Smart Shunt 500A not showing battery state

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gschultz asked May 29, '21

Smart Shunt 500A not showing battery state

My Smart Shunt in my 2 battery RV setup (wired as below) is not remembering the last charge setting when the bluetooth connection is broken. For example, batteries are 100% charged and the Android Victron App is connected to the shunt. In the RV, I run out both slides and the fridge is on (draws about 7Ah) overnight. In the morning I start the app to check the remaining battery capacity and it shows 100%. How the heck is that possible?!? I KNOW that I've drained some of the battery overnight. What am I doing wrong?

SmartShunt

smart-shunt-500a-wiring.jpg (55.5 KiB)

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klim8skeptic ♦ commented · May 29, 2021 at 11:59 PM

Does your fridge work with the battery cut-off switch turned off?

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Answer 1 · 2021-05-30T03:33:23Z

Paul B answered · May 30, 2021 at 03:33 AM

Check the charged voltage setting

my guess is that the battery voltage is higher than this setting if it is then the SOC will stay at 100%

on a 12 volt system the voltage is usually set at 14 volts, theis is the tripper for the display to change to 100% when the battery is full

also charged detection time and tail current affect when its triggered as well

Also the battery ground is not connected correctly

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1622345914491.png (230.8 KiB)

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