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rafka avatar image
rafka asked

Multiplus starts charging from grid when SoC limit is reached

Hi,

lately I discovered a strange behaviour of my Multiplus. When the battery reaches the SoC limit at night, it will start to charge the batteries with around 120W from grid. It will not stop to do so even if the SoC is above the limit.

My install:

3x Multiplus II 48/3000 running Firmware 481

1x Cerbo Gx running v2.80~16-large-21

8x Pylontech US2000C

2x Fronius Galvo


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How can I prevent this behaviour?


Multiplus-IIESSPylontech
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shaneyake avatar image shaneyake commented ·
Do you have any DC loads?


Looks to me like 80-100W when charging correct?

Can you post screenshots from VRM? Does it turn on and off, or does it just charge the whole time? What batteries do you have?

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rafka avatar image rafka shaneyake commented ·
Yeah it's about 100W when charging. It keeps charging until the ESS#1 status is cleared, which could last the whole night. I have 8x Pylontech US2000C batteries.
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3 Answers
rafka avatar image
rafka answered ·

I found the solution. There was a bug in my controller for my electric heater, which enabled the Inverter if my heater wasn't switched on. But it also enabled the Inverter if the SOC reached min and the system tried to compensate with charging from grid.

Thank you for your efforts.

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jailbraik avatar image
jailbraik answered ·

Haben Sie eine Lösung gefunden ?

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rafka avatar image rafka commented ·

Nein habe bisher noch keine Lösung gefunden. Das System lädt die Batterien weiterhin mit Netzstrom. Eigentlich hätte ich erwartet, dass das ganze System in Passthru wechselt wenn der min SOC erreicht wird und kein Solarstrom vorhanden ist.

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Matthias Lange - DE avatar image
Matthias Lange - DE answered ·

#1 ist ja das Signal "Batterie leer" um die Batterie vor Tiefentladung zu schützen wird eine kleine Ladung aus dem Netz vorgenommen, das Verhalten ist völlig normal.
Ich glaube das hängt mit dem "BatteryLife" Modus zusammen

#1 means the battery is empty, to protect the battery from being discharged to deep a small charging from the grid is started, that behavior is totally normal.
I think it is related to the "BatteryLife" mode.

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rafka avatar image rafka commented ·

Nur ist BatteryLife nicht aktiviert. Und soweit ich es verstanden habe fängt er erst 5% unter dem min SOC an die Batterie aus dem Netz zu laden.

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Matthias Lange - DE avatar image Matthias Lange - DE ♦ rafka commented ·

Das mit BatteryLife war nur eine Vermutung.

Bitte mal ein paar Bilder der Einstellungen machen (GX Gerät und VE.config).

Normalerweise sollte beim erreichen des eingestellten SOC noch nicht #1 ausgelöst werden und wenn der eingestellte SOC um 5% unterschritten wird, wird aus dem Netz geladen.

Bei #1 wird aber immer etwas aus dem Netz geladen.

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