# Quattro 48/8000/110-2x100 Backfeeds to Grid

**URL:** <https://community.victronenergy.com/t/quattro-48-8000-110-2x100-backfeeds-to-grid/19638>\
**Category:** Q&A and troubleshooting\
**Tags:** three-phase, cerbo\_gx, vrm\
**Created:** [23 January 2025 06:08 UTC](https://community.victronenergy.com/t/quattro-48-8000-110-2x100-backfeeds-to-grid/19638 "2025-01-23T06:08:39Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Shedrack](https://avatars.discourse-cdn.com/v4/letter/s/91b2a8/32.png) [@Shedrack](https://community.victronenergy.com/u/Shedrack)\
**Post date:** [23 January 2025 06:08 UTC](https://community.victronenergy.com/t/quattro-48-8000-110-2x100-backfeeds-to-grid/19638/1 "2025-01-23T06:08:39Z")

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My Quattro 48/8000/110-2x100 backfeeds to the Grid regardless of having no assistants. The inverter is installed with a xxxx160 firmware version when the latest is XXXX209 as per the VRM remote firmware updates. However, the firmware updates keeps failing each time I am trying to update.

The configuration is three inverters configured as a three phase buck-up system.

Any idea why the backfeeding is happening and refuses to update to the latest firmware?

 ![image](https://europe1.discourse-cdn.com/victron/original/2X/7/795b1cc5104444d10ee53975e049db739bce8358.png)

 ![image](https://europe1.discourse-cdn.com/victron/original/2X/3/3106fea4380e3efefd3a0396932d497794322bf9.png)