question

gerry-mcg avatar image

How to connect SmartBatterySense to setup with BMV

Ive added a SmartMatterySense (SBS) to my system so I can monitor battery temperature when solar charging my lithium batteries.

The SBS instructions says to connect +ive and -ive wires to batter terminals, but how does this work when I have a BMV-700 with shunt attached to the -ive battery terminal?

common wisdom is all -ive lead should be connected to ground side of the shunt .

I appreciate the SBS only draws a very low current (20mA), however should I connect SBS -ive wire to the -ive battery terminal (as per instructions) or to the ground terminal of the BMV shunt (as per common wisdom) ?

Thanks

Gerry

BMV Battery MonitorSmart Battery Sense
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1 Answer
kevgermany avatar image
kevgermany answered ·

Load needs to go to the ground side of the shunt. I don't see this as load. But it won't make much difference either way. The BMV isn't that accurate.

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