First thing I'd do is eliminate RPi issues.
Fit an RPi UPS shield with 18650 cells.
Not sure what the options are, but set up some logging to monitor WiFi, internet and the Victron data. Cos at the moment you've not got enough info to go on.
You said VRM stopped working. I assume that's getting fed via WLAN and internet. Sorry if I misunderstood.
Pi via buck boost - if you're powering the Pi from the batteries you're monitoring, it eliminates this.
Really I'm second guessing what you're doing/how it's set up because you're not giving us much to go on.
If the Pi is getting some data from the battery monitor the serial connection or the Pi isn't the problem. Sounds like the shunt/BMV fails after a few hours? Weird problem.
SOLVED... I think
I changed the USB/serial, and once changed, I plugged the USB into a different Pi port. It has run 24hrs now without a hiccup, when before it was only running 2 to 4 hrs
Not sure which of the 2, or maybe both... or neither.... made the difference. More time should tell
Update... not good @#$%
Everything has worked from my last post on Dec 04 to now. I have the same but different issue. Before and now the RPi was not reporting battery SOC.
NOW the SOC is not showing on Victron Connect either! The SOC was showing in the VC app before
Do I have a bad smart shunt?
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