Probably not. Rooftop parking with solar shades for charging makes tremendous sense, but EV batteries are mostly going to be a demand management solution. Australia has a pretty unreliable grid compared to Europe per SAIDI and SAIFI stats, as well as an absurd percentage of detached homes, so vehicle to home might make sense. Unlikely though, as Australia is a tiny market served by mostly Asian car companies now, and aren't likely to build a lot of V2H into their vehicles just for those weirdos in detached homes in Oz. ;)