# Voltage of new lithium battery keeps dropping

**URL:** <https://community.victronenergy.com/t/voltage-of-new-lithium-battery-keeps-dropping/57059>\
**Category:** DIY\
**Tags:** rv, beginner, multiplus-ii, lithium\_battery\
**Created:** [25 April 2026 06:41 UTC](https://community.victronenergy.com/t/voltage-of-new-lithium-battery-keeps-dropping/57059 "2026-04-25T06:41:52Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Brum2611](https://avatars.discourse-cdn.com/v4/letter/b/ccd318/32.png) [@Brum2611](https://community.victronenergy.com/u/Brum2611)\
**Post date:** [25 April 2026 06:41 UTC](https://community.victronenergy.com/t/voltage-of-new-lithium-battery-keeps-dropping/57059/1 "2026-04-25T06:41:52Z")

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Hi,

I build my electrical system about 3 weeks ago, and since 1 week i’ve been slowly losing voltage until my whole system shuts off until I charge again. Graph included.

From what ive read it could mean a dead battery, but it a completely new lithium battery.

For now im charging only from the grid, planning on adding solar panels.

Anyone know what is going on?

 ![Screenshot_20260425_083607](https://europe1.discourse-cdn.com/victron/original/3X/2/7/274e1b27c9ba0ec2a30bf39ca0580590c2593a69.jpeg)

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**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 April 2026 08:11 UTC](https://community.victronenergy.com/t/voltage-of-new-lithium-battery-keeps-dropping/57059/2 "2026-04-25T08:11:40Z")

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More info required, what size battery, what are your loads, are you sure you are getting to 100% with charging, what charge rate do you use. Default SmartShunt settings may not be right and you could be indicating 100% before the battery is full. What are your SmartShunt settings. Do you have any loads connected to the battery negative directly.

See

> [@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…

And

> [@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…