Re: Charging works on CCS2 Tesla V2 but not V3
Posted: Thu May 08, 2025 12:21 am
I am thinking of potential issues with the fix in the car.
If you use a separate external battery. Say for example you use a small 9v battery then regulator then resistor in parallel with Pp and Pe pins. While the battery is healthy you have 5v from the regulator and all is good. Lets say the battery discharges and drops below 5v. At some stage the car is going to see that the Pp voltage is less than 5v and think there is a charge plug connected. If you are stopped the car wont start. Who knows what the car will do if you are already moving!
You can put in a switch and only switch this in when you charge at a Tesla SC. As long as you remember to turn it off. I believe the "official BYD fix" gets the 5V from the domain controller so you could do this.
However you will still need to be able to switch out the fix for ac charging as this is controlled by the Pp Pe voltage. This is the associated software fix that BYD does as there fix is permanent.
You don't have this issue with the external adaptor. Once charged you pull the thing out and the car is in its original state. It also avoids removing the front wheel, arch cover to access the back of the charging port to insert a fix. And potential warranty issues changing the car wiring. The external adaptor obviously costs more ($AUD300) for me.
I'm still not sure why BYD doesn't go for the external adaptor. Mass produced in China for $200. No need to pay expensive western prices for labour. The harness is not free to them either. I believe Tesla Terms of use allow external manufacturers adaptors (at least in the States).