L2 charging speed recently dropped 33%

[Shayne]

46 to 80% 4 hours 24 minutes (6.8 KW/hr) 80 to 99% 2 hours 29 minutes (6.7 KW/hr). Middle finger salute goes out to @Ford Motor Company.

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[tuminatr]

There was a serous even deadly for 238 people, strange interaction between a certain model of Firestone tire and the Ford Explorer. Neither the same tire on other cars, nor other tires on the Explorer ever had the problem. Ford and Firestone bitterly blamed each other to the detriment of both. It was the interaction which never received a full engineering explanation, as I remember.

Interactions are strange.

That was a simple problem. Ford built a rough riding explorer and without redesigning the suspension wanted to soften the ride. An easy solution is to lower the tire pressure. So they asked Firestone if it's tire would work @ 26psi. Firestone evaluated and approved the lower pressure for the Explorer application. The tires couldn't handle the weight of the Explorer at that PSI overheated and had blowouts.

IMHO Ford made a bad decision and Firestone should have sounded the alarm but they didn't. It's always the person selling the tire to advise correctly.

 

[Shayne]

My dealer still refuses to acknowledge or address the slow charging on this vehicle. Indicates that there is a campaign right now and my car falls under it but it is on hold right now. Got that campaign in June 2023 that is when the problem started.

Charging last night. Do you think the app can not calculate 40.8/6.5 = 6.3 Kw/hr charging rate or is it just embarrassed and ashamed.

 

[Murse-In-Airy]

Still here with you Shayne. My car charges at the full rate on either grizzl-e. Wife’s car won’t charge above 6kwh on either. It’s a car problem. Not a charger problem. She never drives too far so she doesn’t really notice. But the car still doesn’t do what it is supposed to do. Complete BS on Ford’s part not even acknowledging this.

 

[markboris]

Still here with you Shayne. My car charges at the full rate on either grizzl-e. Wife’s car won’t charge above 6kwh on either. It’s a car problem. Not a charger problem. She never drives too far so she doesn’t really notice. But the car still doesn’t do what it is supposed to do. Complete BS on Ford’s part not even acknowledging this.

I completely agree with Rod (and anyone else) that it's a car problem and have mentioned this here several times before. I've posted my Emporia charge screens clearly showing that my Mach-E charges at the maximum 11.4 kWh while a couple of other Mach-E's that have been to my home, and I've had quite a few, will only charge at a maximum of 6.6 kWh or so. Very frustrating since sometimes they are only here for a few hours but have to stay longer just to get enough charge to get back home. Up until last month, we had no DCFC chargers in our town and the closest one was 40 min away in the opposite direction that most people would be coming from. We just got 8 V4 Superchargers so won't be a problem anymore when friends/members come here.

 

[Bikespace]

Update with a solution (ICYMI):

My car spent two weeks at the dealer, after a prior visit for the same concern, and I had to provide my own EVSE to prove the problem was car related (the dealer did not have a way to L2 charge above 32 Amps). The dealer had to contact Ford engineering, but they did get to the bottom of it. They replaced the "secondary onboard charger", which solved the problem, and allowed full-rate charging.

 

[4sallypat]

Update with a solution (ICYMI):

My car spent two weeks at the dealer, after a prior visit for the same concern, and I had to provide my own EVSE to prove the problem was car related (the dealer did not have a way to L2 charge above 32 Amps). The dealer had to contact Ford engineering, but they did get to the bottom of it. They replaced the "secondary onboard charger", which solved the problem, and allowed full-rate charging.

I thought the Lightnings have 2 on-board AC-DC chargers.
Mach E only has 1 ?

 

[Bikespace]

I thought the Lightnings have 2 on-board AC-DC chargers.
Mach E only has 1 ?

That's what the service writer put in his email to me. If I find the service ticket, I'll post that, too.

But the main takeaway, is that the issue was not the charge port itself, or the temp sensor, or anything like that, and it required persistence on my part, and that of the dealer, to get it solved.

 

[tuminatr]

This issue affects my car too. It won't charge faster than 8 kW. Or at least that what the app shows it's possible the app is rounding down. I will test this via a code reader but have not had a chance to do so.

In good news it has no effect on DC fast charging. For reference that's EA is Scofield, WI set as destination in Ford navigation

 

[thenew3]

This issue affects my car too. It won't charge faster than 8 kW. Or at least that what the app shows it's possible the app is rounding down. I will test this via a code reader but have not had a chance to do so.

The ford pass app rounds down. So if you're charging at 9.2kwh it'll show 8kwh in the app.
So if you're on a 40 amp 240v L2 charger, it should be providing around 9.6kw but the fordpass app will either show 9kwh or more likely 8kwh.

On my car when I charge at 43amps (it fails at anything higher), the EVSE is delivering 10.3kwh but the ford pass will show 9kwh.

 

[kennethjk]

The ford pass app rounds down. So if you're charging at 9.2kwh it'll show 8kwh in the app.
So if you're on a 40 amp 240v L2 charger, it should be providing around 9.6kw but the fordpass app will either show 9kwh or more likely 8kwh.

On my car when I charge at 43amps (it fails at anything higher), the EVSE is delivering 10.3kwh but the ford pass will show 9kwh.

That probably takes into account the loss of energy being transferred to you car

 

[Maquis]

The ford pass app rounds down. So if you're charging at 9.2kwh it'll show 8kwh in the app.
So if you're on a 40 amp 240v L2 charger, it should be providing around 9.6kw but the fordpass app will either show 9kwh or more likely 8kwh.

On my car when I charge at 43amps (it fails at anything higher), the EVSE is delivering 10.3kwh but the ford pass will show 9kwh.

I think it simply truncates. 9.2 KW would show 9, not 8. At least that’s been my experience.

 

[thenew3]

That probably takes into account the loss of energy being transferred to you car

Nope. If I use carscanner and monitor the charge, it's usually just a couple hundred watts lower than what my EVSE shows. So for example if the EVSE shows 9.5kw being delivered, carscanner will show 9.2 or 9.3 kwh going into battery. At the same time fordpass shows 8kw.

 

[Maquis]

That probably takes into account the loss of energy being transferred to you car

FordPass shows what’s going into the battery. A smart EVSE will show what’s going into the truck- it will be more than what FP shows.

 

[kennethjk]

FordPass shows what’s going into the battery. A smart EVSE will show what’s going into the truck- it will be more than what FP shows.

Ok, I was getting only 7 barely are measured by EVSe, due to Mach E problems

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