Just to put the range of the Roadster into perspective. 620...

Just to put the range of the Roadster into perspective. 620 miles is 997km. Frankston to Gosford via toll roads is 998km.
Anywhere in Melbourne to anywhere in Sydney via the Hume is achievable without recharging.
If you were going to stop along the way, at a Tesla charging facility you are looking at quite a bit further than that.

The Chevy Bolt is now available in all states in the US and sales are increasing, while the Chevy Volt Hybrid sales are declining.
http://ev-sales.blogspot.com.au/2017/11/usa-october-2017.html