# Batteries shutting down long before capacity is consumed **URL:** \ **Category:** Q&A and troubleshooting\ **Tags:** rv, lithium\_battery, vrm, diy\ **Created:** [29 October 2025 16:16 UTC](https://community.victronenergy.com/t/batteries-shutting-down-long-before-capacity-is-consumed/47869 "2025-10-29T16:16:44Z")\ **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:** [29 October 2025 16:50 UTC](https://community.victronenergy.com/t/batteries-shutting-down-long-before-capacity-is-consumed/47869/2 "2025-10-29T16:50:17Z")
Have you adjusted the BMV settings particularly the charged voltage. The default setting with solar charging, (especially at lower light levels) can result in the SOC synchronizing to 100% before the batteries are full. Have you also reduced the capacity to 500Ah. The attached FAQ covers the correct settings. A second FAQ covers wiring, the chassis connection is often a source of errors on RVs and boats resulting in some loads not being measured, so the batteries run out quicker than the SOC suggests. Are your batteries balanced, hopefully you have Bluetooth batteries so you can see individual cell voltages. An unbalanced battery will display as 100% SOC before it is full and have low voltage before the SOC says it is empty. Unbalanced batteries have a lower effective capacity than nameplate. Cold batteries also have lower effective capacity. > [@Battery monitor jumping to 100% or reporting a high SOC with low Volts / the BMS shuts down](https://community.victronenergy.com/t/shunt-battery-monitor-jumping-to-100-or-reporting-a-high-soc-when-the-volts-are-low-and-or-the-bms-has-disconnected/88): > > This topic covers the reported SOC being out of sync with the actual battery voltage or state. It covers 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 and is often linked to mobile applications with small solar systems. The SOC jum… > [@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/batteries-shutting-down-long-before-capacity-is-consumed/47869)._