Bob, your system architecture and actual measurement points need to be specified.
If you're measuring Battery voltage on the source side of the master contactor,
observing system voltage on your EIS, and there's any sort of isolation diode
in the system somewhere, that would easily account for for the voltage difference.
To get an honest number, you need to measure on each side of the contactor
itself. Or, just measure across the two terminals & look for zero volts.
Charlie
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Charlie
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