# BMV randomly resetting to 100% **URL:** \ **Category:** Q&A and troubleshooting\ **Tags:** rv, bmv, parallel, diy\ **Created:** [12 November 2024 15:30 UTC](https://community.victronenergy.com/t/bmv-randomly-resetting-to-100/11411 "2024-11-12T15:30:24Z")\ **Posts on this page:** 16\ **Page:** 1
**Author:** ![reilym](https://avatars.discourse-cdn.com/v4/letter/r/51bf81/32.png) [@reilym](https://community.victronenergy.com/u/reilym)\ **Post date:** [12 November 2024 15:30 UTC](https://community.victronenergy.com/t/bmv-randomly-resetting-to-100/11411/1 "2024-11-12T15:30:24Z")
I have a BMV 712 monitoring my two 100 Ah LFP batteries wired in parallel in my RV for about 3 years now. Recently, I have noticed that the SOC will reset to 100% for no apparent reason. This month, I purposely fully charged the batteries, synced the BMV and then ran the batteries down to 90%. I disconnected all routes of charging (solar, alternator and shore) and watched it for several weeks. During that time, it stayed at 90% until one morning I checked it and it was at 100%. I have the unit programmed to “Keep SOC” on reset. I have tried swapping the shunt with another BMV and see the same confusing results. Any ideas would be appreciated. ---
**Author:** ![lxonline](https://dub1.discourse-cdn.com/victron/user_avatar/community.victronenergy.com/lxonline/32/25567_2.png) [@lxonline](https://community.victronenergy.com/u/lxonline)\ **Post date:** [12 November 2024 15:32 UTC](https://community.victronenergy.com/t/bmv-randomly-resetting-to-100/11411/2 "2024-11-12T15:32:08Z")
You might find the battery is randomly disconneting output and it is resetting to 100% ---
**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:** [12 November 2024 16:29 UTC](https://community.victronenergy.com/t/bmv-randomly-resetting-to-100/11411/3 "2024-11-12T16:29:14Z")
What absorption voltage do you charge at on your chargers and what is the “charged voltage” set to on the BMV. ---
**Author:** ![reilym](https://avatars.discourse-cdn.com/v4/letter/r/51bf81/32.png) [@reilym](https://community.victronenergy.com/u/reilym)\ **Post date:** [14 November 2024 05:25 UTC](https://community.victronenergy.com/t/bmv-randomly-resetting-to-100/11411/4 "2024-11-14T05:25:36Z")
I was kind of thinking it may be the built-in BMS on the lithium batteries, but am not quite sure how to confirm. I just upgraded to 4 new 100 Ah batteries. We’ll see if the problem persists. ---
**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:** [14 November 2024 08:35 UTC](https://community.victronenergy.com/t/bmv-randomly-resetting-to-100/11411/5 "2024-11-14T08:35:22Z")
If it is a Bluetooth capable BMS it may record the number of disconnects. ---
**Author:** ![reilym](https://avatars.discourse-cdn.com/v4/letter/r/51bf81/32.png) [@reilym](https://community.victronenergy.com/u/reilym)\ **Post date:** [14 November 2024 19:49 UTC](https://community.victronenergy.com/t/bmv-randomly-resetting-to-100/11411/6 "2024-11-14T19:49:58Z")
I have the charged voltage set to 14.2 and the AC-DC charger in the RV is set to 14.6. ---
**Author:** ![reilym](https://avatars.discourse-cdn.com/v4/letter/r/51bf81/32.png) [@reilym](https://community.victronenergy.com/u/reilym)\ **Post date:** [14 November 2024 19:53 UTC](https://community.victronenergy.com/t/bmv-randomly-resetting-to-100/11411/7 "2024-11-14T19:53:28Z")
Unfortunately, these are 9 year old batteries and do not have smart BMS, but the new ones do. What is curious is that this is a fairly recent phenomenon. Up until recently, the BMV worked as it should. I plan on putting it though some testing this weekend. ---
**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:** [14 November 2024 19:59 UTC](https://community.victronenergy.com/t/bmv-randomly-resetting-to-100/11411/8 "2024-11-14T19:59:45Z")
Those voltage settings look good so should not give synchronisation to 100% without proper charging occurring. ---
