277V Charging

[Maquis]

Has anyone actually verified that the MME will charge on 277V? The reason I ask is that in early 2021, there was a huge thread involving folks in the Chicago area whose cars wouldn’t charge due to ComEd’s excessively high voltage. It was 256-257 IIRC. Ford sent an Engineer out and had to revise the software to allow the out of spec voltage. I suppose the tolerance could have been raised enough to allow 277?
I tried searching for that old thread, but the forum search function wouldn’t cooperate.

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[ABMust]

I have 2022 MME Premium extended. This is the third time I purchased an adapter from Tesla to j1172 .
this time I purchased the Tesla tap 80amp 250vac.
todayFebruary 6 ,2023 I charged my MME using the Tesla tap . MME is charging .
our work charger is a Tesla charger 60amp , 277v .
As Mach Lee says that it’s in the service manual that the maximum VAC is 280v , I don’t know where it says in the service manual coz I can’t find it . But anyway I will try to charge again tomorrow using the Tesla tap let’s see if it will charge my MME

 

[macchiaz-o]

Has anyone actually verified that the MME will charge on 277V? The reason I ask is that in early 2021, there was a huge thread involving folks in the Chicago area whose cars wouldn’t charge due to ComEd’s excessively high voltage. It was 256-257 IIRC. Ford sent an Engineer out and had to revise the software to allow the out of spec voltage. I suppose the tolerance could have been raised enough to allow 277?
I tried searching for that old thread, but the forum search function wouldn’t cooperate.

This was the discussion, Dave:

https://www.macheforum.com/site/threads/home-level-2-charger-issues.3656/

 

[Maquis]

This was the discussion, Dave:

https://www.macheforum.com/site/threads/home-level-2-charger-issues.3656/

That’s it….kudos to your search skills!

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