https://www.newshub.co.nz/home/politics/2018/09/government-promises-decent-incentives-for-electric-cars.html

From the above:

The Government will soon offer incentives to New Zealanders looking to purchase electric vehicles, to move people away from traditional cars that burn fossil fuels. 

"What we're trying to do is get a package that incentivises your middle class people to be able to do that, but also ensures that low income families aren't left behind," Climate Change Minister James Shaw told The AM Show. 

New Zealand now has around 10,000 electric vehicles, compared to just 250 five years ago, so there is an "exponential growth rate," Mr Shaw says. But that's only a quarter of one percent (0.25 percent) of the total vehicles on the roads. 

So perhaps it may pay to hold-off buying a new EV until these incentives come into force?