We'll be subject to a carbon tax whether we like it or not simply because the OECD countries have signed up to a Carbon Neutral status by 2050 (China by 2060)
The former Lib/Coalition Government agreed to that 4 years ago and Labor, if anything, will accelerate that process.
So, IMO, if you have a house, just install Solar while Governments are offering very generous subsidies & you can subsequently install a storage battery later to charge up the car overnight should it be economically beneficial to do so.
That said, State Governments will likely levy a km change to cover roads and transport infrastructure whereby gizmos in the car will transmit kms to a Government receiving stations for automatic debiting of your credit card like the Toll charging system with a similar system for avoidance.
