Dynamic weather changes + charging

[VindictivePantz]

As many US residents know, the weather has been and continues to be a bit dynamic. I'm in the Chicago area where it's been very cold, and I reset the drive history a few weeks ago; however, the temperature is going from below zero to the 30s - 50s over the coming days and I am planning on a trip to Nashville. I have a couple of n00b-ish questions:

1. Does the MME's GOM adjust based on temperature, especially when it's dynamic?
2. I assume the kWh dumped into the battery is always "maximized" based on target percentage of total capacity, despite temperature?

For my Nashville trip, ABRP has a 12 - 17 hour trip (an ICE trip would be 7ish.) It looks like it's assuming current temperatures, not the ones for the future (even though I put in the right departure date.)

Right now, I am assuming ABRP is being ABRP, and that if my assumption on #2 is correct and if I just watch my consumption + ABRP gets smarter during the trip, I can go longer between its suggested charges.

Any guidance is appreciated!

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[RickMachE]

As many US residents know, the weather has been and continues to be a bit dynamic. I'm in the Chicago area where it's been very cold, and I reset the drive history a few weeks ago; however, the temperature is going from below zero to the 30s - 50s over the coming days and I am planning on a trip to Nashville. I have a couple of n00b-ish questions:

1. Does the MME's GOM adjust based on temperature, especially when it's dynamic?
2. I assume the kWh dumped into the battery is always "maximized" based on target percentage of total capacity, despite temperature?

For my Nashville trip, ABRP has a 12 - 17 hour trip (an ICE trip would be 7ish.) It looks like it's assuming current temperatures, not the ones for the future (even though I put in the right departure date.)

Right now, I am assuming ABRP is being ABRP, and that if my assumption on #2 is correct and if I just watch my consumption + ABRP gets smarter during the trip, I can go longer between its suggested charges.

Any guidance is appreciated!

I don't know what #2 means.

I've never had ABRP provide a 12-17 hour range on any trip. If you're using the free version of ABRP, it doesn't take into account temperature unless you put it in.

I also plan a trip in GoogleMaps to see the true miles / time, then use ABRP to see what it's suggesting that is different.

 

[Mach-Lee]

As many US residents know, the weather has been and continues to be a bit dynamic. I'm in the Chicago area where it's been very cold, and I reset the drive history a few weeks ago; however, the temperature is going from below zero to the 30s - 50s over the coming days and I am planning on a trip to Nashville. I have a couple of n00b-ish questions:

1. Does the MME's GOM adjust based on temperature, especially when it's dynamic?
2. I assume the kWh dumped into the battery is always "maximized" based on target percentage of total capacity, despite temperature?

For my Nashville trip, ABRP has a 12 - 17 hour trip (an ICE trip would be 7ish.) It looks like it's assuming current temperatures, not the ones for the future (even though I put in the right departure date.)

Right now, I am assuming ABRP is being ABRP, and that if my assumption on #2 is correct and if I just watch my consumption + ABRP gets smarter during the trip, I can go longer between its suggested charges.

Any guidance is appreciated!

1. Yes, it adjusts based on current and projected temps, and also usage history.
2. Not sure what you're asking here. 80% is 80% of full. If you change the temperature of the battery the SoC doesn't really change much at all (less than 1%).

You should keep it to around 150 miles or less between charging stops.

 

[VindictivePantz]

I don't know what #2 means.

I've never had ABRP provide a 12-17 hour range on any trip. If you're using the free version of ABRP, it doesn't take into account temperature unless you put it in.

I also plan a trip in GoogleMaps to see the true miles / time, then use ABRP to see what it's suggesting that is different.

Thank you.

For clarification, I am trying to convey (poorly) that despite temperature, if I set it to charge to 90%, the battery pack charges to 90% (knowing not all cells are perfect) and does not artificially cap charging due to temperature. I hope that makes more sense. I think I am overthinking it. 90% should just be 90% of total capacity.

I am using the paid version of ABRP, which is why it has me scratching my head.

 

[RickMachE]

From Naperville to Nashville is 496 miles, 7:47 via GoogleMaps.

ABRP for your car (basically my car) shows 8 hours and 29 minutes of driving, and 1 hr and 32 minutes of charging (4 charges), using a reference consumption of 2.5 miles per kWh and a temperature of 25 degrees.

Looks right on to me.

 

[Shaka]

1- Yes the GOM is dynamic, but conservative. You can park the car and see 100 miles of range because its 15F out then go back to the car two days later at the same state of charge (SOC) percentage but see a higher/lower figure based on if the temp went up/down. It seems that Ford is a bit conservative, at least in my experiences across 2x ’22 GT vehicle but YRMV

2- When you charge, it is based on SOC% of the kWh avaiable. It has nothing to do with miles. That said you will lose kWh over time as the battery degrades, but even that is minimal. So when you set the slider to 80% or 90% or 100% that is of the kWh, nothing to do with Miles.

