Today I launched my installation:
Three MultiPlus II 48/8000 inverters configured in a 3-phase setup.
I also have two MPPT BlueSolar 250/100 VE.Can chargers connected to the Cerbo GX II via the VE.Can bus, and two SEPLOS batteries (14.2 kWh total).
Unfortunately, I cannot export power to the grid due to connection limitations.
After turning on the system, I noticed that **even with fully charged batteries, the system started exporting energy to the grid.
At first, the exported values were small (5–30 W), but sometimes — when there was no local load — the chargers inexplicably raised the voltage from FLOAT (54 V) to 57 V, and in that moment the system exported up to 500W to the grid.
You’re absolutely right, because in fact the whole system is balanced and doesn’t feed into the grid — I only see negative values on two phases. Unfortunately, I don’t have a meter yet, but I’ve already ordered one and will install it as soon as it arrives. We’ll see if that improves anything. I used to use a Growatt system before, and it didn’t show such values — though they might have occurred as well — that’s why I got concerned.
Unfortunately, I don’t have any meter at the moment, but I’ve already ordered the ET340. As soon as I receive it, I’ll install it and let you know if it improves the situation.
Is the reading shown in the attached image normal? Two phases are showing negative values and one is positive. Overall, the total is positive, but this reading seems strange to me. Is this normal?
Thank you I see you have -50W is this mean you send to grid always minimum 50W ?
You have older version of cerbo? Sorry for my answer I starting explore this system and I try to understand all setting’s. In my system this can’t happen because we have a rented connection. Today when battery ending charge something going wrong and send on all phase 1000W I scare little and shut down the grid fuse. I give you information how work this meter which I buy ET340 …
but I must have import to grid to 0 I can’t send any power to grid
