L2 charging speed recently dropped 33%

[bruddahmanmatt]

Odd that it’s truncating or rounding for some but not others. Regardless, the number reported by FordPass represents the power getting into the battery after charger losses and will always be a bit lower than what the EVSE is supplying. Someone did a graph showing the charging losses at different L1 and L2 rates. Not sure where it is.

The FP app rounds to the nearest whole number on Android while it rounds to the nearest tenth on iOS devices, even my Apple Watch. I know this because I have a Galaxy Tab S7+ that I'll use to check charge if I'm on my tablet and don't have my phone on me at home. Makes sense because I noticed when folks post screencaps from Androids it only rounds to the nearest whole number. I was wondering why folks continued to complain about there being no decimals in charge rate when I can see it on my phone and my watch.

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[Shayne]

Mine definitely was corrected before the Tesla update.

24-PU0102-CHG-SUFX in February updates the same modules as power update 6.6 ( ABS, BECM, PCM, SOBDMA, SOBDMB, SOBDMC) it may have been that one? I never got that I got power up 6.4 and then everything died. Updating those modules is currently on hold from what I have been told. I think it has something to do with 1PD kicking off randomly?

 

[CyberVinnie]

With 54 pages, there’s no way to know if this has been addressed (I mean what would you even search for?), but has anyone considered that the charging rates slow drastically beyond 80% capacity?

 

[kennethjk]

With 54 pages, there’s no way to know if this has been addressed (I mean what would you even search for?), but has anyone considered that the charging rates slow drastically beyond 80% capacity?

It slows down after 45 minutes no matter the battery level

 

[Murse-In-Airy]

With 54 pages, there’s no way to know if this has been addressed (I mean what would you even search for?), but has anyone considered that the charging rates slow drastically beyond 80% capacity?

Depending on temperature, those of us affected will see a slow down at 20% after 12 minutes of charging. This ain’t DCFCing we’re talking about where it slows at 80%.

 

[Maquis]

With 54 pages, there’s no way to know if this has been addressed (I mean what would you even search for?), but has anyone considered that the charging rates slow drastically beyond 80% capacity?

When I had this issue, the deprecated charging Tate happened almost immediately.
What you describe is only relevant to DC fast charging.

 

[markboris]

It slows down after 45 minutes no matter the battery level

? Your charge rate slows down after 45 min on a level 2 charger? Don't think I've heard of that one before.

 

[kennethjk]

? Your charge rate slows down after 45 min on a level 2 charger? Don't think I've heard of that one before.

Drops down to about 6 or 7 from 9.5 amps on a 40 amp EVSe.

here is the big but, on my Autel EVSE in Florida there is no drop off. Another but, for the first year there was no drop off at all On the Juicebox. if started when others were noticing the same thing.

somehow it’s related to Ford and or the Juicebox. Juicebox hasn’t bothered to help and neither has Ford.

 

[markboris]

Drops down to about 6 or 7 from 9.5 amps on a 40 amp EVSe.

here is the big but, on my Autel EVSE in Florida there is no drop off. Another but, for the first year there was no drop off at all On the Juicebox. if started when others were noticing the same thing.

somehow it’s related to Ford and or the Juicebox. Juicebox hasn’t bothered to help and neither has Ford.

Ok, so you don't have a drop on one of your chargers.... interesting. I know I've read quite a bit here where many can't charge at a full rate but never read that after 45 min or so it slows down. I have to say I've not read all of the pages in thread. I only glance at it when it pops up from time to time. I have posted graphs from my Emporia app a few times on this thread. Here is one of them: #525

 

[kennethjk]

Ok, so you don't have a drop on one of your chargers.... interesting. I know I've read quite a bit here where many can't charge at a full rate but never read that after 45 min or so it slows down. I have to say I've not read all of the pages in thread. I only glance at it when it pops up from time to time. I have posted graphs from my Emporia app a few times on this thread. Here is one of them: #525

Actually, I forgot, it doesn’t just drop.

it goes into a yo- yo effect , here is a graph

 

[markboris]

Actually, I forgot, it doesn’t just drop.

it goes into a yo- yo effect , here is a graph

I don't have that yo-yo effect either. You can see in my graph ( #525 ) which shows each minute, they are fairly flat.

I know this is an issue though because I’ve had other MME’s charge at my home and some won’t charge faster than a 6-7A rate.

 

[zvez]

I don't have that yo-yo effect either. You can see in my graph ( #525 ) which shows each minute, they are fairly flat.

I know this is an issue though because I’ve had other MME’s charge at my home and some won’t charge faster than a 6-7A rate.

same, my juicebox 40 on a nema 14-50 charges at a consistent 8kw all the way thru. However I did notice if I charged the car when it was at 85% or so it seemed to be slightly decreased by about a 1kw.

 

[Shayne]

Depending on temperature, those of us affected will see a slow down at 20% after 12 minutes of charging. This ain’t DCFCing we’re talking about where it slows at 80%.

15 minutes and for me temp does not seem to matter -20C to + 30C it is always slow now. The cooling fan never comes on so if that is working it is not that the batteries are too hot pull 40 amp L2. It does come on and warm the batteries now and DCFC still works OK (at least last time). I guess we all need to move to Florida and problem fixed. I just wish dealers would confirm it. Test it and prove us wrong. No bites here but keep asking. That is all on hold now.

 

[thenew3]

Depending on temperature, those of us affected will see a slow down at 20% after 12 minutes of charging. This ain’t DCFCing we’re talking about where it slows at 80%.

I don't think it's a specific % or duration.

In my case, regardless of the battery charge #. I can start at 43 amps (10kw) and depending on the ambient temp, it'll stay at that rate anywhere from 5 minutes (on a hot day) to 15 minutes (on a comfy day) to 45 minutes (on a cold day). Then it will ping pong between 6kw and 10kw for the remainder of the charge cycle, with an average of about 8kw until the battery reaches 98% charge, at which point it slows down to about 5kwh until just before 100% charged when it slows to 1kwh for the remainder (usually about 1 hour to go from 99% to 100%).

If I try to charge at anything above 43 amps, it will start to charge but give me the red ring after a minute or two and stop charging.

It's not the charger, I can charge other cars at 48 amps no problems. I've also tested my MME on multiple chargers and get same results, anything over 43 amps it fails.

 

[CyberVinnie]

My L2 slows considerably

When I had this issue, the deprecated charging Tate happened almost immediately.
What you describe is only relevant to DC fast charging.

I disagree. My level 2 charger app plots a charge curve. It definitely slows down as it approaches 100%.

Ambient air temperature can also affect charging rate.

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