# MultiPlus-II 48/5000 + Enphase IQ7: Frequency shifting, ESS and zero feed-in to the grid

**URL:** <https://community.victronenergy.com/t/multiplus-ii-48-5000-enphase-iq7-frequency-shifting-ess-et-zero-injection-reseau/64524>\
**Category:** DIY\
**Tags:** enphase, feed-in\_limit, beginner, multiplus-ii, french\
**Created:** [29 October 2026 11:29 UTC](https://community.victronenergy.com/t/multiplus-ii-48-5000-enphase-iq7-frequency-shifting-ess-et-zero-injection-reseau/64524 "2026-10-29T11:29:49Z")\
**Posts on this page:** 1\
**Showing post:** 16

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**Author:** ![Q.x](https://dub1.discourse-cdn.com/victron/user_avatar/community.victronenergy.com/q.x/32/737_2.png) [@Q.x](https://community.victronenergy.com/u/Q.x)\
**Post date:** [31 October 2026 18:24 UTC](https://community.victronenergy.com/t/multiplus-ii-48-5000-enphase-iq7-frequency-shifting-ess-et-zero-injection-reseau/64524/16 "2026-10-31T18:24:09Z")

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> [@nicdu40](#):
>
> Regarding Enphase power limitation, I’ve read your documentation carefully, but unfortunately my tests haven’t been conclusive.

Did you request activation of the feature?  
Did you provide the IP address of your GX (Venus OS on Raspberry Pi)?

We all struggled in May and June following the change to the Modbus TCP server on the Enphase gateway ([more info](https://community.victronenergy.com/t/enphase-modbus-system-not-showed-in-vrm/58535)). This may be related. I myself had a “Slave Device Busy” response, which was resolved by restarting the gateway.

> [@Enphase modbus system not showed in VRM](https://community.victronenergy.com/t/enphase-modbus-system-not-showed-in-vrm/58535/168?u=q.x):
>
> On August 6, with system version 8.3.5528, I encountered a similar problem. The Modbus service was returning error 6, “Slave Device Busy.” After a restart, the service became operational again.

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