the courtesy lighting , the dash screen, the infotainment screen. Also it appears to turn of the communication with the fob, evidenced that clicking doesn't happen when fob is not moving around the truck. This must also reduce 12v battery drain.
I have gotten deep sleep 5-6 times in two years on my 22 hybrid. The dealer tested battery today (took several hours) and their machine said to replace the battery. Will be the same one and I asked if I could pay extra and get an AGM battery and was told not under warrantyDo a forum search, what you are experiencing is the norm, welcome to Maverick Hybrid life. Unless you drive 2 hours a day or more, this is just how it is. It started for me less than two months into ownership. Dealer test the battery "it's fine", yeah because they put it on a trickle charger. I can do that myself and skip the 4 hours at the dealership.
There is no real fix, it's a combination of draw from all the computers, poorly coded charging software, an undersized SLI battery(standard lead Acid battery), rather than a AGM deep cycle and other things.
