Charge Time Accuracy

[Muffin_Man]

Hello all, first time posting. I have had my Lightning (Flash) about two weeks now (absolutely love it, best purchase ever!). Yesterday I took a road trip and ended up depleting the battery down to 16 miles, normally I would not have let it get this low but I live in the sticks of SW Virginia where public charging stations are scarce.

When I got home I plugged in (48 Amp) and went to bed. This morning when checking the Fordpass app my SOC was @ 80% with a remining 14 hours to 90% (my preferred % target). I had to stop charging due to peak utility rates kicking in but I am a little concerned about the remaining time, 14 hours for another 10%?? It was charging at 10.3kW when I stopped the charge. Does this sound right? Thanks for any input.

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[NeighborGeek]

I'm new to the Lightning, but my wife has had an EV for several months so I know a little bit about it. In general, the higher the SOC, the longer slower it will charge. For example, it might charge at full speed until it gets to 50% SOC, then slow down a little, with the charge rate dropping even more at 80% SOC. I've frequently read that it can take almost as long to get that last 20% of charge as it did for the first 80%. That said, 14 hours from 80-90% definitely seems excessive. I'm also not sure if the slowing charge rate applies as much when charging via L2 as it does with L3.

I took a bit of a trip with my new truck this weekend, roughly a 3 hour drive each way and got to charge a couple of times on the way. I found the fordpass app's estimated charge time calculations to be pretty wonky, to the point that when I'd move the target chage level slider around it would show that the estimated time to charge would jump around and wouldn't be the same even if I moved the slider down and right back up to where it was. At one point, it was showing that it would take much longer to get to 50% charge than it had previously estimated for 90% charge. Then when I stopped at an L3 for a few minutes on the way home, I checked the ford pass app when coming out of the gas station and it said I'd be at 90% in 10 minutes. That seemed unrealistic, and when I got in the truck and turned it on the dash said it would be at 90% in 33 minutes. So, I would definitely not trust the estimates in the app.

 

[RickLightning]

The estimate to completion is frequently inaccurate.

While speed of charging does slow down with DC fast charging as the charging curve goes on, as @NeighborGeek, notes, it's not the case with AC charging.

To estimate the time, do the math. 10.3kW charging rate, 10% of battery left. Divide that number by 10.3 and that's the time to charge. Example - 131kWh battery, 10% is 13.1. 13.1/10.3=1.3 hours. Round up a bit, call it 1.5 hours.

@Muffin_Man, you need to update the vehicles in your profile.

 

[BhamDCam]

When does your TOU plan start? The 14 hours may be including the time between the end of your TOU plan and when it starts back again.

 

[Heliian]

stop charging due to peak utility rates

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[Muffin_Man]

The estimate to completion is frequently inaccurate.

While speed of charging does slow down with DC fast charging as the charging curve goes on, as @NeighborGeek, notes, it's not the case with AC charging.

To estimate the time, do the math. 10.3kW charging rate, 10% of battery left. Divide that number by 10.3 and that's the time to charge. Example - 131kWh battery, 10% is 13.1. 13.1/10.3=1.3 hours. Round up a bit, call it 1.5 hours.

@Muffin_Man, you need to update the vehicles in your profile.

That's good to know, I really appreciate that. Thank you!

 

[Crafty]

Hello all, first time posting. I have had my Lightning (Flash) about two weeks now (absolutely love it, best purchase ever!). Yesterday I took a road trip and ended up depleting the battery down to 16 miles, normally I would not have let it get this low but I live in the sticks of SW Virginia where public charging stations are scarce.

When I got home I plugged in (48 Amp) and went to bed. This morning when checking the Fordpass app my SOC was @ 80% with a remining 14 hours to 90% (my preferred % target). I had to stop charging due to peak utility rates kicking in but I am a little concerned about the remaining time, 14 hours for another 10%?? It was charging at 10.3kW when I stopped the charge. Does this sound right? Thanks for any input.

Mine does this when bumping up against peak time. For example if I start the charging at 1300 it will have a longer time to full as it will stop at 1700 peak start. If I start at 2000 it will be shorter as this starts off peak and super off peak at 0000

 

[bmwhitetx]

When I got home I plugged in (48 Amp) and went to bed. This morning when checking the Fordpass app my SOC was @ 80% with a remining 14 hours to 90% (my preferred % target). I had to stop charging due to peak utility rates kicking in but I am a little concerned about the remaining time, 14 hours for another 10%?? It was charging at 10.3kW when I stopped the charge. Does this sound right? Thanks for any input.

When you set up your 90% target in the Charging app, did you also set charging times?

 

[Muffin_Man]

When you set up your 90% target in the Charging app, did you also set charging times?

Yes, but just weekdays from 8p-7a for my home location. Considering my Emporia charger also has this schedule it's redundancy and I should delete it...

 

[Muffin_Man]

When does your TOU plan start? The 14 hours may be including the time between the end of your TOU plan and when it starts back again.

That would explain things perfectly, TOU is 8p-7a on weekdays. The app knew it needed about another hour and that would have been after 8pm this evening at 9p, 14 hours later. Spot on!

 

[bmwhitetx]

Yes, but just weekdays from 8p-7a for my home location. Considering my Emporia charger also has this schedule it's redundancy and I should delete it...

My point was the same as the other poster. The estimate was allowing for the charging hours that you set up in the Charging app in Sync. It knew it wasn't going to charge from 7a-8p and factored that in to the estimate.

Note, the Ford app doesn't know anything about your Emporia schedule.

 

[RickLightning]

Yes, but just weekdays from 8p-7a for my home location. Considering my Emporia charger also has this schedule it's redundancy and I should delete it...

Here's why to consider NOT deleting the Emporia schedule - it prevents the vehicle from pulling power during peak hours without your direct intervention.

Why does this matter?

1) Set a departure time during peak hours. Do you really want to pull house current to warm your battery and cabin?

2) Battery wants to, but doesn't NEED to, warm for a quick hit in very cold weather. You don't want it to.

3) Prevents a person unfamiliar (or uncaring like a spouse or child) from charging your vehicle during peak hours by simply pushing the charge button next to the port after plugging in and the session not starting (which overrides things it appears). Charger still won't charge.

 

[Muffin_Man]

My point was the same as the other poster. The estimate was allowing for the charging hours that you set up in the Charging app in Sync. It knew it wasn't going to charge from 7a-8p and factored that in to the estimate.

Note, the Ford app doesn't know anything about your Emporia schedule.

So glad I found this forum, i really appreciate everyones help. Not to mention, it was this forum that ultimately sold me on getting this truck. Been lurking about since May

 

[Muffin_Man]

Here's why to consider NOT deleting the Emporia schedule - it prevents the vehicle from pulling power during peak hours without your direct intervention.

Why does this matter?

1) Set a departure time during peak hours. Do you really want to pull house current to warm your battery and cabin?

2) Battery wants to, but doesn't NEED to, warm for a quick hit in very cold weather. You don't want it to.

3) Prevents a person unfamiliar (or uncaring like a spouse or child) from charging your vehicle during peak hours by simply pushing the charge button next to the port after plugging in and the session not starting (which overrides things it appears). Charger still won't charge.

Great advise, thank you!

 

[NeighborGeek]

So glad I found this forum, i really appreciate everyones help. Not to mention, it was this forum that ultimately sold me on getting this truck. Been lurking about since May

My teenager was just asking the other day if I knew you. He's on a school trip in London and passed by Drury Lane

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