# Multi II 3000/48 GX with CFE5100 on cable A

**URL:** <https://community.victronenergy.com/t/multi-ii-3000-48-gx-with-cfe5100-on-cable-a/22943>\
**Category:** DIY\
**Tags:** backup, multiplus\_2\_gx, beginner, victron\_community, vrm\
**Created:** [21 February 2025 20:14 UTC](https://community.victronenergy.com/t/multi-ii-3000-48-gx-with-cfe5100-on-cable-a/22943 "2025-02-21T20:14:39Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Ted.Spancer](https://dub1.discourse-cdn.com/victron/user_avatar/community.victronenergy.com/ted.spancer/32/24742_2.png) [@Ted.Spancer](https://community.victronenergy.com/u/Ted.Spancer)\
**Post date:** [21 February 2025 20:14 UTC](https://community.victronenergy.com/t/multi-ii-3000-48-gx-with-cfe5100-on-cable-a/22943/1 "2025-02-21T20:14:40Z")

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Hello everyone,

I was looking for a alternative to UPS situation at my place, and came up with a Multi + LFP battery thanks to a friend that used Victron in pass.

From my understanding (and from what seller was saying) I should install Multi, connect battery, connect them with Typ A or B (both works) and this should work.

From my understanding BMS from CFE5100 battery should communicate to Victron how much charge etc… I installed Multi, configured few things via “virtual” panel thanks to build-in GX support.

Everywas fine until my friend came, launch VE Configure, set many-many settings base on his (bigger) installation and upload it to Multi. The BMS was showing 50% of battery, yet Victron was showing 100% but still was charging it… I have been studing those settings that looks a bit of from what I read on tech spec for that battery…

I just want it to work as UPS nothing facy like self-consumption etc… UPS without pushing to grid.

Should I factory reset that Victron, plug BMS to VE.CAN and it should autoconfigure it by it self ?

If not is anyone willing to tell me what should I configure (I read that VE Configure is being deprecated for the VRM solution, while not having Assistance and VSwitches) so I was thinking that setting all those % V shouldnt be needed ? or I’m totaly wrong and this is the way ?

Edited: He configure Virtual Switches - but I dont have any generator or anything just AC Input, Battery and AC Output1 nothing more

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<div class="post-metadata">

**Author:** ![Ted.Spancer](https://dub1.discourse-cdn.com/victron/user_avatar/community.victronenergy.com/ted.spancer/32/24742_2.png) [@Ted.Spancer](https://community.victronenergy.com/u/Ted.Spancer)\
**Post date:** [23 February 2025 12:07 UTC](https://community.victronenergy.com/t/multi-ii-3000-48-gx-with-cfe5100-on-cable-a/22943/2 "2025-02-23T12:07:50Z")

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Everything is OK, end up with lowering Voltage based on BMS from battery. Victron documentation was ok

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**Author:** ![system](https://europe1.discourse-cdn.com/victron/original/1X/21a9a7b5db7c6339715f993568736a7053199995.png) [@system](https://community.victronenergy.com/u/system)\
**Post date:** [9 March 2025 12:08 UTC](https://community.victronenergy.com/t/multi-ii-3000-48-gx-with-cfe5100-on-cable-a/22943/3 "2025-03-09T12:08:07Z")

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Closed on 9 March 2025 12:08 UTC

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