Hi all, I have a Multi_RS and a Fronius coupled on AC. I also have a GX (Rpi) that controls the MultiRS and talks to Fronius over Modbu/TCP. Battery also connected into the Rpi over serial. Configuration is working relatively good and I wanted to know if the frequency shifting is really necessary. …

Usually when you are not conected to grid near the top of the battery charge it does this. I have a node red flow that uses the power limit of the fronius to try minimise the frequency shift. So natively -no- frequency shift is inbuilt cant be overridden.

OK, Thank you for the clarification. I’m most of the time off-grid and the batteries are full (a lot of sun in the summer:) The reason I’ve asked about this is because the system tends to oscillate when the batteries are full and there’s not enough load. The batteries get charged and discharged a…

It sort of has to be to prevent overshoot and battery damage. The oscilation is irritating. That was how my explorations into a node red experiment began. I think there aresome settings in the fronius that can be adjusted, but in some cases using its own meter can be easier.

I have a smart meter that’s compatible with the Fronius. You’re saying that if I install it on the output of the Victron and limit the production in the Fronius based on the house consumption, it might work? I might try that sometime if it makes sense. Also, another thing is that I’m using the “db…

Batteries usually use two methods for control. Cvl and ccl. [image] Mihai: install it on the output of the Victron and limit the production in the Fronius based on the house consumption, it might work If you create tour own control for that then it will. I was thinking the fronius meter, s…

Fronius controll, other than frequency shifting

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10

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expert , offgrid , pv_inverter , multiplus-ii , fronius , cerbo_gx

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1112

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1

93

9 March 2026

Frequency change of Multiplus2 output affects appliance

Q&A and troubleshooting

ess , domestic , multiplus-ii , fronius , cerbo_gx

8

359

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MP II Inselanlage - Regelgeschwindigkeit Frequenz für Fronius anpassen?

Deutschsprachiger Bereich

offgrid , pv_inverter , fronius

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229

19 November 2024

Fronius controll, other than frequency shifting

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