We are still on the "massive" $0.07 import rebate till July, at that time our system is 10 years old and will be transferred to the new DEBS scheme.
With our EV, we have a Zappi which is setup to charge only if there is surplus of power generated.
So instead of exporting it to the grid for nothing, it will charge our car.
That means charging our car will be even cheaper. From 7cents/kW it will be 2cents/kW.
We were thinking of adding panels, but it is the same as what RebsWA mentioned, panels are too old and only 260W each.