# Victron MP2 freeze after low battery alarm

**URL:** <https://community.victronenergy.com/t/victron-mp2-freeze-after-low-battery-alarm/16039>\
**Category:** DESS\
**Tags:** 3-phase, dess, vrm, diy\
**Created:** [20 December 2024 15:39 UTC](https://community.victronenergy.com/t/victron-mp2-freeze-after-low-battery-alarm/16039 "2024-12-20T15:39:05Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![Markok](https://avatars.discourse-cdn.com/v4/letter/m/f04885/32.png) [@Markok](https://community.victronenergy.com/u/Markok)\
**Post date:** [20 December 2024 15:39 UTC](https://community.victronenergy.com/t/victron-mp2-freeze-after-low-battery-alarm/16039/1 "2024-12-20T15:39:05Z")

</div>

I have three Victron MP2 installed to 3-phase system and three Pylontech US5000 battery. System works well about half of year, but now system give low battery alarm almost every day. I use dynamic ESS and max discharge power is 3500W and SOC low limit is set to 20%. What could be the problem? I have got low battery alarm sometimes at summer too, but Victron never before freeze after that. VRM show that connection is okay, but any value not change in dashboard and I can’t use remote console. I set low battery limit using VE.Config like Pylontech manual said, but must I set limit lower? I think that 3500W discharge power is not too much to three Pylontech US5000 battery.

---

<div class="post-metadata">

**Author:** ![va13](https://dub1.discourse-cdn.com/victron/user_avatar/community.victronenergy.com/va13/32/6197_2.png) [@va13](https://community.victronenergy.com/u/va13)\
**Post date:** [20 December 2024 17:45 UTC](https://community.victronenergy.com/t/victron-mp2-freeze-after-low-battery-alarm/16039/2 "2024-12-20T17:45:01Z")

</div>

DESS has a minor bug. When battery SOC is below “Minimum SOC unless grid fails” setting. DESS could not recover.

Cause is self consumption of the inverters which is not recognized by DESS. I call it vampire drain.

Resolve by temporarly switching to ESS, or set “Minimum SOC unless grid fails” below battery SOC while in DESS mode.

I will write more about this on the weekend along with a little script which fixes the problem unless fixed by victron.

It will work like this:

 ![Screenshot_2021220-184720_Firefox_Beta](https://europe1.discourse-cdn.com/victron/original/2X/8/891054ee8be52fbb696f9ab9f1983d64df09c516.png)

---

<div class="post-metadata">

**Author:** ![Markok](https://avatars.discourse-cdn.com/v4/letter/m/f04885/32.png) [@Markok](https://community.victronenergy.com/u/Markok)\
**Post date:** [20 December 2024 18:36 UTC](https://community.victronenergy.com/t/victron-mp2-freeze-after-low-battery-alarm/16039/3 "2024-12-20T18:36:34Z")

</div>

Thank you very much. Would it be fixed if set DESS “target SOC” value higher than “Minimum SOC unless grid fails” value.

---

<div class="post-metadata">

**Author:** ![va13](https://dub1.discourse-cdn.com/victron/user_avatar/community.victronenergy.com/va13/32/6197_2.png) [@va13](https://community.victronenergy.com/u/va13)\
**Post date:** [20 December 2024 19:43 UTC](https://community.victronenergy.com/t/victron-mp2-freeze-after-low-battery-alarm/16039/4 "2024-12-20T19:43:26Z")

</div>

Maybe with @dognose HACK and adhoc charge. For shure with manual charge via ESS (disable DESS) until battery SOC is high enough, than enable DESS again.