-20F to -30F performance and experience

[FatmanOSU]

I did a non preconditioned DCFC charge yesterday and was getting 44Kw in 6 degree temps. I can usually get 140 Kw out of the same charger on a normal day. Looks like Telsa person got same as me that day.

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[Maxx]

This morning it was 15 degrees in the open air, garage where truck is parked was 23.
Truck was plugged in overnight, not one KWH of energy was consumed to maintain pack temp.
Remote start for ~10 minutes to get cabin warm on grid, consuming 1.06 KWH

After a couple hours in the open cold air, and some idling with the cabin temp set for 72.

Low temps overnight the rest of the week will be in the area of 15°, not as bad as you folks in the midwest, Canada or Alaska..

Interesting that preconditioning didn't kick in at 23. Battery must have kept some heat from the day before. Mine considered 26.6F cold enough to heat up the battery.

Were you plugged in when you started the truck? On my truck, Preconditioning took the truck up to 41F when plugged in but off. But when plugged in while on, it went up to 50F when I turned it off. Not sure, how high it would go if I kept it running.

I did a non preconditioned DCFC charge yesterday and was getting 44Kw in 6 degree temps. I can usually get 140 Kw out of the same charger on a normal day. Looks like Telsa person got same as me that day.

Did it start right away and started at 44 KW?

 

[mr.Magoo]

Truck was plugged in overnight, not one KWH of energy was consumed to maintain pack temp.

Here's what mine did Monday when it got down to 2F overnight.
The peaks at 5.30 and 11am is the truck warming up the battery.
Note that it doesn't warm it to 60F like it would if you "condition it" just enough to keep it above whatever threshold there is.

 

[mr.Magoo]

There is no charging going on here. Just conditioning and as you can see it is using 6.24 KW to heat up the battery.

Just so were talking the same language, what do you mean by no charging just conditioning?
Is the truck "started" ? Via ignition or remote start?
Are you using pre-conditioning by setting a departure time ?

What size charger do you have ?

 

[Maxx]

Just so were talking the same language, what do you mean by no charging just conditioning?
Is the truck "started" ? Via ignition or remote start?
Are you using pre-conditioning by setting a departure time ?

What size charger do you have ?

Home charging limit was set at 50% SOC and truck SOC was over that so when I plugged in, there were no electrons going into HVB.

I didn't do anything actively to Precondition the battery including setting departure time. I just plugging in my Ford mobile charger (30A). The truck considered 26.6 F battery temp low enough to turn on the HVB Coolant heater and pump it through the battery.

Truck was not started but kept heating the battery until it got to 41F. If it was started, it would not stop at 41F.

 

[Maxx]

While we are talking tech here, does anyone know if Primary and secondary motor coils and associated inverters are used for anything other than turning the wheel and regen during slow down?

 

[TaxmanHog]

Interesting that preconditioning didn't kick in at 23. Battery must have kept some heat from the day before. Mine considered 26.6F cold enough to heat up the battery.

Were you plugged in when you started the truck? On my truck, Preconditioning took the truck up to 41F when plugged in but off. But when plugged in while on, it went up to 50F when I turned it off. Not sure, how high it would go if I kept it running.

I might have kept some of the residual heat from prior days, truck was off yesterday evening when I plugged into the FCSP, I had already lowered the max charge rate to 50% so that the truck would not demand charging energy, but the FCSP does make energy available for departure timer or remote start events, this morning I only remote started while plugged in.

We have a few more days of chilly weather, I would like to see it actively draw energy like Magoo is showing.

 

[TaxmanHog]

While we are talking tech here, does anyone know if Primary and secondary motor coils and associated inverters are used for anything other than turning the wheel and regen during slow down?

If you're asking does it do what Tesla's do, {Active stationary heat generation} no it does not do that, but there is an oil/glycol heat exchanger that will capture excess heat from the transaxles, but sitting stationary overnight, it's not generating heat.

 

[TaxmanHog]

I'm doing a departure time event for leave at 1900 hrs, the truck decided it should begin the battery warming process autonomously (FP is down right now) I had programed this on the Sync 4a screen earlier this afternoon just prior to FP going down.

Chart on the right shows the energy flow by the minute, for 24 minutes the battery warming effort ran initially started around 9 KW, then bumped itself up to 18 KW, chart on the right shows a total of 5.34 KWH consumed over that 24 minutes. I had the cabin warming function OFF in the configuration so that we see exactly what went into battery warming, truck has been in mid 20's weather all day.

At 1900 hrs, I will be going out for a coffee run, looking forward to seeing how the available energy to motor is, earlier it had dropped to 88%.

 

[TaxmanHog]

FOrdpass just came back online.
This is the before & after impact of 24 minutes of battery warming.
An extra 28 miles for 5.34 KWH

 

[Grumpy2]

Wow, that is significant. How fast will that boost disappear as you drive?

 

[TaxmanHog]

I deleted the preconditioning record. and now warming up the cabin with remote start @1846, started ramping up to 18 KW, then let it run for 15 minute cycle for a grand total of 9.11 KWH, 3.77 for the cabin heating.

 

[TaxmanHog]

Wow, that is significant. How fast will that boost disappear as you drive?

We will see, the precondition session also restored full available power. Short trip to coffee shop of 5 miles lowered available range from 136 to 130, highway speeds of 66 mph

 

[Maxx]

An extra 28 miles for 5.34 KWH

Keep in mind, this would be true if you use the entire battery capacity before your battery gets cold. If you drive 5 miles to the coffee shop, come back unplug and wake up tomorrow morning with your battery at the same ambient temperature as yesterday, you really got less than 2.5 miles out of that 5.34 KWh.

 

[Jim Lewis]

Silver Bells and Little Drummer Boy?! It's Christmas all year round in Massachusetts!