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FoxESS "new" Devices CAN protocol

Posted: Sun Mar 15, 2026 12:12 pm
by skr
hey all together,
I'm currently trying to interact with the CAN interface of an EP11 HV battery pack - it seems to have a different CAN command set as the older LV battery packs...
has anyone decoded it so far?

the specific problem is that I can't set the battery pack's HV terminals to "ON" state, only have the idle-voltage of roughly 100V there and ofc no power in/out capability :-/

would be happy if someone got news on this (v2?) protocol

greets
Simon

Re: FoxESS "new" Devices CAN protocol

Posted: Mon Mar 16, 2026 1:52 pm
by Dave Foster
You can have a look at this, it was done some time ago but hopefully should provide a good starting point https://github.com/FozzieUK/FoxESS-Canbus-Protocol