Summary
- CDC Data Centres and Contact Energy are assessing a 250MW IT data centre at Stratford, New Zealand.
- The project would sit beside Contact's retired Taranaki Combined Cycle station, where grid, fibre, battery, and generation infrastructure already exists or is proposed.
- The model closely resembles European attempts to redevelop former power and industrial sites around existing grid access.
CDC Data Centres and Contact Energy are assessing a 250MW data centre at Stratford in New Zealand’s Taranaki region, using land beside a retired gas power station where grid infrastructure, fibre connectivity, battery projects, and potential new generation are already concentrated.
The partners intend to seek resource consent for a facility with around 250MW of IT load. Contact estimates total peak load could reach approximately 350MW once ancillary demand is included, subject to final design.
The proposed site sits near Contact’s former Taranaki Combined Cycle station, which reached end of life. Rather than treating the retired generation property as obsolete industrial land, the companies are assessing whether its energy and network infrastructure can support a new large electrical load.
Contact said electricity for the data centre is intended to be supplied under a long-term contract supported by new generation from its pipeline of geothermal, wind, and solar projects. A co-located battery development would also support the project.
A retired power site already has useful infrastructure
Stratford has several characteristics developers would otherwise have to assemble independently. Contact says 500MW of grid-scale batteries have already received consent around the site, an existing grid connection is available, and terrestrial and subsea-linked fibre provides onward connectivity towards Auckland.
Contact’s joint venture with Lightsource bp is separately progressing an option for a 150MWac solar development with integrated storage nearby, although that project remains subject to its own consents, financing, and investment decisions.
The data centre partners are also examining technology intended to manage rapid changes in demand and improve reliability during peak or dry-year conditions. That is particularly relevant in an electricity system where generation availability and hydrological conditions can alter the supply balance.
Existing energy infrastructure does not mean the data centre can simply connect and operate. A 250MW IT load is large enough to require detailed studies around network capacity, protection, transformers, voltage, generation adequacy, harmonic behaviour, and the effect of fast-changing compute demand.
The site nonetheless demonstrates why former power stations are becoming attractive digital infrastructure locations. They frequently combine large industrial plots with transmission access, operational energy expertise, transport links, permitting history, and a workforce familiar with critical plant.
The brownfield power model has European parallels
DataCentral recently covered Uniper’s plan to redevelop part of Germany’s Staudinger power station for data centres, storage, and new generation. Similar projects are appearing as utilities reassess sites built around large electrical connections that are no longer fully used by conventional generation.
The model can shorten one part of the development process, but it does not create free power. Retired generators may leave network capacity behind, yet a new data centre still requires sufficient generation across the wider system and a commercial arrangement that makes electricity available when the compute load needs it.
Contact’s approach is to pair long-term data centre demand with investment in new generation and batteries rather than rely solely on existing supply. Large contracted loads can improve the investment case for generation because they give developers greater confidence about future electricity demand.
The arrangement therefore reverses the usual sequence in which a data centre developer searches for an available utility connection. Here, an energy company with a former power site is working directly with an operator to shape generation, storage, network, and data centre development together.
CDC focuses on secure and sovereign infrastructure across Australia and New Zealand. The Stratford proposal is expected to target critical workloads including government, health, emergency services, research, and financial systems if it progresses.
Resource consent remains a significant next step, and the parties have not made a final investment decision. The project will also need to demonstrate that its generation, storage, and grid arrangements can support several hundred megawatts of new demand reliably.
For European developers watching the project, the useful comparison is physical rather than geographic. Retired energy assets contain many of the ingredients that new data centre campuses struggle hardest to secure: land, power infrastructure, grid interfaces, and experienced industrial operations. Stratford will test how much of that legacy can be converted into usable digital capacity.
