Bad reading of battery voltage on Shunt

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question

joholi asked Sep 21, '21

Bad reading of battery voltage on Shunt

Hello,

I have a smart shunt connected to my main battery. Everything if fine. I have decided to connected the engine battery on the other input of the smartshunt using the extra cabble that was supplied. the reading of the engine battery is only displaying 3V although the tension is 1 about 13 volts on the engine battery…

I have conneted then this engine cable to the main battery, I have the same reading of about 3 volts, although the reading of the main battery is reading about 13 volts on the top part of the screen on the app:

I have tried to change the setting from engine battery to no input then back to engien battery, still the same.

Any idea of what it could be? I have had this shunt connected fr more than one year to the main battery with no reading issues, why the reading would be wrong on the engine battery?

thanks

SmartShunt

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Answer 1 · 2021-09-21T20:02:03Z

Alexandra answered · Sep 21, 2021 at 08:02 PM

@Joholi

The instructions here, point to a number of potential points of faliure.

Bad connection on fuses.

Ferrule pins not seated correctly. Or lug not making good contact on battery side.

Bad connection of engine battery to the negative of the shunt.

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joholi commented · Sep 21, 2021 at 08:04 PM

Thank you for your reply, this is the exact pocedure I have followed

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Alexandra ♦ joholi commented · Sep 21, 2021 at 08:10 PM

@Joholi

How good is the shared ground connection?

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joholi commented · Sep 21, 2021 at 08:13 PM

All the negative connections are properly and firmly connected AFTER the smart shunt

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