I Have 31 panels, half from 2010, and about 7.2 kW with AGL as a provider. We have set up a common charge position so we can add a small i3 for inner city driving; it arrives in early November and will lower our electricity use driving in the city.
I agree maximisation of self consumption is the key and our home will have domestic storage (LG) soon to help with that, but it seems the distributors over the next two years will be adopting "cost-reflective" tariffs which prioritise maximum kW usage at different times of year. You may end up with a modest constant kWh energy charge plus a very aggressive peak kW charge which may be about 3 kW at the minimum charge level. So the function of storage will be to minimise grid draw to some desirable level - say 3 kW - and any extra would be taken up by storage and the PV array when it is active. The storage could be filled by below 3kW draws as well as PV. Of course with two electric cars around and at least one there a lot of the time, it would be great to use their huge batteries for peak-lopping, but I don't see any evidence of this happening soon.
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Incidentally, with low kW draws from the grid prioritised, the emphasis on home charging will be to stretch out the charging times for your EVs. With two of them, you would probably have sequential low amperage charging settings during low demand periods like overnight. So 22kW home charging may be off the table.