**Author:** ![tonyandkaren](https://avatars.discourse-cdn.com/v4/letter/t/c0e974/32.png) [@tonyandkaren](https://community.victronenergy.com/u/tonyandkaren)\ **Post date:** [19 April 2025 01:22 UTC](https://community.victronenergy.com/t/bmv-randomly-resetting-to-100/11411/9 "2025-04-19T01:22:17Z")
I have also had this problem. It seemed as if it had been powered off then back on, resetting itself. I replaced the wire from the battery to the shunt and that fix lasted for years. Now its acting up again. You might check the connections at both ends and also at the in line fuse. Hope that helps ---
**Author:** ![tonyandkaren](https://avatars.discourse-cdn.com/v4/letter/t/c0e974/32.png) [@tonyandkaren](https://community.victronenergy.com/u/tonyandkaren)\ **Post date:** [19 April 2025 22:39 UTC](https://community.victronenergy.com/t/bmv-randomly-resetting-to-100/11411/11 "2025-04-19T22:39:29Z")
I have battleborn batteries. They have a video to set up your monitor and I have done that but I can find nothing about reaction to disconnect except #16 soc relay - set to 50. How do you change it to keep soc? ---
**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:** [20 April 2025 07:03 UTC](https://community.victronenergy.com/t/bmv-randomly-resetting-to-100/11411/13 "2025-04-20T07:03:12Z")
See image towards the bottom, if your BMV has older firmware this choice may not be available. ![17451325165208313622249822135109](https://europe1.discourse-cdn.com/victron/original/3X/7/0/70acadf4faf539d57d689e3c528d3a2854de884a.png) ---
**Author:** ![tonyandkaren](https://avatars.discourse-cdn.com/v4/letter/t/c0e974/32.png) [@tonyandkaren](https://community.victronenergy.com/u/tonyandkaren)\ **Post date:** [21 April 2025 17:16 UTC](https://community.victronenergy.com/t/bmv-randomly-resetting-to-100/11411/14 "2025-04-21T17:16:56Z")
I called battleborn and they feel that its because I do not have the bluetooth version . They say this is a very rare problem. do you think that a newer monitor with the newer firmware would take care of this ---
**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:** [21 April 2025 17:50 UTC](https://community.victronenergy.com/t/bmv-randomly-resetting-to-100/11411/15 "2025-04-21T17:50:26Z")
It depends exactly on what model and firmware, I had a BMV 702 non Bluetooth version from 2020 that had the “keep SOC” choice with current firmware. Updating firmware would be my first thing to do if you have a route to do that. The SmartShunt and BMV 712 will have this option. The other option is to note the SOC down before turning off then you can manually update it. ---
**Author:** ![tonyandkaren](https://avatars.discourse-cdn.com/v4/letter/t/c0e974/32.png) [@tonyandkaren](https://community.victronenergy.com/u/tonyandkaren)\ **Post date:** [27 April 2025 00:28 UTC](https://community.victronenergy.com/t/bmv-randomly-resetting-to-100/11411/16 "2025-04-27T00:28:57Z")
I don’t have bluetooth or a dongle but can I connect it to a computer to update it? ---
**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:** [27 April 2025 08:09 UTC](https://community.victronenergy.com/t/bmv-randomly-resetting-to-100/11411/17 "2025-04-27T08:09:12Z")
You can according to the manual, you will need a VE Direct to USB cable. I have never done this myself. _Note that on Windows, VictronConnect cannot use Bluetooth Smart to connect to a product. Other connection methods, such as USB, or LAN and WiFi do work properly._ > **[4. Phone, tablet and laptop compatibility](https://www.victronenergy.com/media/pg/VictronConnect_Manual/en/phone,-tablet-and-laptop-compatibility.html)** ---
**Author:** ![CharlieJ](https://avatars.discourse-cdn.com/v4/letter/c/b5ac83/32.png) [@CharlieJ](https://community.victronenergy.com/u/CharlieJ)\ **Post date:** [27 April 2025 20:32 UTC](https://community.victronenergy.com/t/bmv-randomly-resetting-to-100/11411/18 "2025-04-27T20:32:15Z")
I prefer not to choose “Keep SOC”. My reasoning is that if there is a disconnect for a few minutes/hours, than the SOC may still be accurate. If the duration is longer the true SOC may not be what it was when the disconnect occurred. I prefer “Clear” which will cause the SOC to be unknown until the next charge cycle.