MultiPlus SOC dropping when charger in Storage mode (UPS application) - Chute de SOC en Storage Mode

DIY
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1

Hello,
I am using Multiplus with AGM battery for backup (UPS) function.
The SOC of the battery is decreasing when Storgae Mode is activated.
I found a similar discussion on the archives, which has not been completely solved :
https://communityarchive.victronenergy.com/questions/1273/multiplus-soc-dropping-no-load-storage.html

Storage mode Vs chute de SOC (07-11-24)
Storage mode Vs chute de SOC (07-11-24)1600×2749 409 KB

As anyone experienced a similar issue ?

2

I had this same issue with a multiplus 12/1200. Rather than RMAing and waiting on replacement or voiding the warranty and doing the hotwire trick that’s at the bottom of the archive post. I simply added a smartshunt to the system. Sure the ACIN and ACOUT are still slightly different at times but the SOC never moves unless current is drawn from the battery.