Tesla S + Sofar HYD

[korfelm]

Hi,

First of all, thank you for creating this project - it’s a great initiative.

I’m currently struggling with communication between a Sofar HYD15 inverter and a Tesla Model S battery (~2016).

When I set the emulator to Pylontech mode, the inverter communicates without any issues. However, the inverter treats the battery as low voltage (~60V), while the Tesla pack is obviously high voltage, so this setup is not usable in practice.

When I switch the emulator to Sofar (GTX3000 / HV mode), communication with the inverter fails. The emulator does not register any connection, and the inverter reports a communication error. At the same time, the inverter appears to probe the HV side (it outputs high voltage on the terminals), but no proper CAN communication is established.

At this point I’m running out of ideas on how to approach this.

I should also mention that I don’t currently have any DC bus capacitors connected for precharge. I assumed the inverter would handle precharge on its own, but I’m not sure if that assumption is correct.

Any suggestions or similar experiences would be highly appreciated.

[yairda1212-star]

If you use lilygo1 CAN you need to remove the 120 ohm resistor from the lilygo and add 120 ohm resistor on both ends (close too the socket in the tesla between 15,16 and close to the socket in the sofar between 7,8)
If you use 2 CAN lilygo you don't need to add resistors.
Sofar works good with pylontech hv over can bus protocol, address 1 is important in the inverter.
Marke - pylon 30k offset
Mark - pylon invert byteorde
Before you connect the tesla CAN to the lilygo try to set fake battery in the emulator and you need to see on the sofar screen 50%, Don't continue until you succeed to make communication between the lilygo and the sofar.
Don't forget in the high voltage to add cappsitor 600-1000uf -500v
If the tesla battery is up 2024 don't forget to mark digital on thr emulator.