hi,
maby helpfull this
http://www.rec-bms.com/datasheet/UserManual_REC_Victron_BMS.pdf
https://www.victronenergy.com/upload/documents/VE.Can-registers-public.pdf
https://community.victronenergy.com/storage/attachments/21873-simp-bms-setup-manual-v025.pdf