SolarFlow 2400 AC stuck in "Standby" – No grid charging, no discharge

MarkusDerKaiser

Hi everyone,

Following up on my previous post about the re-pairing bug. After receiving a replacement unit, I'm still experiencing a persistent issue and wanted to document it in case others are in the same situation.

Current behaviour:
The unit stays permanently in "Standby / Waiting" mode
No grid charging - the app shows 0W input from grid, despite the outlet being powered (the app itself warns: "The off-grid outlet is not turned on").
No discharge - the batteries are at 58% (2× AB3000X) but the unit delivers 0W to the home circuit
The power LED blinks green continuously

What I've already tried:
Toggling hers on and off multiple times.
•Setting manual charge schedules → the unit ignores them completely
•Reconnecting the device in the app
Checking all physical connections

System context:
SolarFlow 2400 AC (replacement unit)
2× AB3000X batteries
Smart Meter 3CT (Smart Meter mode enabled)
Country set to Germany.
We're active.

Has anyone managed to get out of this loop?
Could this be a firmware issue or a server-side HEMS configuration problem?
Does anyone know how to get the batteries out of standby mode?

Any help appreciated.
Thanks

Tim (Moderator)

Hallo. Irgendwas stim.t ja mit den Anschlüssen deines 3ct nicht. Du produzierst 45 Watt, dein Haus verbraucht 840 Watt, aber nur 834 Watt werden aus dem Netz gezogen. Das kann ja irgendwie nicht passen. 😅
Wie ist denn dein 3ct angeschlossen?
Gruß, Tim.

MarkusDerKaiser

Hello Tim.
Thank you for your response.

I have a single-phase installation, so the network cable is connected to L3, while L2 and L1 are bridged (I think this is the right way to install it in single-phase installations).
The clamp is connected in L3 120A.

Is there anything wrong with installing the 3ct?
Thank you!

Tim (Moderator)

MarkusDerKaiser Okay. Hast du die 120A Strommesszangen auch an den 120A Anschlüssen?
Wie misst du denn deine PV Leistung? Hierfür benötigst du die 50A Strommesszangen und diese müssen auch in die 50A Anschlüsse.
Wahrscheinlich liegt dort dein Fehler, wenn du den 3ct nicht so angeschlossen hast. 🤷
Gruß, Tim.

MarkusDerKaiser

The ammeter clamp that measures house consumption is connected to IL3 120A
The other ammeter tweezers I'm not using.

Photovoltaic production is being measured by SolarFlow 800 itself.

Tim (Moderator)

MarkusDerKaiser Okay. Also ist in deinem System noch ein SF800 integriert. Diese Info hast du aj nirgendwo gegeben. 😩
Wie ist denn der SF800 angeschlossen?
Hast du im Modus für intelligente Stromzähler das AC-Laden aktiviert und die Überschussverfolgung ausgewählt?
Nimm sonst den SF800 aus HEMS raus. Lass ihn maximal 800 Watt einspeisen und den Überschuss durch den SF2400AC speichern.

MarkusDerKaiser

Sorry, I didn't think the problem was with the solarflow 800, so I didn't mention it.

I have removed the bridge from the 3 phases of the 3ct (since the last update it seems that the bridge is not necessary).

And I've set up the rest as you told me. The option to start AC loading is enabled, but a message appears below; "no network feedback"
I think the problem is here.

Tim (Moderator)

MarkusDerKaiser Dann den SF2400AC löschen und neu hinzufügen. Klingt danach, dass er keine Verbindung zum Internet hat bzw dein WLAN nicht findet. 🤔

MarkusDerKaiser

It can't be a Wi-Fi error, as the SolarFlow 800 is in the same location.

Tim (Moderator)

MarkusDerKaiser Und ich denke dass genau dort der Fehler liegt. Du sagst doch, dass dein Gerät grün blinkt. Dann würde ich es erneut in deinem Netzwerk anmelden. 🤷

MarkusDerKaiser

The error that appears exactly is: "No Energy Feedback to Grid"

Tim (Moderator)

MarkusDerKaiser Das ist kein Fehler, sondern nur der Hinweis, dass zu diesem Zeitpunkt kein anderes Gerät Energie an dein eigenes Stromnetz sendet, die durch deinen SF2400AC aufgenommen werden könnte.
Das ist also alles richtig.

MarkusDerKaiser

Thank you for your help Tim, but if everything is correct I don't understand why it doesn't supply power (58% batteries) and I don't understand why it's still in standby mode : (

Tim (Moderator)

MarkusDerKaiser Noch mal mein Rat: Löschen und dann neu verbinden.

MarkusDerKaiser

Hello.

I tried every option that could be tried;
•I have reviewed the installation of the 3ct. •I've created a 2.4GH exclusive Wi-Fi network for zendure devices, making sure the connection reaches everyone.
•I have reconfigured all the devices from scratch, disassembling them and relinking them.
•I tested the 2400ac off-grid to-a-off grid, and despite having it active in the app, the hair dryer I connected didn't work at any time.

It's desperate, it's the second 24000ac unit that passes through my hands, and I know that the after-sales experience is not quick at all. I regret having trusted Zendure.

If anyone else has this problem and has managed to fix it, please tell me.