Currently, in New Zealand, there is car-sharing, car rentals and taxis, all offering EVs.
The following links may help you:
Easy Transport Waiheke
Car Sharing: Because owning a car is no longer the future. Millions of people around the world are already very successfully car sharing. Remove the pains & costs of owning your own. Yoogo Share is a membership-based service and is free to join. They have bases in Christchurch and now Auckland. Vehicles available are BMW i3 and Hyundai ioniq.
EV Rentals: If you need a longer rental, try Europcars, available at Auckland, Wellington and Christchurch Airports. Vehicle type available is Volkswagen eGolf.
EV Taxis: Green Cabs currently operate in Auckland, Christchurch, Dunedin, Queenstown, and Wellington. (Nissan LEAFs)
Also on Waiheke Island, an all-electric service is available at Easy Transport. Offering Nissan LEAF and eNV200 van.