On SOC, the generator starts at 30% and stops at 72% SOC.
On Battery Voltage, the generator starts at 48V and stops at 52.5V.
The problem is as follows:
The generator correctly starts at the first condition met (30% SOC) but „sometimes” it stops after a while BEFORE reaching its peak: - see the small tip marked with a thinck red line below:
Even if the generator stops (the motor is stopped) and the batteries start again to discharge, the Cerbo GX console shows that „the generator is running”:
I think (from graphs) that this phenomenon has to do with the Solar Panels which are starting to charge the batteries but in these days the current from Solar is much less than our consumptions (because these days there is not enough light).
What should we do in order to avoid total dischaging of batteries?
We are in danger to remain without current?
(Note: in the above SOC graph I finally started the generator manually)
A few thoughts.
Run the relay state and see if the system is actually sending the off.
Check if the off happens with the voltage off condition.
I think what could be happening is the voltage is rising faster than the soc.
You may have a conflict with the soc and battery voltage there and will have to choose one condition or the other
As an FYI 72% SOC is much lower voltage that 52.5v
There is definitely a conflict in your conditions set.
Thanks for your quick response! Yes, the generator actually shuts down - but it shuts down way too soon. Besides that, since Cerbo thinks that it is still running it doesn’t start it again when the start condition is met again due of battery discharging.
I understand this.
What needs to be worked out is if the system is telling it to shut down or if it is shutting down for another reason unrelated to the GX.
So check the relay state in vrm advanced to see if it is opened or closed.
As we can see in the graph below which depicts a close zoom on both SOC and Relay 1 State, - the Relay 1 begun to be „Closed” when the generator starts AND remains so when the generator stops few minutes after:
Also I see in the screenshot above „Ext. control”. I understand that this appeared because I started the generator manually from turnkey. But how can be removed?
Indeed it seems from the shape of SOC graph that there is something (Pylontech BMS?) controlling the shape - see the graph below especially at the timestamps marked with red:
…even if the start conditions (low SOC, low voltage) aren’t honored? …and even if the Cerbo GX is saying that generator is „working” when he is stopped in reality?
Should I trust that „sometimes” at „some moment” Pylontech’s BMS will kick in and start the generator?
I can leave it to see what is happening but I am afraid of some damage, besides the power loss.
