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Gen 2 Wall Charger Now Only Goes to 16 Amps

RedNeB

Member
Jun 3, 2019
45
18
CT
Are there any nearby transmitters (ham, cb) in your neighborhood?

Strong, nearby transmitters can cause radio frequency interference (RFI) in computer circuits - and drive them nuts. And it will be random - only when that transmitter is being operated on a particular frequency.

Not that I know of. The charger has worked flawlessly for the last year until the last week or so.
 

CoachK

Member
May 5, 2019
21
12
Philadelphia
Just had a conversation with Tesla service. The issue is a software one. The car is currently more sensitive to voltage fluctuations and is effecting cars in areas with "dirty" electricity. They were able to check our home location and confirmed it falls into that category. They are working on a firmware fix. The technician was pushing out 2020.36.11 to both the MY and M3 but wasn't sure if the fix had yet been placed in those updates.

It makes sense and is what we had concluded since the mobile chargers didn't work either and didn't work at a neighbors (all on the same grid). The cars charged at a tesla site (cleaner electricity since they are on a commercial line).

Hope that helps!

It's also only effecting M3 & MY since they use the same charging platform
 
Last edited:

brkaus

Well-Known Member
Jul 8, 2014
7,741
6,273
Austin, TX
Interesting. Now that you mention it, I seam to remember a similar issue in the past reported. I think it was a small area in Houston.
 

RedNeB

Member
Jun 3, 2019
45
18
CT
Just had a conversation with Tesla service. The issue is a software one. The car is currently more sensitive to voltage fluctuations and is effecting cars in areas with "dirty" electricity. They were able to check our home location and confirmed it falls into that category. They are working on a firmware fix. The technician was pushing out 2020.36.11 to both the MY and M3 but wasn't sure if the fix had yet been placed in those updates.

It makes sense and is what we had concluded since the mobile chargers didn't work either and didn't work at a neighbors (all on the same grid). The cars charged at a tesla site (cleaner electricity since they are on a commercial line).

Hope that helps!

It's also only effecting M3 & MY since they use the same charging platform

That's really good info to have. Thanks for the follow up. It figures that's what it is. Hopefully they push out an update soon.
 

smatthew

Active Member
Jun 9, 2018
1,255
2,059
CA Bay Area
Let's compare two charge sessions on a Gen 2 wall charger. Both start at 57% and end at 90%. But one charges at 48 amps the whole time and take 2:10, while the other averages 22.7A, and takes 4:39

Hoping this is resolved with software.

This is what I consider a "Normal" charging session.
Screen Shot 2020-09-27 at 6.18.30 PM.png

Here's a typical charging session more recently.
Screen Shot 2020-09-27 at 6.20.53 PM.png
 
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