Measuring Voltage Bank 2 by Compass Marine How To

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09-JAN-2011

Measuring Voltage Bank 2

The "VS" screen tells you the voltage of a second bank. Seeing as I used one battery for this illustration the meter is showing the same voltage as the the "V" screen.

I should mention that there have been a couple of people on the boating forums complaining that the V & VS screens, even when fed from the same source voltage are not in sync or well calibrated. This sample happens to be properly calibrated. An experienced sailor and electrical engineer on SailboatOwners.com has had two units with voltage readings from .01 - .03 volts off when sensed from the identical source.

Is a variance of .01 to .03 volts a big deal? No, not at all, but I just wanted to make you aware so that you don't panic if your V & VS screens do not completely agree. Victron might need to do some better QC with the V & VS screen readings!

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Drew Jackson 29-Jan-2018 13:13
I also have the annoying experience of a 0.2v discrepancy between V & VS when connected to the same battery with two 702's sourced locally here in Australia.
But now I have a more worrying problem.
After 2yrs of accurate measurement my BMV702 current draw readings for each my accessories are suddenly 20% lower then they used to be. Any ideas?
Would the problem be in the circuit board on the shunt, or in the monitor?

Drew Jackson		29-Jan-2018 13:13
I also have the annoying experience of a 0.2v discrepancy between V & VS when connected to the same battery with two 702's sourced locally here in Australia. But now I have a more worrying problem. After 2yrs of accurate measurement my BMV702 current draw readings for each my accessories are suddenly 20% lower then they used to be. Any ideas? Would the problem be in the circuit board on the shunt, or in the monitor?