# Multi-Plus 12/3000/120 suddenly says it is a 48/3000/30-50 **URL:** \ **Category:** DIY\ **Tags:** 3-phase, marine, beginner, cerbo\_gx, multiplus\ **Created:** [2 September 2025 15:58 UTC](https://community.victronenergy.com/t/multi-plus-12-3000-120-suddenly-says-it-is-a-48-3000-30-50/44740 "2025-09-02T15:58:31Z")\ **Posts on this page:** 15\ **Page:** 1
**Author:** ![dwpsco](https://avatars.discourse-cdn.com/v4/letter/d/4bbf92/32.png) [@dwpsco](https://community.victronenergy.com/u/dwpsco)\ **Post date:** [2 September 2025 15:58 UTC](https://community.victronenergy.com/t/multi-plus-12-3000-120-suddenly-says-it-is-a-48-3000-30-50/44740/1 "2025-09-02T15:58:31Z")
I have two Multi-Plus 12/3000/120 setup for 240 US mode. Been working fine for 2 years. This morning all of a sudden I lost AC, Muti-Plus said low battery (they were not they were at 62%) rebooted the Muti-Plus, same thing, rebooted everything and now the Cerbo says my Muti-Plus is a 48/3000/30-50 and that the batteries are at 100% (they are not) and I’m feeding 3 phase AC to the grid (it is not). What just happened?? ---
**Author:** ![dwpsco](https://avatars.discourse-cdn.com/v4/letter/d/4bbf92/32.png) [@dwpsco](https://community.victronenergy.com/u/dwpsco)\ **Post date:** [2 September 2025 16:10 UTC](https://community.victronenergy.com/t/multi-plus-12-3000-120-suddenly-says-it-is-a-48-3000-30-50/44740/2 "2025-09-02T16:10:57Z")
![1056](https://europe1.discourse-cdn.com/victron/original/3X/0/5/054d54fa2dde59504eddffb61ac9b36dc70f6e29.jpeg) ![1057](https://europe1.discourse-cdn.com/victron/original/3X/a/4/a4dc3d943b2b6e5657b3fbae96f9bb09061b21fc.jpeg) ![1055](https://europe1.discourse-cdn.com/victron/original/3X/6/e/6e2d29adf9213cc1dd997e48b17b82a0a77081a1.jpeg) ---
**Author:** ![dwpsco](https://avatars.discourse-cdn.com/v4/letter/d/4bbf92/32.png) [@dwpsco](https://community.victronenergy.com/u/dwpsco)\ **Post date:** [2 September 2025 16:12 UTC](https://community.victronenergy.com/t/multi-plus-12-3000-120-suddenly-says-it-is-a-48-3000-30-50/44740/3 "2025-09-02T16:12:24Z")
Another Note; The BMS is recording the correct Battery level when I log into it via the Bluetooth ---
**Author:** ![dwpsco](https://avatars.discourse-cdn.com/v4/letter/d/4bbf92/32.png) [@dwpsco](https://community.victronenergy.com/u/dwpsco)\ **Post date:** [2 September 2025 16:18 UTC](https://community.victronenergy.com/t/multi-plus-12-3000-120-suddenly-says-it-is-a-48-3000-30-50/44740/4 "2025-09-02T16:18:12Z")
And another note: I have a Lynx Smart BMS. The Cerbo is saying it is a BMV-702… Has my cerbo gone bad? ---
**Author:** ![Ersus](https://avatars.discourse-cdn.com/v4/letter/e/839c29/32.png) [@Ersus](https://community.victronenergy.com/u/Ersus)\ **Post date:** [2 September 2025 16:52 UTC](https://community.victronenergy.com/t/multi-plus-12-3000-120-suddenly-says-it-is-a-48-3000-30-50/44740/5 "2025-09-02T16:52:48Z")
What about firstly try to reboot every system component ---
**Author:** ![dwpsco](https://avatars.discourse-cdn.com/v4/letter/d/4bbf92/32.png) [@dwpsco](https://community.victronenergy.com/u/dwpsco)\ **Post date:** [4 September 2025 18:54 UTC](https://community.victronenergy.com/t/multi-plus-12-3000-120-suddenly-says-it-is-a-48-3000-30-50/44740/6 "2025-09-04T18:54:38Z")
I tried that, cerbox is still reporting garbage ---
**Author:** ![Ersus](https://avatars.discourse-cdn.com/v4/letter/e/839c29/32.png) [@Ersus](https://community.victronenergy.com/u/Ersus)\ **Post date:** [4 September 2025 19:06 UTC](https://community.victronenergy.com/t/multi-plus-12-3000-120-suddenly-says-it-is-a-48-3000-30-50/44740/7 "2025-09-04T19:06:41Z")
is it possible to update to the latest 3.65? ---
