scheinheilig avatar image
scheinheilig asked

Multiplus 3k Old Model (FW 19xx) enough for intendend use?

Hi, i just bought a used MultiPlus 3k 230V with the old Micro an FW 1909143. (Year 2012)

I want to understand, if it is sufficant for my intended use or what restriction I have compared to a new one (Micro 26xxx)?

Planned use:

  • Install in campervan
  • With 2 smartsolar Mppt and smartshunt (500a)
  • 200ah lifepo4
  • Victron ve.Bluetooth adapter --> found out this is not possible
  • Cerbo GX and Touch?
  • "Intelligent" Battery/Solar dependant use of Line (2) for AirCon or Fridge (not a must)

Which Firmware should be prefered VirtualSwitch (1xx) oder Assistant (2xx)?

I still have some caveats against the old one ...

Thank you,


MultiPlus Quattro Inverter Chargercampervanvebus
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1 Answer
hvalentim avatar image
hvalentim answered ·

Take a look here >>

You definitely want to upgrade the firmware to 1910209 (latest Assistant Firmware). Somehow with firmware 1910159 (latest Non assistant) the Cerbo GX (which is what I am using, the Multiplus being connected through the original VE.Bus yellow cable - basically a standard ethernet cable for that matter) is unable to read values in realtime from the Multiplus (hangs the reading after ~3 reads). Works fine at that level with 1910209.

A few things I have found, additionally:

  1. Upon activating DVCC, VRM constantly shows me this: "System overview - GX Error #48 DVCC with incompatible firmware: Warning". Nevertheless doing what I expect: read battery temperature using the original Multiplus sensor plugged to the Cerbo and sharing it with the SmartSolar charger (STS); reading current and volts directly from battery terminals using the SmartShunt and sharing them with the charger (SCS and SVS). I reckon it is not sharing these values withe the Multiplus, hence the warning.
  2. An option exists in VRM to remotely download the settings file from the Multiplus, edit them in VEConfigure 3 and reupload them (which is convenient).
  3. Notwithstanding, VRM offers an option to switch the Multiplus operation mode between Charger, Inverter, On and Off as well as to switch on and off Relay 2. I must say I haven't tested those.

My general impression is that it works fine, albeit the communication with the Cerbo being mostly unidirectional (read values only) and probably missing some functionality to be found on models capable of running more recent firmware.

You can always program Line (2) using the Multiplus standalone settings by adding an Assistant, I suppose (option 2, above).

A final word of caution: the CerboGX does not support upgrading the firmware on the old Multiplus. You will need a VE-Bus to USB adapter for that matter (I used an MK2).

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