Here is the layout of panels on a North facing roof there is space for another 3 also shown is the Solar Geyser which feeds the house main geyser, so the internal geyser (set to 50 Deg C) is filled with preheated water (45 in winter to 80 Deg C in Summer) so the need for electrical water heating is minimal.

Here is the Battery installation

The Inverter and MPPT Controller (great equipment)