 

[Shaka]

Regarding ABRP — I don’t use that app often, but I know it can be adjusted and tweaked and played around with for the weather, wind, and other factors. As someone else noted above the figures seem to maybe make sense. I’m located in Cleveland, Ohio so fairly close to Chicago — and Generally speaking the best chargers in this part of the country will be Electrify America (EA).

WE did a trip in our Volvo XC40 which has just over 200 miles of EPA range, with a 75kWh (net) battery. As with the dozen Tesla vehicles and other EVs we’ve owned, my general rule of thumb is that you stop every 2-2.5 hour for 0.5 hours of charging. Based on a drive that is 8 hour, that would be 4x stops or 2 hour of total stopping. That would make a 10 hour trip.

But if the weather is colder, then you may be stopping more often. Suddenly you may see 12+ hours so that does add up, especially in this cold weather. TBH what I’d be more worried about is how inefficient you’ll be in below freezing temps, how far apart the chargers are, and if you’ll have issues with the DC 80% limit — all things to consider. But generally speaking as you head south, and it gets warmer, you should be better off, and in turn, I suspect your trip will be just fine!

 

[VindictivePantz]

1. Yes, it adjusts based on current and projected temps, and also usage history.
2. Not sure what you're asking here. 80% is 80% of full. If you change the temperature of the battery the SoC doesn't really change much at all (less than 1%).

You should keep it to around 150 miles or less between charging stops.

Thank you. #1 is the fudge factor with this wacky weather; I went into this winter assuming Chicago was going to be Chicago and it'd be cold + miserable for months. I was not expecting 50F in December/January.

#2 is exactly what I was after, despite how terribly worded my question was. Appreciate you and other sticking with me on that.

From Naperville to Nashville is 496 miles, 7:47 via GoogleMaps.

ABRP for your car (basically my car) shows 8 hours and 29 minutes of driving, and 1 hr and 32 minutes of charging (4 charges), using a reference consumption of 2.5 miles per kWh and a temperature of 25 degrees.

Looks right on to me.

Thank you - and I expected 9-10 hours total time, so I'll keep monkeying around with ABRP.

1- Yes the GOM is dynamic, but conservative. You can park the car and see 100 miles of range because its 15F out then go back to the car two days later at the same state of charge (SOC) percentage but see a higher/lower figure based on if the temp went up/down. It seems that Ford is a bit conservative, at least in my experiences across 2x ’22 GT vehicle but YRMV

2- When you charge, it is based on SOC% of the kWh avaiable. It has nothing to do with miles. That said you will lose kWh over time as the battery degrades, but even that is minimal. So when you set the slider to 80% or 90% or 100% that is of the kWh, nothing to do with Miles.

Thank you!

Regarding ABRP — I don’t use that app often, but I know it can be adjusted and tweaked and played around with for the weather, wind, and other factors. As someone else noted above the figures seem to maybe make sense. I’m located in Cleveland, Ohio so fairly close to Chicago — and Generally speaking the best chargers in this part of the country will be Electrify America (EA).

WE did a trip in our Volvo XC40 which has just over 200 miles of EPA range, with a 75kWh (net) battery. As with the dozen Tesla vehicles and other EVs we’ve owned, my general rule of thumb is that you stop every 2-2.5 hour for 0.5 hours of charging. Based on a drive that is 8 hour, that would be 4x stops or 2 hour of total stopping. That would make a 10 hour trip.

But if the weather is colder, then you may be stopping more often. Suddenly you may see 12+ hours so that does add up, especially in this cold weather. TBH what I’d be more worried about is how inefficient you’ll be in below freezing temps, how far apart the chargers are, and if you’ll have issues with the DC 80% limit — all things to consider. But generally speaking as you head south, and it gets warmer, you should be better off, and in turn, I suspect your trip will be just fine!

Thank you - the 10 hours is what I had calculated in my head, and ABRP's estimate had me questioning everything I thought I had learned from this forum + experience.

This post helped validate that I was not losing my marbles, at least in this case.

I cannot thank everyone enough for this forum - it's been amazing. Thank you!!!

 

[ADDZ71]

I like the ABRP trip plan posted by Rick. That is what I fundementally did for a trip of ~400-500 miles. I tried to limit by drives between charging to ~125-140 miles in "0" degree weather. During the summer I would likely stretch the stops to ~180 miles assuming only going to 80% at a DCFC. I have GT. I put the reference Wh/mile at 400 in ABRP during the planning.

 

[RickMachE]

Note that some of the ABRP settings can be swapped in the app (I use the website to plan, and with a free account then access the plan on my phone).

Reference consumption on the website is in miles per kWh at 65. On the app, it can show Wh/mi or mi/kWh. Since the latter matches the website AND is how the usage is presented in the car, I use that.

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