a question is bugging me:
assume the following setup:
MP2 5000 in ESS setting with Fronius Primo 4.6 (with 4.4kwp) on AC1
Fronius is set to MG50
What happens when the Grid fails ? --> Multi is taking over and is regualting the Primo via Frequency.
So Far so good.
But when the battery is nearly full or full, and the grid is comming back online ?
I think the multi needs to synchronise back to the grid. It goes back to 50 Hz. But what will the primo do ? When the primo output power goes up and the battery is full and the grid is not yet connected via the ess relays ?
Will there be a DC Ripple problem an system shutdown ?