I have a Fronius on the AC output side of my Multiplus. I have noticed that when large loads on the grid side of my Multiplus are switched off, the Fronius output is cut back even when the battery is not full. It seems like ESS prefers to cut back the AC coupled PV rather than decreasing the inverting/increasing the charging of the Multiplus. After some time, the Fronius output is slowly ramped up again and everything stabilises.
Is there a reason why ESS works in this way? The problem is that if there are large intermittent loads (eg oven, microwave) quite a lot of PV harvesting is lost as the Fronius is repeatedly cut back and then has to slowly ramp up again, when none of it would be lost if the Multiplus was adjusted instead.
