News

The levelised cost of electricity

In New Zealand, more electricity generation is needed to meet future electricity demand and replace retiring thermal power plants. The initial build costs of n…

Let the sun shine!

New Zealand’s first megawatts (MW) of solar power were generated and sold on the wholesale market last week. Kaitaia solar farm, in the far north of the North …

Wind power sets new records

Several new wind farms connected to the grid and started operating this year – Turitea, Kaiwera Downs and Harapiki. Find out how this has increased capacity an…

All Blacks “demanding” support from home with electric performance at RWC 2023

There was a wave of change as New Zealanders got back on side with the All Blacks as they steadily progressed through each battle to the 2023 Rugby World Cup f…

Security of supply while two thermal generators are on outage

The ability of electricity supply to meet demand over time is referred to as 'security of supply'. It's about the availability of enough generation capacity ea…

How firming renewables will impact the electricity sector

Aotearoa New Zealand’s electricity system is transforming. More renewable electricity generation, like wind and solar farms, are being built to meet increasing…

The changing nature of electricity demand in Aotearoa

Electricity in New Zealand is supplied by hydro, geothermal, thermal and wind generation. Hydro and thermal generation have some capacity to store energy – in …

The electricity sector transition

New Zealand’s electricity system is transforming. In 2019, the Government passed a law targeting net zero greenhouse gas emissions by 2050. To achieve this goa…

High hydro levels and wholesale prices

New Zealand produces over half of its electricity by hydro-electric dams. Upstream of these dams, lakes preserve water from rain and snow for later electricity…

Spot market price volatility in May 2023

In May 2023, the electricity spot market experienced extreme price volatility. Spot prices swung between $0.01 and $3,350/MWh. However, despite occasionally hi…

Solar generation now and in the future

There is currently around 270 MW of installed solar generation in New Zealand. This adds up to about the same capacity of a coal or gas fired Rankine generatio…

First instances of reserve scarcity pricing under real-time pricing

The Electricity Authority implemented real-time pricing for the wholesale electricity market in November 2022 in collaboration with Transpower and the wider el…

Southern lakes, the HVDC and thermal powered generation

Electricity demand and generation differ across New Zealand’s two main islands. The South Island has abundant hydro generation, while the North Island contains…

The New Zealand gas market

The Electricity Authority monitors how much gas is being used to generate electricity and how the short run marginal cost of gas is changing each month, with c…

HVDC inter-island cable: Benmore to Haywards

The high-voltage direct current cables (HVDC) electrically link the North and South Islands of New Zealand and are a vital piece of national infrastructure. Th…