Lost 16% charge sitting in garage

[RLXXI]

Got a teen in the home, preteen? Looks like someone took a little joy ride.

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[TaxmanHog]

16% IN 3 TENTHS OF A MILE???

 

[TaxmanHog]

Something seems odd almost like it was preconditioning off plug but you’d have to drive it as well for that to keep getting activated.

Just "Starting" the truck each day would reset the 2 cycle departure timer inhibit, so if he has a two events daily and happened to also start the truck at some point each day but not drive it, then 16% over a month could have been consumed.

 

[Montecarlossfan]

Just "Starting" the truck each day would reset the 2 cycle departure timer inhibit, so if he has a two events daily and happened to also start the truck at some point each day but not drive it, then 16% over a month could have been consumed.

True , but the question is “who” moved it 3 tenths of a mile lol, could be a kid listening to the radio and moving it.

 

[RLXXI]

16% IN 3 TENTHS OF A MILE???

WOT, wide open throttle if it's a teen lol.

 

[mr.Magoo]

16% IN 3 TENTHS OF A MILE???

Perfect headline for a click-bait video and according to all the YouTubers that's the type of efficiency you can expect when towing in the cold.

 

[El Duderino]

I have noticed that the splash screen in the cluster will display a different mileage versus when the truck is fully booted up. Usually less than a mile, like the original poster experienced.

My guess is your truck didn't add any additional mileage. It was just the way it displays it and rounds the actual value.

 

[Lytning]

Checking state of charge etc or walking by the truck with your key fob or phone will also wake the truck up and use energy, likewise leaving the inverters on. If that was a Tesla, you’d be at zero.

My best guess is the key fob. Even walking around in the house with it in your pocket could wake up the truck frequently.

 

[Spainer]

Skimmed through this. But you lost 16% parks over an extended period? Is it possible you have a departure time scheduled on the app by accident and it’s warming or cooling the truck daily an you’re not aware of it?

 

[djwildstar]

Here are my suspicions:

If you have departure times scheduled, heating the cabin could easily use this much power in a month. IIRC, a departure time can easily use 2% of the battery to warm the cabin. So a 16% drop in SoC could represent about 8 scheduled departures. While I believe there is an inhibit feature that prevents preconditioning the truck for a scheduled departure if it hasn't been driven recently, I suspect starting the truck would reset this. So given that you've stated you started the truck at least a few times during the month it was idle, this is probably the reason.

The truck will also do a 12V "emergency" charge if it detects a low state of charge in the 12V battery. This powers-up the high-voltage system and uses the trucks DC-to-DC converter to charge the 12V battery. However, I don't expect that this is the cause of the issue. The amount of energy consumed from the high-voltage battery is small, and this feature is disabled with the high-voltage battery is below 20%.

Finally, is it possible that someone was sitting in the truck (for example, listening to music) with the truck on and the heater running? In cold weather, the heater can use a decent amount of battery power, and a few multi-hour listening sessions could easily account for the drop in state of charge.

My suggestion is to keep the truck plugged in whenever it is parked, and set the target charge for to 90%. This will keep the battery topped up regardless of what is going on, and make sure that you have enough charge to use the truck. Contrary to common belief, charging every day is better for the truck's high-voltage battery than waiting until the battery is low and charging it back up.

 

[Sneakypetie78]

Got a teen in the home, preteen? Looks like someone took a little joy ride.

My thoughts exactly!!

 

[TenaciousG77]

Finally, is it possible that someone was sitting in the truck (for example, listening to music) with the truck on and the heater running? In cold weather, the heater can use a decent amount of battery power, and a few multi-hour listening sessions could easily account for the drop in state of charge.

This is where my head went. Not sure if it's possible now, but can @FloridaBreen look at "Trip 1" stats again and see what the trip timer reads? That way you could see if someone turned on the truck as the timer would capture that time the HVB was being used.

 

[chl]

My concern is where did 16% of charge go. Tbh I don't know if I put it in gear once or twice between Feb 13 and today, almost positive it didn't travel more than a foot or 2. I recall planning on driving it once but noted that the charge was low 27% and deciding not to take it for a 60 mile trip. It's been a while since I last charged it to 100% to balance the cells. I rarely drive much more than 30 miles round trip and don't drive it more than a couple times a month. Looking back I realized the really cold days were earlier than Feb 13. It's charging to 90% and I'll be taking it for a drive tomorrow 50-70 miles round trip. Plan to recharge it to 100% then see what happens. I've never fast charged an don't have time to get it to 100% before tomorrow's trip.

Best practice if leaving the truck unused for a long period of time (weeks) is to charge it to 40% or 50%, and put the 12v battery on a maintainer with an AGM mode (or disconnect it per the Ford manual - I'd fully charge it first if doing that).

Yes if not plugged in, the truck WILL use some HVB energy to keep it warm - not sure what the temperature threshold is, probably below 40F or so, some say 32F.

It uses around 10kW of power to warm the battery (so they say) - it wouldn't be on all the time using that much power but would come on and off based on battery temperature for short periods of time, as I understand it.

Energy = power x time.

So if 16kWh (energy) was used and the power is about 10kW, that means the heater may have been on for 16kWh/10kW=1.6 hours total, assuming the number for heater power is accurate.

Now, in winter it would be a good idea to keep the truck plugged in to an EVSE in cold weather so energy from the grid would be used to keep the battery warm, thereby conserving the HVB energy.

That will not from what I have gathered, keep the 12v battery charged, so using a 12v battery maintainer as well is a good idea.

 

[CD4TNF]

Just adding a data point. I also just experienced an unexpected loss of battery % while driving on Mar 14th.

Went from 96% SoC to about 66% SoC over the course of about a short 19 mile drive. Around a 30% decrease or 40kWh. Unexpected amount for the distance covered.

Motor power was showing 100%. Energy usage showed around 80% energy used by the motor, everything else was single digits.

Very different situation than OP. I'm guessing mine is a one-off unbalancing of cells. Been two or three months since I did a rebalancing.

I haven't gotten any warnings so I'm not worried. Next time I get a chance I'm going to charge up to 100% to rebalance.

 

[PJnc284]

Just adding a data point. I also just experienced an unexpected loss of battery % while driving on Mar 14th.

Went from 96% SoC to about 66% SoC over the course of about a short 19 mile drive. Around a 30% decrease or 40kWh. Unexpected amount for the distance covered.

Motor power was showing 100%. Energy usage showed around 80% energy used by the motor, everything else was single digits.

Very different situation than OP. I'm guessing mine is a one-off unbalancing of cells. Been two or three months since I did a rebalancing.

I haven't gotten any warnings so I'm not worried. Next time I get a chance I'm going to charge up to 100% to rebalance.

Do you happen to have something like car scanner to check the voltage and soc variation? Could be a cell on the way out.

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