Labour would require data centres to secure their own renewable power

At a glance

• Labour published its AI policy on 9 September 2026 with four conditions for data centres, covering renewable supply, connection costs, demand at peak stress and water.

• The National Party got there first, on 14 August 2026, with one line in its South Island plan: data centre projects to be accompanied by new, firmed generation, meaning backup supply for the hours renewables run short.

• Datagrid is building a 280MW campus in Southland, CDC operates a 54MW campus in Auckland, and Contact Energy has a 250MW proposal in Taranaki.

• On 26 July 2026 the Green Party asked for a one-year pause on consenting AI data centres, which co-leader Chlöe Swarbrick set at facilities above 50MW.

• Christopher Luxon commissioned a set of principles for the sector on 27 July 2026, and New Zealand votes on 7 November 2026.

The National Party, which leads the government, put its data centre rule in its plan for the South Island on 14 August 2026. Labour published AI in New Zealand's Interests on 9 September 2026, during the Aotearoa AI Summit in Wellington.

Labour's condition is that a campus "secure their own renewable energy supply". National's is that a project be "accompanied by new, firmed generation". For a developer that is the difference between signing a power purchase agreement and funding a power station. Neither party has published the megawatt figure at which its rule would apply.

Datagrid is building a 280MW campus in Southland, Contact Energy and CDC have a 250MW proposal in Taranaki that has not been lodged for consent, and more connection enquiries sit with the grid operator Transpower behind New Zealand's data centre build.

Labour names four conditions on energy and water

Labour set out the requirement in the infrastructure section of its policy. "We will require data centres to secure their own renewable energy supply, pay for their own connection costs, reduce electricity demand during peak stress periods, and use water efficiently," the document says. The purpose comes in the sentence before it: rules for large data centres "so their growth does not leave households and businesses carrying the cost or put pressure on water and electricity supplies". Labour ends the section with what it calls a simple approach, "the right-sized data centre in the right place, with the companies that benefit carrying their fair share of the cost".

Labour lists the same requirement among five tests it says will guide a Labour government's AI decisions: "Are AI companies using energy, water and land responsibly and carrying their fair share of the costs?" A Labour government would also "look at how to strengthen New Zealand's control over its data", and would work with iwi and hapū, the Māori tribal and sub-tribal authorities, on the governance of Māori data.

Labour's science, technology and innovation spokesperson Reuben Davidson put the energy condition in cost terms in the party's release: "We'll also make big data centres pay their own way, securing their own renewable energy and covering their own connection costs." Davidson announced the package with Labour leader Chris Hipkins at Victoria University of Wellington's technology hub, the Otago Daily Times reported.

National requires firmed generation alongside each project

National published its requirement as a single bullet on 14 August 2026: "A new requirement for data centre projects to be accompanied by new, firmed generation." Firming is the backup supply that covers the hours renewables run short. The reasoning came in National's policy statement, as interest.co.nz reported: the requirement "means the development of digital infrastructure doesn't put upward pressure on power prices for households and businesses, while giving energy developers the committed customers they need to finance new generation".

Prime Minister Christopher Luxon had made the same argument on 27 July 2026, when he rejected a Green Party call for a consenting pause and asked officials for a rulebook. He called it additionality, meaning new load matched by new supply. "It depends a little bit on size as to what would be needed in terms of additionality," he told 1News. "But certainly large ones, absolutely, we need to make sure that there is additionality." Energy Minister Simeon Brown told 1News on 9 August 2026: "At a principled level, I want AI data centres underwriting new generation and growing generation in New Zealand."

Source: Labour, AI in New Zealand's Interests; National, plan for the South Island; Green Party release, at the dates shown.

Mercury, the generator-retailer holding a 140MW fifteen-year option to buy power for about half the Southland campus, told RNZ on 27 July 2026 that data centres "should be coming on stream with additional power to make sure that it's contributing to New Zealand's grid". Chief executive Stew Hamilton told analysts in August 2026 that the rate at which his company can build power stations limits how many campuses it can serve.

Labour's policy also commits a Labour government to "work closely with Australia to align standards and approaches where doing so benefits New Zealand". Australia's National Cabinet backed mandatory standards on 26 August 2026 requiring large data centres to be net generators, putting at least as much power into the grid as they take out. Any New Zealand rule would run through one of three existing channels: consent under the Resource Management Act, connection agreements with Transpower, or the principles Economic Growth Minister Nicola Willis and the Department of the Prime Minister and Cabinet have held since 27 July 2026.

Chlöe Swarbrick puts the Greens' pause threshold at 50MW

Labour's framing sentence says "large data centres", the requirement itself says only "data centres", and National's bullet says "data centre projects". Labour's answer on the detail is that "getting the detailed settings right will take time and proper consultation".

The Green Party has published a figure. On 26 July 2026, co-leader Chlöe Swarbrick set the threshold for the pause her party sought at facilities "defined internationally as consuming in excess of 50 megawatts of power".

Two of the data centres in New Zealand sit above 50MW on disclosed capacity. Datagrid's 280MW Makarewa campus near Invercargill has been under construction since 18 August 2026, and CDC's 54MW Hobsonville Campus Two in Auckland is operating. Contact Energy's 250MW Stratford proposal with CDC would sit above the line too, and Contact has said development there depends on securing anchor tenants, meaning customers that commit in advance to a large share of capacity, plus approvals and project finance.

Labour's fourth condition asks for efficient water use. Datagrid holds a permit for 220 million litres of groundwater a year at Makarewa and told a Southland business audience in August 2026 that it expects to draw under 66 million litres a year from all sources, primarily rainwater.

What to watch

The principles Luxon commissioned. Willis and the Department of the Prime Minister and Cabinet have held them since 27 July 2026.

A threshold. Labour has promised consultation on the detailed settings, and the timetable for that consultation is the next thing to look for.

Whether National's firming has to be renewable. The Green Party responded on 14 August 2026, with Swarbrick saying the announcement was "intentionally silent on whether their proposal for new firmed energy is renewable".

Mercury and Contact. Mercury holds the 140MW option at Makarewa and Contact would build Stratford, and each has publicly backed new generation arriving alongside new load.