Need help with CarScanner

[Billyk24]

The battery was cold. But not 30KW cold. This is my 5th winter with the car. It’s been a lot colder. Usually even at -20 I can get 60-70KWH when the SOC is under 10% (as it was) and without preconditioning (which I did this time). Not to mention, the battery would have warmed as it charged so the speed should have gone up if the temp was the limiting factor.
Good thought, but not the root of my problem this weekend.

Do you ever monitor the battery temperature?

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[Murse-In-Airy]

Do you ever monitor the battery temperature?

Yes. Or I used to. I learned on winter number 2 what effect it had. How it related to my efficiency and charging speeds. Battery was at about 50 degrees during this debacle. Not ideal. But not so cold as to throttle the rate to 30KW.

 

[Murse-In-Airy]

So I made a car scanner page to try and get to the bottom of things. I’m at a Tesla Charger. Started at 72Kw speed with a 38° battery at 42% SOC. I guess my ford navigation ended because I couldn’t set it to a charger for a destination. So no preconditioning today. 72KW feels about right for those conditions.

Looks Like my limit at the EA station Saturday was because of the station, not my car. I feel much better about that.

My car scanner page shows that while the charger‘s max is 500V and 500 amps, the car is requesting 394V (~400V) and 165 amps or about 65KW. Again, feels about right for the battery temp and SOC. The Charger is delivering the correct amps and a little less Volts. No biggee.
Big thanks to @RickMachE and @kodiakng for helping me figure this out.

 

[RickMachE]

With Android Auto and Google Maps it will precondition.

As the battery warms you should see the rate rise, assuming it warms before you are too far down the charging curve.

 

[Murse-In-Airy]

With Android Auto and Google Maps it will precondition.

As the battery warms you should see the rate rise, assuming it warms before you are too far down the charging curve.

SOC and Battery Temp created almost the perfect inverse ratio. Stayed right about 60KW all The way to 80% where I could comfortably make it home. Didn’t realize Google Maps would precondition now. I’ll try that next time. Thanks again.

 

[Charge_Rob]

Thanks Rob. I didn't mention, I tried calling EA to reset the charger and they said no because there was no fault showing On their end. My main concern was that I tried 3 chargers with the same result and everyone else that came and went seemed to get higher rates of charge.

if I’m reading this screenshot correctly, the Charger is saying is can do 455V at 90amps for a max raw of 39KW. (top line) and is actually providing 347.17V at 89amps for a rate of 30.9KW (second line). And then the car looks to be requesting 392V at 89.9amps which would only give me 35.2KW but I’m actually getting a rate of 30.67KW (third line).

Can you tell me if I’m reading that correctly?

The 90A is the one to watch. That should read 500 for a 350kW EA charger. If it reads 90, it's a "fail-safe" mode charger. Unplug, try another stall.

Of course, that current limit will be different on other chargers from other manufacturers, and not seeing 500A isn't a failure mode in those cases.

 

[Mach-Lee]

Thanks Rob. I didn't mention, I tried calling EA to reset the charger and they said no because there was no fault showing On their end. My main concern was that I tried 3 chargers with the same result and everyone else that came and went seemed to get higher rates of charge.

if I’m reading this screenshot correctly, the Charger is saying is can do 455V at 90amps for a max raw of 39KW. (top line) and is actually providing 347.17V at 89amps for a rate of 30.9KW (second line). And then the car looks to be requesting 392V at 89.9amps which would only give me 35.2KW but I’m actually getting a rate of 30.67KW (third line).

Can you tell me if I’m reading that correctly?

Top numbers, charger is only capable of 90A and 39 kW max. So bad charger.

 

[Murse-In-Airy]

The 90A is the one to watch. That should read 500 for a 350kW EA charger. If it reads 90, it's a "fail-safe" mode charger. Unplug, try another stall.

Of course, that current limit will be different on other chargers from other manufacturers, and not seeing 500A isn't a failure mode in those cases.

Top numbers, charger is only capable of 90A and 39 kW max. So bad charger.

thanks. When EA refused to reset the charger and multiple chargers only gave 30KW, I really thought it was my car.

 

[MadMatt]

I use two fields:

ChgOA and ChgOAR. OA is the offered from the charger, OAR is requested from the car. I have a screen that I made that has the fields I want all together. This is from the Lightning, but they use the same screen.


Heater power Energy in battery

kW the charger is putting out Battery temp

Actual state of charge Displayed state of charge

Charger offering amps Vehicle requested amps

Instant efficiency State of health

How old is your Lightning that you have a 99% state of health!!? And just curious, how big is that battery.

 

[RickMachE]

How old is your Lightning that you have a 99% state of health!!? And just curious, how big is that battery.

My Lightning is a 2022. I bought it in May 2023 with under 500 miles on it (dealer demo). In 2024 it had 2 battery packets replaced. Has about 17,000 miles on it.

131kWh as compared to the Mach-E with 91kWh.

 

[Mach-Lee]

thanks. When EA refused to reset the charger and multiple chargers only gave 30KW, I really thought it was my car.

EA chargers just really suck sometimes. They are very hit or miss—very common to have derated charging speeds. I hate chargers that are partially broken and can't do at least 350 amps.

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