Ive diy installed the system by myself, i know what im doing as i am an electronics engineer, the system has been working off grid since last Autumn, and its only today that this error showd up.
I have read the manual regarding voltage sensing, but i don’t have any voltage sensing wires connected to the MultiPlus-II, so it only knows the voltage from the main dc terminals, so why would it suddenly give a voltage sense error message.
Ive come on here for help and advice, thats why we have this forum right! There are no professionals in my area i could call, but im sure there are many on here, so please be kind and help me get to the bottom of this issue.
Naturally im concerned and not sure where the so called voltage sensing takes place as i have 8 batteries all connected in parallel on busbars, leading to a lynx powerin, then a lynx shunt then a lynx distributor then to the MultiPlus-II. There were never any separate voltage sensing wires connected, i assume the sensing takes place within the MultiPlus-II?
The lynx shunt and mppts have network cables connected to the cerbo gx and the batteries bms’s are all connected in series with network cables and connected to the cerbo gx too. The system is running perfectly with soc, voltage and amps showing correctly on the display, yet i have the voltage sense error.
The voltage sense pins are connected to the input of some A/D converters.
If they are left NC, internally, the info is taken from the battery terminals through some hundreds kilo resistors.
At such high values, depending on the near EMF perturbations, that info can be, sometimes, false.
And thank God, the switching FETs and that big toroidal hunk of metal inside generate a lot of EMI. 
To prevent some false readings, I would connect the pins 11 and 12 from the “I” connector to the battery terminals.
In setup you can disable the v-sense inputs.
It’s worth a try.
I may be wrong, but you can disable only the alarms and warnings about voltage sense.
And Shared voltage sense from DVCC it’s a different thing…
Yeah, but he is getting an alarm…
Then I probably misread your “disable v-sense inputs” 
Sorry, English not my first language…
And i have the setup installed on my pc in german and writing on my mobile in english from memory 
So before i disable the v sense, should i connect pins 11 and 12 of the I connector to the batteries busbars +and - terminals?
Once this is done, do i need to adjust any new parameters in VE config?
Also is voltage sense disabled withon ve config or on the cerbo?
No, you don’t have to touch the pins or adjust parameters.
Only disable in ve.config.
Ok, ill do this tomorrow, as im guessing the inverter will reboot, which is not good tonight.
Why would this error have suddenly shown up though,? as i havnt altered anything
Well, things do break spontaniously, i earn my living on this fact.
Well i must say you and Alex jave been very helpful, thats all i wanted in the other thread that was closed on me.
Ill do this tomorrow and report back.
Hi Alex, Just a note: The V Sense inputs are connected to B+ and B- with resistors of about 100 ohms, not in the 100k ohm. This can typically be measured when the inverter is not powered up. So the same A/D converters are used to measure the battery voltage. If the V Sense is connected externally, this path is going to be <1 ohm, so the 100 ohm resistors are effectively ignored.
Thanks for correcting me.
My eyes seem to have started to play tricks on me… 
Ha! Just wait till your brain does too - like mine…
The reason for the 100 ohm resistors, - and they are quite high power rated, is that the V-sense connection is also used as a pre-charge function for the inverter. This is useful in extending the life of the reservoir caps in the inverter, particularly for the 48V devices. Here, the inrush current can be really high, so the pre-charge wiring SHOULD be used at this volt level. Some Li batteries, i.e. pylontech, have a soft start function built in, but in complex systems having to shut down the entire 48V bus just to put an inverter on line can be a pain.
Quit whining, you guys are a fraction of my age.
“>65?”
- And still active as freelancer
First thing to do, is use a good dvm to measure any voltage difference between the +sense input and the B+ terminal, likewise the V- sense input and the B- terminal. This should only be a few 10’s of mV or less.
If all is good, then these sense inputs can be connected to the Busbars via a 2A Fuse. (+ to+, - to-).
The fuse is to protect the lighter gauge wire used for this connection.
If there is a big voltage difference, then if you can power down the inverter and isolate it from all voltage sources, the measure the resistance from the sense input to the battery terminal of the inverter. this should be ~120 ohms (on a 24V inverter, may be different on the 48V models, I’ve not measured one).
This will give an indication of any fault.
Before i dive in today and make adjustments in VE config, can anyone please tell me which tab the voltage sense “on off” option is located?