G’day Lynden, I hate that self define mode! it has a terrible time tracking SoC. At first, it’s good, but over time it drifts and is terrible! Interesting project though. Do you have any other reference materials for this project? Application? EV?

Hi Dan, the canbus won’t work if using self-define. Of note, in that mode, the Goodwe really struggles to track the SoC of the battery. This only worked for me for a short period before It would basically lose track. Which goodwe are you using? I ended up having to replace the GOodwe smart meter that come with my kit. Goodwe sent me a new one for free, which kind of indicates to me that its a known fault! Once I swapped the smart meter and reattached the RS485/Canbus connections, Batrium was able to ‘speak’ to the inverter and it actually did what it needed to do. THe inverter then used Batrium SoC to control itsself. Much more reliable and accurate than the self defined mode.

Hi Alfonso, I never really had much luck allowing the Goodwe inverter to track the Depth of discharge. It would always stuff up after a week or so. Hence the reason for using the CANbus of the BMS to report the results directly. I’d get a ZEVA BMS or Batrium and go the CANbus route.