# AC-coupling Enphase Modbus TCP

**URL:** <https://community.victronenergy.com/t/ac-coupling-enphase-modbus-tcp/27875>\
**Category:** DIY\
**Tags:** enphase, multiplus-ii, diy\
**Created:** [6 April 2025 06:02 UTC](https://community.victronenergy.com/t/ac-coupling-enphase-modbus-tcp/27875 "2025-04-06T06:02:59Z")\
**Posts on this page:** 6\
**Page:** 2

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**Author:** ![ron\_h](https://avatars.discourse-cdn.com/v4/letter/r/ed8c4c/32.png) [@ron\_h](https://community.victronenergy.com/u/ron_h)\
**Post date:** [5 June 2025 13:17 UTC](https://community.victronenergy.com/t/ac-coupling-enphase-modbus-tcp/27875/21 "2025-06-05T13:17:09Z")

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You do see your enphase PV system in venus OS?  
Why can’t you connect to your Multiplus?

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**Author:** ![Mamas51](https://dub1.discourse-cdn.com/victron/user_avatar/community.victronenergy.com/mamas51/32/26072_2.png) [@Mamas51](https://community.victronenergy.com/u/Mamas51)\
**Post date:** [5 June 2025 17:05 UTC](https://community.victronenergy.com/t/ac-coupling-enphase-modbus-tcp/27875/22 "2025-06-05T17:05:06Z")

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@ron_h  
I can connect to the Multiplus, but the connection between the Multiplus and the Enphase doesn’t work.  
I’ve never used Venus OS.  
Do you have a procedure to check this?

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**Author:** ![ron\_h](https://avatars.discourse-cdn.com/v4/letter/r/ed8c4c/32.png) [@ron\_h](https://community.victronenergy.com/u/ron_h)\
**Post date:** [5 June 2025 17:27 UTC](https://community.victronenergy.com/t/ac-coupling-enphase-modbus-tcp/27875/23 "2025-06-05T17:27:33Z")

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So you do control the Multiplus by 3th party home management?

I’m afraid I can’t help you.  
You have to look how to add SunSpec Modbus PV inverters in your home management.

In Victron Venus after search of new modbus PV systems, it was directly recognized.

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**Author:** ![Harmen](https://avatars.discourse-cdn.com/v4/letter/h/2acd7d/32.png) [@Harmen](https://community.victronenergy.com/u/Harmen)\
**Post date:** [3 July 2025 07:55 UTC](https://community.victronenergy.com/t/ac-coupling-enphase-modbus-tcp/27875/24 "2025-07-03T07:55:55Z")

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It takes a while, at the end Enphase Support installed Modbus TCP on my system. In the Cerbo in the PV Inverters tab, I scanned for the Enphase gateway. All working fine, the Enphase PV pops up in VRM.

This is for me the first step to connect my Enphase system to AC-out 1 on the Multiplus II 5000. Mayby I overlooked, is there documentation available how to? Like these guidelines: “AC-coupled PV with Fronius PV Inverters”?

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**Author:** ![ron\_h](https://avatars.discourse-cdn.com/v4/letter/r/ed8c4c/32.png) [@ron\_h](https://community.victronenergy.com/u/ron_h)\
**Post date:** [23 July 2025 20:49 UTC](https://community.victronenergy.com/t/ac-coupling-enphase-modbus-tcp/27875/25 "2025-07-23T20:49:52Z")

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1.0 rule and frequency shifting is important when you are off grid.

> **[AC-coupling and the Factor 1.0 rule \[Victron Energy\]](https://www.victronenergy.com/live/ac_coupling:start)**

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**Author:** ![smith](https://avatars.discourse-cdn.com/v4/letter/s/f04885/32.png) [@smith](https://community.victronenergy.com/u/smith)\
**Post date:** [31 March 2026 22:18 UTC](https://community.victronenergy.com/t/ac-coupling-enphase-modbus-tcp/27875/26 "2026-03-31T22:18:58Z")

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After raising several tickets with enphase support we received this response “Hello, unfortunately, Modbus is not compatible in Australia”. No further explanation.

May help others…. save time or money

Modbus working fine with everything else here!

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