L2 charging speed recently dropped 33%

[Maquis]

I haven't seen any issues with either of our MME's charging from a L2 Grizzl-E charger. Still charging at 8kw per Fordpass.

Have you received the recent DCFC OTA update?

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[Howard]

No. Both of my MME's are updated through 4.2.4; the 2022 MME downloaded and installed the PAAK CSP this morning. When I posted initially, I thought 4.2.4 was the DCFC; once you asked the question, I double checked and realized it was 4.2.6. Sorry for any confustion. If OTA schedule holds, both should update to 4.2.5 sometime this week. So far, OTA's 4.2.3 and 4.2.4 have not really changed anything on my 2023 MME as it already had the main features of those updates already installed. It will be interesting to see what 4.2.5 and 4.2.6 update, if anything, on the 2023 MME. I will definitely be checking once 4.2.6 is installed.

 

[kdryden99]

Well if you get it and your charging curve changes it'll confirm our suspicions

 

[Shayne]

Is this across all L2 EVSEs or just at a specific place? Evidently ChargePoint is having issues with their hope chargers, so might be that....?

See it going down to 6 KW on a 40 amp grizzl-e here also. Was at a constant 8 until recently. 4.2.4 here but a bunch of charging updates done in service after. Guess as long as it keeps charging I am good. Decreased expectation and all.

It does not surprise me that charging speeds are reduced as ambient temps rise, sensors detect, and software prevents damage. I'd rather have slower charge than hardware failures.

'better' solution would require enhanced cooling plumbing around charge port, along conductors, and onward thru HVBJB under bus bars/contactors, and all the way to the batteries.

With nights hitting 10 to 13C (50F) here I think charging would be stopped dead in Arizona. Not the problem software bug would be my guess. There is always a first for everything

 

[dtbaker61]

See it going down to 6 KW on a 40 amp grizzl-e here also. Was at a constant 8 until recently. 4.2.4 here but a bunch of charging updates done in service after. Guess as long as it keeps charging I am good. Decreased expectation and all.



With nights hitting 10 to 13C (50F) here I think charging would be stopped dead in Arizona. Not the problem software bug would be my guess. There is always a first for everything

I have not accepted PowerUp OTA updates *for a while*, and I chanrge with Mobile charger at 32a, so nothing has changed for me....

 

[Shayne]

I have not accepted PowerUp OTA updates *for a while*, and I chanrge with Mobile charger at 32a, so nothing has changed for me....

As long as it charges to the percentage you set it to in the time slot you have it is no harm no foul. Not sure if the up and down in the charging rate is increasing the longevity of all parts involved. Pulsing them must have some effect.

 

[Buellerbueller]

That's normal. 240V x 32A = 7.6kW. After 10% loss, that's about 6.9kW. FordPass truncates the decimal, so would display that as 6kW.

thank you for the clarification! The pdf makes it sound like we should get closer to 20 so I just wasn’t sure.

 

[generaltso]

thank you for the clarification! The pdf makes it sound like we should get closer to 20 so I just wasn’t sure.

The MME’s max charge rate is about 11.5kW, but that requires a 48A EVSE.

 

[dtbaker61]

The MME’s max charge rate is about 11.5kW, but that requires a 48A EVSE.

which is the most you will see on a HOME system.

commercial 'fast chargers' can utilize the AC system, or for faster charging move to DC ports ... this is typically where you start seeing the 20kw-150kw charge rates.

at home, on 240v with 50amp outlet it is best to limit to 32 amps. Hardwired to 60amp breaker you might push that up to 48amps.... but it is almost irrelevant to most people since you can get 200+ mile range of charge at 32amps overnight

 

[devmach-e]

which is the most you will see on a HOME system.

commercial 'fast chargers' can utilize the AC system, or for faster charging move to DC ports ... this is typically where you start seeing the 20kw-150kw charge rates.

at home, on 240v with 50amp outlet it is best to limit to 32 amps. Hardwired to 60amp breaker you might push that up to 48amps.... but it is almost irrelevant to most people since you can get 200+ mile range of charge at 32amps overnight

The fastest AC Level 2 that the MME can do is 48A, regardless of whether it is at home or at a commercial site. Again, specifically for Level 2 AC charging. Not sure if you meant to imply that there are AC Level 2 stations out there that can deliver more than 48A to the MME. It is true that DC fast charging will be between 20 kW and 150 kW.

 

[kdryden99]

Yep but right now its refusing to charge at 11.5 and again tonight its fluctuating from 7 to 8.5

 

[Bikespace]

Keeping this thread alive untill I can charge while monitoring with my OBDII reader.

My GRIZZL-E just has a DIP switch that tells the car the maximum available charge rate (in Amps). The most I can do is 40 A. How are you attempting to control the charge rate? Through your EVSE's app?

I'm convinced this is intended behavior, but would like to know the reasoning behind it.

 

[kdryden99]

Keeping this thread alive untill I can charge while monitoring with my OBDII reader.

My GRIZZL-E just has a DIP switch that tells the car the maximum available charge rate (in Amps). The most I can do is 40 A. How are you attempting to control the charge rate? Through your EVSE's app?

I'm convinced this is intended behavior, but would like to know the reasoning behind it.

Yes through the app, and i agree this most likely is intented however the block at 48 amps is what bothers me more.

 

[Bikespace]

Yes through the app, and i agree this most likely is intented however the block at 48 amps is what bothers me more.

Does it not initiate charge at all, or does it default to a lower rate? My understanding of J1772 is that the EVSE knows the max rate the wiring can handle, but the car controls the actual rate, up to that current.

If you tell the EVSE to support up to 48A, the car should start charging, even if it self limits 40 A, or whatever.

 

[kdryden99]

It initiates and then stops after 5 seconds with the "plugged in not charging" No error codes from the car or the EVSE. If I drop it to 40 it starts. And my wiring is fine, the EVSE was just replaced with a brand new unit.

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