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How to connect two different Victron MultiPlus (12V & 48V) to one CerboGX or MK3-USB via VE.Bus ?
CerboGX got two VE.Bus ports, but when I connect VE.Bus port of 12V Multiplus to VE.Bus port at CerboGX and the same with 48V Multiplus to second VE.Bus at CerboGX both invertors got alarm and swithed off.
When I connected (but at running stage at both invertors) VE.Bus ports connect in series to one VE.Bus port in CerboGX the same situation - both invertor shows red alartm and swith off.
The Cerbo only has one VE.Bus but with two parallel ports (same for the VE.Can and BMS-Can ports).
The 2nd VE.Bus port can be used to connect a MK3 for programming.
To connect a 2nd VE.Bus system you need to use a MK3 connected to the USB port.
But you don't have the full functionality with that 2nd system.
The GX device shows the MultiPlus as "blocked" as long as it "sees" that there is VE.config communication.
So you always have to disconnect the MK3 at last from the PC.
There is also the MultiPlus-II GX or the EasySolar-II GX, they have a build-in GX device and you can't disconnect that easily.
*you maybe get an error if you use auto detect for the COM port in VE.config but if you select the correct COM port manually it works perfect.
The cerbo can only control one inverter (or system of inverters) from the VE bus.
You want to connect a second VE bus inverter that is totally different to the first one to the cerbo.
The suggestion from @Matthias Lange - DE is the correct one. To connect the second inverter for monitoring purposes only to the cerbo you have to use the MK3 and connect it to the cerbo through a usb port - there is no control like ESS over the second one.
You cannot daisy chain them at all through the VE bus for shared or other information.
For programming etc remove both devices from the cerbo and use the MK3.
Excluding setups like 3-phase, parallel, etc., you can not connect more inverters to a single Cerbo GX VE.Bus, even with identical Multipluses.
You can connect the second Multiplus to Cerbo GX using a MK3-USB interface (don't use the USB port next to the HDMI port), for some functionality.
Check the manual for details.
But CerboGX (as a host) has two VE.Bus ports. Why, If I can not use them independent of each other?
Do I understand correctly that only one chain of identical MultiPlus can be connected in serial to the CerboGX to one port VE.Bus only, and the second VE.BUS port is only for beauty (unusable at all)?
