# BMV 712 Smart 100% state of charge too early **URL:** \ **Category:** DIY\ **Tags:** lithium\_battery, professional, victron\_community, marine, cerbo\_gx, multiplus-ii, multiplus\ **Created:** [24 June 2025 18:50 UTC](https://community.victronenergy.com/t/bmv-712-smart-100-state-of-charge-too-early/37121 "2025-06-24T18:50:02Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![pwfarnell](https://dub1.discourse-cdn.com/victron/user_avatar/community.victronenergy.com/pwfarnell/32/2341_2.png) [@pwfarnell](https://community.victronenergy.com/u/pwfarnell)\ **Post date:** [25 June 2025 08:16 UTC](https://community.victronenergy.com/t/bmv-712-smart-100-state-of-charge-too-early/37121/2 "2025-06-25T08:16:59Z")
Your settings look fine. If it has started at 100%, pulled out 300Ah and recharged 300Ah then of course it will read 100% again, this is how it works, by counting energy in and out. The synchronisation settings are to make it go to 100% if the battery gets full when it is displaying say 90%. You need to ignore the SOC for the moment and carry out a full charge right through absorption to float then the 100% will be correct. Batteries often arrive at 40-50% so the initial SOC is wrong. You need that absolutely full charge to float to get everything aligned. The other explanation is incorrect wiring of the shunt. See > [@Shunt / battery monitor not reading the correct SOC/ Amps, missing solar, decreasing daily or other misreading problems](https://community.victronenergy.com/t/shunt-battery-monitor-not-reading-the-correct-soc-amps-missing-solar-decreasing-daily-or-other-misreading-problems/87): > > This topic covers the SOC / Amps reported by BMV battery monitors, SmartShunts, Lynx BMSs and Lynx Shunts and will just be called shunt below. It is also assumed that the shunt is monitoring the domestic / house / cabin battery bank and not engine start / bow thruster / winch / caravan mover battery banks. The problems may be one or more of the following The SOC decreases daily despite the solar charger or other charger(s) working. The SOC increasing when discharging and falling when charging… --- _[View the full topic](https://community.victronenergy.com/t/bmv-712-smart-100-state-of-charge-too-early/37121)._