good evening everyone, I need to have my cerbo gx read the voltage of a second battery. based on the value of this voltage, via nodered, I perform certain actions. can you tell me a voltage sensor that works at 12v compatible with the cerbo?
I had it, but I still had 2 quite different socs: soc from the smartshunt and soc from the bms. So I decided to eliminate the smartshunt and read the soc directly from the bms. Alternatives to have 2 separate voltage readings?
so you would rely on the smart shunt and not the bms? I read many cases of misalignment where the smart shunt reads percentages over 50% but the voltage at the poles is less than 50%… we are in a sea of doubt!
That is because they did not set the SmartShunt up right, especially charged voltage.
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Depends on the battery, the BMS does more than just calculate SOC, it also sets charge/discharge limits and controls the chargers.
If we are talking about well known, supported/certified batteries, for the most part they are more accurate than any shunt you can adjust.
When you head into DIY/drop-in country, that is a different story.
The lithium install base is enormous and works just fine under purely BMS control.
Those that don’t tend to be obvious.
as for the main battery, it is a self-built battery with catl cells and bms jk. but in this discussion I was interested in knowing if it was possible to mount an additional voltage sensor directly on the deer to have the reading of 2 voltages inside the venus system. according to your knowledge, the only way is to mount a smart shunt?
For a second reading, a shunt works, it won’t be configured as the system BMV though.