A massive, co-ordinated effort to help more people into electric vehicles could reshape the country's entire energy system, a new report says.

EV advocacy group Drive Electric launched its 'State of the Nation' report at Parliament today, calling for consistent, cross-party policies to get more battery EVs and charging infrastructure on the road.

New Zealand's access to renewable energy gave the country a huge structural advantage, but policy changes that axed many incentives meant uptake was now lagging, the report said.

EVs should no longer be thought of as "just vehicles", it said.

Their ability to store power made them "mobile energy assets that could reshape how New Zealand generates, stores, and uses electricity".