I do have a 3-phase Grid Parallel Setup in ESS Mode. The regulation behaviour is rather poor: It takes 10-20s until the Setup starts to react on a sudden power change (e.g. oven turning on), and regulation takes quite some time until a stable state is achieved. Please see the charts as recorded from the Venus-OS MQTT Server - so those are the data that Venus has available for regulation. A slow energy meter should not be the cause for problems.
Do you have any idea on how to improve the behavior of the system?
Grid Meter is a custom python script that provides values using vedbus (it’s based on the “moderne messeinrichtung” grid meter in germany, using the optical interface).
Please note that the charts shown above are based on values received from Venus OS via MQTT - so at least the grid meter update interval should not be a problem. The Multiplus only starts compensating the load ~15s after VenusOS knows about the changed load.
I can only suspect the mod is playing a part, under normal conditions, either with internal or supported external metering, it should be faster than that.
No.
It won’t be that, it will be responding to what it sees through it’s own sensors, or what it is told by external devices, or custom control code.
There have been some strange behaviours from custom dev, something that is impossible for us to try diagnose remotely, without troubleshooting by trying to eliminate possible causes.
If you had loads on AC OUT, you could compare the ramp times to the parallel loads which will help narrow it down.
I’m running a simliar setup, getting the values from an austrian Smart Meter via amsreader, massaging it into MQTT and using dbus-mqtt-grid; The meter updates only every 5 seconds, so I also see some oscillations on load changes that eventually die down, and most importantly, that don’t show up in my grid meter’s readings – I have set a grid setpoint of -10W and every hour, my meter registers 0.01-0.02kWh, so I really don’t care too much.
But my loads are all on AC-Out, so that may be a factor.
Your meter can’t be a factor in ramp times as your loads aren’t regulated by it, it is only providing a reference to maintain the setpoint, while actual loads are metered by the inverter.
