L2 charging speed recently dropped 33%

[Shayne]

From what I've seen it's only happens during L2 I don't know if anybody else has gone to see a dealership yet or they're all waiting for me? I have my appointment tomorrow.

Your remote departure scheduling thru FP working? If not add it to the list for me.

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[kdryden99]

How are you measuring that? I don't think it's physically possible for the charger to draw more than 48A due to the hardware limits.

Something like that would clip the internal breaker of the EVSE i believe

 

[kdryden99]

Your remote departure scheduling thru FP working? If not add it to the list for me.

Are you talking about the preconditioning before departure? Mine is working. I can see the current draw in the morning.

 

[Shayne]

Are you talking about the preconditioning before departure? Mine is working. I can see the current draw in the morning.

I mean sending a winter departure schedule through Fordpass to the car and it makes it to the car and works. First time every time. Mine definitely does not. Tested with this charging update after service and still a no go manipulating the cars departure schedule through Fordpass.

 

[Maquis]

Has anyone with these issues also noticed too much current draw?

When set to 32 Amps my car will draw 33.6. when set to 48 the car will draw 51!

It’s impossible to draw more current while also seeing a reduced charge rate. They are proportional.

How are you measuring? I’d suspect an instrument calibration issue.

 

[kdryden99]

I mean sending a winter departure schedule through Fordpass to the car and it makes it to the car and works. First time every time. Mine definitely does not. Tested with this charging update after service and still a no go manipulating the cars departure schedule through Fordpass.

I never used the app for this. I suspect this is more the app than anything else. I always program this in the car.

 

[kdryden99]

So was at the dealer. They suspect it's the wiring harness with from the port since the temperature sensor was reading the wrong resistance. There was also a hidden fault code in the system to indicate as such which occurred around the date of the DCFD update. The harness is only available in the US so 2–3-week delay. My opinion, those of us with issues had a defective temp sensor in the harness. This only became apparent after the DCFC update throwing an error code indicating an out of spec result from the temp sensor. This probably caused the system to go into some sort of protect mode where the car would allow charging but only at lower amperage and by throttling the charge resulting in a sawtooth pattern.

They couldn't replicate my Bluetooth issue, but they wanted to do a master reset. I decided not to because I don't think it would resolve that issue but that's for another thread.

So that's my update.

 

[mpshizzle]

How are you measuring that? I don't think it's physically possible for the charger to draw more than 48A due to the hardware limits.

Something like that would clip the internal breaker of the EVSE i believe

This is with the EVSE internal measurement. Until a couple weeks ago, when the EVSE was set to 48A, it would report the car was pulling 45 at most. Now it reports 51.

So either the EVSE has started reading incorrectly, or the car's internal reading is incorrect and it's pulling too much (unless there's an internal breaker)

It’s impossible to draw more current while also seeing a reduced charge rate. They are proportional.

How are you measuring? I’d suspect an instrument calibration issue.

Correct... There's no reduced charging rate here. My EVSE is reporting 12.2kw.

So either the EVSE is wrong or my car is pulling too much.


As a side note when I have the EVSE set to 32A, it's now reading 33-34

 

[Maquis]

This is with the EVSE internal measurement. Until a couple weeks ago, when the EVSE was set to 48A, it would report the car was pulling 45 at most. Now it reports 51.

So either the EVSE has started reading incorrectly, or the car's internal reading is incorrect and it's pulling too much (unless there's an internal breaker)




Correct... There's no reduced charging rate here. My EVSE is reporting 12.2kw.

So either the EVSE is wrong or my car is pulling too much.


As a side note when I have the EVSE set to 32A, it's now reading 33-34

What does FordPass give as the charge rate? The onboard charger should be incapable of more than 11.5 KW.

 

[Mach-Lee]

This is with the EVSE internal measurement. Until a couple weeks ago, when the EVSE was set to 48A, it would report the car was pulling 45 at most. Now it reports 51.

So either the EVSE has started reading incorrectly, or the car's internal reading is incorrect and it's pulling too much (unless there's an internal breaker)

The EVSE current sensor might have gotten out of calibration. If you charge another EV with it, what does it show?

If it's an OpenEVSE, you can adjust the sensor calibration: https://openev.freshdesk.com/support/solutions/articles/6000249625

Also FYI, the OpenEVSE does not actually measure the voltage when it computes the power, it just assumes the voltage is always 240V. So the kW reading is not always accurate.

 

[mpshizzle]

What does FordPass give as the charge rate? The onboard charger should be incapable of more than 11.5 KW.

It's always shown 10kW, even before I started having issues. But TBH I don't really trust the data from the app. I could certainly be wrong but I don't think it's actually based on any kind of current measurement from the car. I think it just calculates it based on percentage of battery going up in x amount of minutes.

The EVSE current sensor might have gotten out of calibration. If you charge another EV with it, what does it show?

If it's an OpenEVSE, you can adjust the sensor calibration: https://openev.freshdesk.com/support/solutions/articles/6000249625

Also FYI, the OpenEVSE does not actually measure the voltage when it computes the power, it just assumes the voltage is always 240V. So the kW reading is not always accurate.

It absolutely could be a calibration issue. On my unit it doesn't show Kw. It only shows amps. The kw I mentioned was based on my own math assuming 240v. But it was definitely showing 51A.

Another symptom I'm seeing is when the car stops charging, I come back to find the EVSE display rapidly flashing between "EV connected - not charging" and "no vehicle connected"

Again, no idea if the culprit is my car or the EVSE. But my inability to charge on a rivian 48A unit did raise some suspicion for the car.

Sadly I don't have another EV readily available to test with

 

[kdryden99]

BTW for those of you that keep on asking if the extended warranty is worth it? The harness costs 800$cdn+labor (145$/hr) which without the 2400$ warranty i would have had to pay myself. I busted my kms, I'm currently at 65000kms. The base warranty is 60000kms.

 

[Maquis]

I think it just calculates it based on percentage of battery going up in x amount of minutes.

I don’t think so. The KW shows up as soon as you start charging. I think the data is accurate, but not precise (No decimals). And it’s the net into the battery, so it will be less than the EVSE shows. Probably not very helpful for this troubleshooting. FWIW, mine will show 10 KW on a 48A charger.

 

[kodiakng]

I don’t think so. The KW shows up as soon as you start charging. I think the data is accurate, but not precise (No decimals). And it’s the net into the battery, so it will be less than the EVSE shows. Probably not very helpful for this troubleshooting. FWIW, mine will show 10 KW on a 48A charger.

keep in mind the voltage can range high too - my circuit runs 249V so my 40A EVSE regularly pushes 9.8kW and shows 9kW in fordpass.

 

[mpshizzle]

I don’t think so. The KW shows up as soon as you start charging. I think the data is accurate, but not precise (No decimals). And it’s the net into the battery, so it will be less than the EVSE shows. Probably not very helpful for this troubleshooting. FWIW, mine will show 10 KW on a 48A charger.

Yeah I'm gonna have to see if I can get another EV on my charger to see what happens... I just wish there was a 48A public charger to experiment with

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