Large petrol-driven cars are taxed heavily while EV buyers don't pay import taxes or VAT in Norway, where cars and petrol are expensive.
Free inner city parking at chargers and permission to use bus lanes also helped boost uptake but these incentives are being wound back with more decisions being made by different cities.
In September 10,600 new cars sold in Norway were electric, dwarfing New Zealand's fleet which stands at just 11,000 registered EVs although the rate of increase in the fleet is accelerating.
More than 5000 have been registered in this year alone and more than 30 key companies have committed to a fleet of 30 per cent of EVs by next year.
The last government set a target of 64,000 EVs in New Zealand by 2021, still a tiny fraction of the 3.38 million light vehicles on the road.
Bu said central government and local government agencies needed to commit to buying more EVs and where appropriate ministerial cars should also be electric.
New Zealand, with around 80 per cent of power generated from renewable sources, was ideally suited for EVs and more of them would avoid the need to import expensive oil.
Lines company Vector earlier this year said this country need to build a strong electricity infrastructure to handle electric vehicle uptake.
It said the amount of power required to charge an EV with a long-distance battery, at home in the suburbs, could strain existing infrastructure.
Bu said smart charging could help alleviate stress on infrastructure and batteries in cars can also feed power back to the grid.