Electric vehicles could reduce NZ’s fossil fuel dependence – but is our grid ready?

Fuel prices have fluctuated in recent weeks as conflict in key oil‑producing regions disrupts global supply routes. For New Zealand, which imports most of its transport fuels, these swings flow quickly into household budgets, freight costs and inflation pressures.

Professor Nirmal Nair, a leading energy systems expert at the University of Auckland, says the latest volatility shows how exposed New Zealand is to global fuel shocks - and why the country needs to rethink how it powers its transport system.

Only about 130,000 of New Zealand’s 3.5 million light passenger vehicles are electric - around 3.5 percent. In Norway, a country of similar size with about 2.9 million registered vehicles, more than 30 percent of the fleet is now electric.

Nair says Norway’s rapid uptake didn’t happen by accident. The country introduced long‑term incentives starting in the 1990s, including a full exemption from its high vehicle sales tax for EVs. More recently, it added a polluter‑pays tax on high‑emission vehicles, making petrol and diesel cars significantly more expensive.

"Policies matter - and if we want higher EV uptake, we need to make intentional choices as a country," he says.

New Zealand has a strong starting point: most of its electricity already comes from renewable sources such as hydro, geothermal and wind, and the national grid has reliably powered the country for more than a century. But Nair says the system will need to adapt as EV numbers grow, particularly around how electricity is priced and when people charge.

He says the wholesale electricity market already gives companies confidence to invest in new renewable generation, but the retail side - the prices households and businesses actually pay - needs attention.

"It's a policy decision that government, grid owners, regulators and retailers will have to collectively come together to address."

Nair says EVs offer clear advantages in a world where oil markets can shift overnight, especially when powered by New Zealand’s renewable electricity.

"Electrifying transport is one of the most effective ways to cut emissions and lower operating costs," he says.

New Zealand’s Zero Carbon Act, passed in 2019, commits the country to reaching net‑zero emissions by 2050. Meeting that target will require electrifying more of the transport sector and industrial heating - areas that currently rely on fossil fuels like petrol, diesel, gas, coal and even wood.

Nair says switching these activities to clean electricity is one of the most effective ways to cut emissions and reduce long‑term energy costs. However, he warns that infrastructure gaps still need attention, from charging access to battery lifecycle management. This is where engineering research becomes crucial.

"Researchers at the University of Auckland have been preparing for this shift for decades. Their work spans safe large‑scale grid integration, battery innovation, charging optimisation, and policy design. These insights are essential to ensuring EVs can be adopted safely, affordably and at scale."

He says the long-term goal is clear.

"Building a resilient, low‑carbon transport system will make New Zealand less vulnerable to global shocks and better prepared for the future."