Victron energy Venus GX Manual page 73

Additionally this information is also documented on the 'Unit ID mapping' tab in the Modbus-TCP excel
sheet.
For the overall system data, look for com.victronenergy.system in the excel sheet, and use Unit-ID
100.
Note that both Unit-ID 0 and Unit-ID 100 map to the same internal address. We recommend to use ID
100, since many ModbusTCP clients and PLCs do not work with ID 0.
2.3 Register addresses
The list of available registers is in an Excel sheet, available for download on the Whitepapers section
on our website.
Besides registers for connected Chargers, Inverters, and other products, there is also a set of registers
that represent the entire system: com.victronenergy.system. This service is also where the System
Overview pages in the GUI, and the VRM Dashboard get their data.
Note that not all list registers are available for each device. For example a BMV Battery Monitor has
lots of readings: historical data such as maximum/minimum, for example. A canbus-connected lithium
battery might not have all those parameters available. There is no information available on what type
of product has what data available.
Use this table to map the definition in the 'dbus-service-name' in the Excel sheet to a product type:
Device class
com.victronenergy.vebus
com.victronenergy.solarcharger Solar chargers (both VE.Can and VE.Direct connected) 771 to 790
com.victronenergy.pvinverter
com.victronenergy.battery
Product types
Inverters (VE.Bus), Multis, and Quattros
Grid-tie PV Inverters (Fronius, or Energy Meter)
BMVs, CAN-Bus BMS connected batteries
Extra parameter set for Lynx Ion and Lynx BMS
product family
Registers
3 to 60
1026 to 1039
259 to 319
1282 to 1301