# Multigrid ESS and 3 AC coupled Inverters - all same phase and ACin?

**URL:** <https://community.victronenergy.com/t/multigrid-ess-and-3-ac-coupled-inverters-all-same-phase-and-acin/18310>\
**Category:** Q&A and troubleshooting\
**Tags:** beginner, multiplus, ess\
**Created:** [11 January 2025 14:09 UTC](https://community.victronenergy.com/t/multigrid-ess-and-3-ac-coupled-inverters-all-same-phase-and-acin/18310 "2025-01-11T14:09:40Z")\
**Posts on this page:** 1\
**Showing post:** 7

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**Author:** ![vicky](https://avatars.discourse-cdn.com/v4/letter/v/b19c9b/32.png) [@vicky](https://community.victronenergy.com/u/vicky)\
**Post date:** [12 January 2025 12:02 UTC](https://community.victronenergy.com/t/multigrid-ess-and-3-ac-coupled-inverters-all-same-phase-and-acin/18310/7 "2025-01-12T12:02:08Z")

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Txs Trevor. I did watch the video 8.1 (which I had in the past already) but it doesn’t answer my specific question unfortunately. It is still unclear to me if I have to connect all PV AC inverters _to the same phase_ or not, if I run a single phase system. Or do I have to configure a three phase system, using one multi only? I am not talking about wether using ACin or ACout, that difference is clear to me and I might consider moving one PV AC inverter to ACout (Option2) , but still - the question remains. Same phase or not ?  
Maybe I missed the point so far, so please let me know.

 ![Schema_2025-2](https://europe1.discourse-cdn.com/victron/original/2X/2/27c0a80c764c96f997d5e9e65f167b22d6986627.jpeg)

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