I know you are asking about the energy supply side (solar PV and battery, on/off grid), but what about the energy demand side of the equation?
Do you have options to reduce your energy demand? What is consuming all that energy?
We had pretty high energy demand as well with our first full year averaging 52.2 kWh/day, (high of 66kWh/day for the Summer quarter, low of 40 kWh/day for Autumn qtr) and aside from adding both grid-tied PV and eventually also off-grid PV + battery, we also took steps to reduce our energy consumption.
We've managed to reduce our home's annual average consumption by 20 kWh/day. I'm still working on that, more to do.
This makes the job of self energy supply and bill reduction much easier and cheaper as you need less PV and battery plus of course less energy imported from the grid.
Below shows our quarterly average daily energy consumption split by the source of energy supplying it (grid vs our own production) over the past nearly eight years:
View attachment 164066
This includes the additional second occupied dwelling added at start of 2020.
Our annual average grid imports are down by 45 kWh/day.