Electric vehicles in Australia’s eastern states are responsible for more carbon dioxide emissions than regular petrol vehicles, according to an expert report that warns Labor’s green cars policy would require up to $7 billion in upgrades and installation of recharging infrastructure across the nation.

A pre-election briefing obtained by The Australian, which was prepared by engineering firm ABMARC, concedes the immediate benefit of electric vehicles in Australia “is not guaranteed”. It also states Bill Shorten’s electric vehicle target of 50 per cent of new car sales by 2030 would need between $5bn and $7bn in recharging infrastructure and additional investment in “switchboards, transformers and poles and wires”.

“Installing this level of charging infrastructure would require a significant increase in the rate of investment in recharging infrastructure,” the report says.