**Author:** ![dwpsco](https://avatars.discourse-cdn.com/v4/letter/d/4bbf92/32.png) [@dwpsco](https://community.victronenergy.com/u/dwpsco)\ **Post date:** [4 September 2025 20:20 UTC](https://community.victronenergy.com/t/multi-plus-12-3000-120-suddenly-says-it-is-a-48-3000-30-50/44740/8 "2025-09-04T20:20:25Z")
![Screenshot 2025-09-04 131839](https://europe1.discourse-cdn.com/victron/original/3X/2/d/2de84fe969711df8c1b878adf4c3b19018f0d88f.png) Already on 3.65 ---
**Author:** ![Ersus](https://avatars.discourse-cdn.com/v4/letter/e/839c29/32.png) [@Ersus](https://community.victronenergy.com/u/Ersus)\ **Post date:** [4 September 2025 20:55 UTC](https://community.victronenergy.com/t/multi-plus-12-3000-120-suddenly-says-it-is-a-48-3000-30-50/44740/9 "2025-09-04T20:55:02Z")
And tested downgrading to earlier fw? ---
**Author:** ![dwpsco](https://avatars.discourse-cdn.com/v4/letter/d/4bbf92/32.png) [@dwpsco](https://community.victronenergy.com/u/dwpsco)\ **Post date:** [4 September 2025 21:07 UTC](https://community.victronenergy.com/t/multi-plus-12-3000-120-suddenly-says-it-is-a-48-3000-30-50/44740/10 "2025-09-04T21:07:09Z")
Was working for quite awhile on that firmware ---
**Author:** ![Ersus](https://avatars.discourse-cdn.com/v4/letter/e/839c29/32.png) [@Ersus](https://community.victronenergy.com/u/Ersus)\ **Post date:** [4 September 2025 21:22 UTC](https://community.victronenergy.com/t/multi-plus-12-3000-120-suddenly-says-it-is-a-48-3000-30-50/44740/11 "2025-09-04T21:22:06Z")
Well, i can’t say what the problem is. Strange that it suddenly changes its ID… Maybe you have a spare Cerbo to test? Or try a factory reset and check if there is an Firmware update for the Multiplus? ---
**Author:** ![BartChampagne](https://avatars.discourse-cdn.com/v4/letter/b/a6a055/32.png) [@BartChampagne](https://community.victronenergy.com/u/BartChampagne)\ **Post date:** [5 September 2025 00:00 UTC](https://community.victronenergy.com/t/multi-plus-12-3000-120-suddenly-says-it-is-a-48-3000-30-50/44740/12 "2025-09-05T00:00:36Z")
What happens if you shut everything down for a minute (disconnect all AC and DC sources) and then power everything up again ? I hope you’re looking at the right GX device because 56.95V on a 12V system would be kind of bad. Maybe start with disconnecting MPPT devices. ---
**Author:** ![Ersus](https://avatars.discourse-cdn.com/v4/letter/e/839c29/32.png) [@Ersus](https://community.victronenergy.com/u/Ersus)\ **Post date:** [5 September 2025 06:46 UTC](https://community.victronenergy.com/t/multi-plus-12-3000-120-suddenly-says-it-is-a-48-3000-30-50/44740/13 "2025-09-05T06:46:40Z")
> [@BartChampagne](#): > > I hope you’re looking at the right GX device because 56.95V on a 12V system would be kind of bad. Very sharp! Didn’t looked at that… ---
**Author:** ![dwpsco](https://avatars.discourse-cdn.com/v4/letter/d/4bbf92/32.png) [@dwpsco](https://community.victronenergy.com/u/dwpsco)\ **Post date:** [5 September 2025 10:57 UTC](https://community.victronenergy.com/t/multi-plus-12-3000-120-suddenly-says-it-is-a-48-3000-30-50/44740/14 "2025-09-05T10:57:17Z")
Okay, for reasons unknown, the cerbo had switched into ees demo mode. I turned off demo mode and it’s fine now. ---
**Author:** ![Ersus](https://avatars.discourse-cdn.com/v4/letter/e/839c29/32.png) [@Ersus](https://community.victronenergy.com/u/Ersus)\ **Post date:** [5 September 2025 15:52 UTC](https://community.victronenergy.com/t/multi-plus-12-3000-120-suddenly-says-it-is-a-48-3000-30-50/44740/15 "2025-09-05T15:52:11Z")
Well, good that it is cleared now. And great for letting it know.