Having PV-panels (MPPT regulator) and Lithiumbattery connected to a Multiplus 48, how do I practically wiring the Multiplus to the grid if I want to feed back current to the main grid? From the el-companys grid meter, the current is connected to a main fuse (3-phase) and the load of the house is connected to that main fuse. Does the Multiplus feed back trough a cable connected just between a fuse in the main grid and the AC-in terminals at the Multiplus? Or is it necessary to also connect a cable to the AC-out and to the grid? But to where? To the same point (fuse) that goes to the AC-in? Or is it like you wiring the grid meter directly to the Multiplus (AC-in) and wiring the AC-out to the main fuse and the load of the house?