SmartShunt measurements as reference

DIY
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1

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BMS set CVL to 55.20V. Inverter charges to 55.20V but actually SmartShunt shows 55.05V.

I assume that Inverter readings are not correct. Is it possible to use shunt’s voltage as a reference? Or is it possible to slightly increase charge voltage over CVL?

I know that there’s V-sense input in the inverter but manual says it used to compensate voltage drop. In my case distance between shunt and inverter less than half of meter and I use 70 mm2 wires. Also you can see that current is less than one Ampere.

SVS Forced off. Even if it would be ON it is not clear the shunt’s voltage will be used or from BMS. I trust more to SmartShunt.

2

How is your JK-BMS connected to the Cerbo?

3

Via CAN port. Or what do you mean?

4

The 3rd party serial driver used to connect JK BMS allows the use of smart shunt data. It doesn’t apply in your case.

5

Bms voltage reading can be off, the jk bms in my battery was off by 0.4 Volts: 54.8 vs 55.2 Volts, I have adjusted this reading (calibrating) with a very high accuracy DC voltage meter, a Victron shunt is also DC voltage meter of very high accuracy.

Btw, you can also calibrate the current measurement of a jk bms with an Victron shunt..