I have now since 2 days ESS running on my Victron; goal is to keep my net grid power around 0 (or in the settings Grid-setpoint = 50W).
But I noticed a behaviour I was not expecting, so I’m curious if this normal.
My system is the following:
My Victron Multiplus-II-GX is connected via AC-in to Phase 1 on my house.
I have a battery which has its own BMS. This BMS is not connected to the Victron.
On phase 2 and Phase 3 in my house I have each a different PV system.
I have a grid-monitor system that measures every 30 seconds the total power (phase 1 + 2 + 3); which is send (and received) by the Multiplus.
As soon as the sun starts shining (like this morning), the energy measured is negative and the battery is set to charging by the Victron, and indeed the battery gets charged.
And when the sun stops shining the battery discharges and deliveres to AC_in.
So far the good part.
Now my observation:
The victron charges and discharges in “discrete steps” of maximal power (set to 2000W). So I see a pulse-train of +2000W at the output (3 minutes on=2000W, 3 minutes off=0W) when the sun is shining. And a -2000W pulse when the sun is not shining.
Is the ESS by default a PWM-like signal or should the amplitude also be changing?
(or did I mess up somewhere in the setttings)
