There are 3 controllers on the VE Network
Phoenix 50A 240V Charger
Phoenix Shows identical Voltage to BMV
150/70 Shows a very minor difference (no more than 0.02V) to the BMV
100/50 is out around 0.3V to the BMV
I think the issue is that the 100/50 has started to lose the VE Blu-tooth connection - I have watched the BMV connection to it and it times out and then re-connects from time to time. This unit has been running for well over a year and I have made no changes to the system or have added anything that would interfere with the Blu-tooth
I would have also thought that the 150/70 should show identical voltage like the Phoenix? Although the 0.02V difference is not a problem.