I have 3 Multiplus 2 in parallel and want to use them in a one-phase grid-system (230V IT) with ESS. Wiring the MPPT and the battery seems easy with a busbar etc. But what about the AC in and out?
I am not allowed to put more than 16A back to the grid.
The load on AC out 1 will not exceed 230V/25A.
The load on AC out 2 will not exceed 230V/25A.
No wires/cable need to be longer than 100 cm.
Question 1: How big should the fuse between the Multipluses and the grid be? 50A?
Question 2:
A: For ballancing the current, do I have to wire each Multiplus directly to the fuse both against the grid and against the load fuse on AC out 1 and 2?
B: Or is it possible to wire the Master Multiplus against the fuses and wiring just between the other two Multipluses?
Question 3: If 2A is correct, I assume that all wires have to be equal and that the size of 2,5mm2 should be nice? Or is it even enough with 1,5mm2?
If 2B is possible, will the wiring be the same?
Anyone that can help me?