Interesting output regards 800 W or 4 panels a 550W more or also less.
2400 W can be on DC side if Storage is built in
It will VDE conform only lets in or out 800 W ,can be with meter also done for self consumption.
Usually 900 € savings yearly can be achieved.
Of course depending which side your balcony or roof is , east ,west ,south
360€ or with storage 1200€ in Germany