2020 Model X tripping GFCI...but not 2023 Model Y...

[mitchj05]

Baffling to me...but purchased a 2020 Model X for my wife and get home and it cannot charge using the mobile (5-15) but not issue charging my 2023 Model Y. The Model X instantly kicks GFCI, ive tried changing the settings on the app and in the car to no avail.

What is going on?

 

[Cosmacelf]

The mobile connector doesn’t actually do anything other than energize a relay to connect the car’s power electronics to the receptacle. It seems that each car’s power electronics and or software is slightly different. Before charging, the car sends a tiny bit of current to ground to test to see if there is a ground present. Older or out of spec GFCi receptacles will often trip during that test.

The solution is to replace the GFCI receptacle. For now, you can use a heavy duty extension cord and plug into a different circuit.