question

bjsorensen avatar image
bjsorensen asked

SmartShunt 500a Won't Allow Manual State of Charge

Hi all,

I have a SmartShunt 500a installed with 3 - 100Ah LiFePO4 batteries. In the Victron app, I have applied the default battery settings for those batteries. For the past few months, the SmartShunt operated "normally". However, I've noticed 2 unique things that I haven't been able to figure out.

  1. I tried updating the state of charge (SOC), but the Victron app won't accept my changes. It takes whatever I enter and automatically changes it to 100%. I know that my batteries are not at 100% capacity for several reasons.
  2. The Victron app shows 20 total synchronizations, although I've only manually synchronized 3 or 4 times. This entire system, including the batteries, is new as of May 2021 and I have not cycled the batteries more than 3 times. So, I'm curious why it synchronizes so much. Is that "random" synchronization related to the issue I'm having with manually setting the SOC?

I'm happy to attach any images of the Victron app and I welcome any thoughts. Thanks!

SmartShuntSOC
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1 Answer
Mike Dorsett avatar image
Mike Dorsett answered ·

Try checking the 'charged voltage' setting of the shunt. If the battery exceeds this voltage, the shunt will think it's fully charged, so If it is too low, the shunt will keep synchronising every time the voltage crosses this threshold. Try raising it 50 - 100mV to see if this fixes the problem.

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