# Multiplus II not charging

**URL:** <https://community.victronenergy.com/t/multiplus-ii-not-charging/39571>\
**Category:** DIY\
**Tags:** battery\_charging, beginner, cerbo\_gx, generator, multiplus-ii\
**Created:** [15 July 2025 18:24 UTC](https://community.victronenergy.com/t/multiplus-ii-not-charging/39571 "2025-07-15T18:24:15Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![RobertL](https://avatars.discourse-cdn.com/v4/letter/r/a87d85/32.png) [@RobertL](https://community.victronenergy.com/u/RobertL)\
**Post date:** [15 July 2025 18:24 UTC](https://community.victronenergy.com/t/multiplus-ii-not-charging/39571/1 "2025-07-15T18:24:15Z")

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Hi folks, my Multiplus II 24/3000/70 is not charging when I try to charge with a generator. I would be very happy to get a hint on what I am doing wrong here. The inverter is working.

A video of the behavior when I switch from _charger/inverter_ to _charger only_ to force it to start can be seen here:

[![](https://europe1.discourse-cdn.com/victron/original/3X/3/1/31606a26017dd7348898e5a7b3540c846b8cae54.jpeg "Multiplus II not charging") ](https://www.youtube.com/watch?v=eUDUcCD9yxw)

That is what the Cerbo GX is showing, while the generator is running:

 ![CerboGX_ACInput](https://europe1.discourse-cdn.com/victron/original/3X/2/5/250f232975a6b9378a991536a3191e7c3d8e87cd.jpeg)

Here is my config:

 ![01_VE.Config_General](https://europe1.discourse-cdn.com/victron/original/3X/0/8/08c69982f673f1426d6bc4e69badf0d52f62a998.png)  
 ![03_VE.Config_Charger](https://europe1.discourse-cdn.com/victron/original/3X/f/c/fc983dfb33ff3b71a98fadd94183cf2878b9e480.png)

Here you can see the overall setup:

 ![Setup](https://europe1.discourse-cdn.com/victron/original/3X/2/c/2cf295864d4daebc446f4106a6a60237eb509b8f.jpeg)

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<div class="post-metadata">

**Author:** ![RobertL](https://avatars.discourse-cdn.com/v4/letter/r/a87d85/32.png) [@RobertL](https://community.victronenergy.com/u/RobertL)\
**Post date:** [16 July 2025 08:02 UTC](https://community.victronenergy.com/t/multiplus-ii-not-charging/39571/2 "2025-07-16T08:02:31Z")

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And the solution was to add a load to the generator to prevent it from dropping voltage or frequency. I could even revert to default all the settings like _Dynamic current limiter_, _UPS function_ and _Weak AC Input_ and it was still starting/running.

The forums’s recommendation system did it’s magic in the end.

So first I got this thread:

> [@Problem charging with multiplus & generator off grid system](https://community.victronenergy.com/t/problem-charging-with-multiplus-generator-off-grid-system/13299/2):
>

Which led me to the very helpful _Multiplus Generator FAQ_

> **[MultiPlus Generator FAQ \[Victron Energy\]](https://www.victronenergy.com/live/multiplus_faq)**

Which states:

> Some generators will alter their voltage or frequency when loads change. This can be significant if the generator goes from no-load to full-load quickly. It can help to have a small ‘stabilising’ resistive load such as a 75W light globe smooth out this start up voltage/frequency variation.

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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:** [30 July 2025 08:02 UTC](https://community.victronenergy.com/t/multiplus-ii-not-charging/39571/3 "2025-07-30T08:02:50Z")

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Closed on 30 July 2025 08:02 UTC

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