Hello,
Any idea what could be wrong on DC bus? Shunt disagrees with readings from BMS and Multiplus. At the same time multimeter indicates same voltage as shunt, thus shunt is correct.
But in your other post, they seem to be the same…
Did you modified something in between?
I disabled DVCC in Cerbo momentarily and enabled it back.
Maybe a loose connection ? I had once a MPPT giving a different voltage than the others, and it was a loose connection, which was also visible with the thermal camera.
The system has nothing to do but report the battery voltage it is told to. So in thet regard the BMS is the one responsible for that.
Did you reboot the cerbo after the enable and disable of the DVCC?
What is the MP battery terminal read with a DMM compared to the inverter? Are you sure the connections there are good (no insulation clamped etc)
Did you reboot the cerbo after the enable and disable of the DVCC?
Yes.
Battery terminal voltage = shunt voltage = multimeter voltage.
I did not take MP terminals voltage, but I’m sure they are equal to DC bus voltage.
Can check tomorrow just in case.
Connections are good.
Checked MP DC terminals. Voltage = DC bus voltage.
The voltage readings seem to be extremely close to me. The shunt and battery are .01v apart from two independently measured sources. Even the multiplus is very close. I think we are expecting too much precision to think that three independent sources will read exactly the same down to two decimal places.