Our generation assets

Explore how we power New Zealand

power station
Huntly power station

Huntly Power Station

The Huntly Power Station, by capacity, is Aotearoa’s largest (953MW*). Huntly (Raahui Pookeka) is on the banks of the Waikato River and is close to both Auckland and Hamilton. About 100 staff work there.

The iconic, orange-tipped power station has been producing energy for New Zealand for more than 40 years. Huntly is critical to the country’s energy security and will play an interesting role in the future as we move to a lower carbon future. When renewable energy generators (wind and hydro) are not performing due to weather or low lake levels, Huntly kicks into action. Global warming is an issue for the planet, so we are excited to be looking at trialing biomass at Huntly, substituting burning coal and gas and using a renewable source. Watch this space!

Tongariro power station

Tongariro Power Scheme

The Tongariro Power Scheme comprises three hydro power stations – Rangipo (120MW, underground), Tokaanu (240MW) and Mangaio (1.8MW) and has a catchment area of more than 2600 km2 in the North Island's central volcanic plateau.

The scheme gathers water from the mountains of the central plateau through Eastern and Western Diversions of the scheme. Water passes through a series of pipes, lakes, canals, and tunnels to the Mangaio, Tokaanu and Rangipo hydro power stations before entering Lake Taupo. The scheme employs 45 staff.

Waikaremoana power station

Waikaremoana Power Scheme

The Waikaremoana Power Scheme is a hydro-electric power development in northern Hawke’s Bay and consists of three power stations fed from the Lake Waikaremoana. The scheme is located between Te Urewera and Wairoa, along the upper 7km of the Waikaretaheke River. The 138MW hydro scheme comprises three power stations – Kaitawa (36MW), Tuai (60MW) and Piripaua (42MW).

Water is taken from Lake Waikaremoana via tunnels to Kaitawa Power Station, before being discharged into Lake Kaitawa. It is then passed through Tuai Power Station and discharged into Lake Whakamarino. From there, water is carried by tunnel to Piripaua Power Station and is discharged into the Waikaretaheke River.

Tekapo power station

Tekapo Power Scheme

The Tekapo Power Scheme is at the head of the Waitaki Valley in the Mackenzie District of the South Island. It has been owned and operated by Genesis since June 2011.

The scheme has a generation capacity of 190MW and uses water from the glacial-fed Lake Tekapo/Takapō to generate electricity through two power stations – Tekapo A and Tekapo B. Tekapo B sits in the bed of Lake Pūkaki, with outflows entering the lake directly. On average the scheme generates enough energy to power the equivalent of 121,000 average Kiwi households.

Wind turbines

Hau Nui Wind Farm

Hau Nui Wind Farm is in the hills south of Martinborough in the Wairarapa. Its location is ideal for a wind farm, as wind currents are funnelled and accelerated through the nearby Cook Strait and over the Rimutaka Range. The wind farm’s 15 turbines have a combined capacity of 8.65 MW.

Workers at plant

Kupe Joint Venture

The Kupe Joint Venture is an integral part of the company's business and provides a diversified source of revenue. Genesis, through wholly owned subsidiaries, has a 46% interest in the Kupe Joint Venture, which owns the Kupe oil and gas field situated off the south Taranaki coast. Genesis receives 46% of the natural gas produced. We sell it to retail customers in the North Island and use it for electricity generation at the Huntly Power Station.

*Electrical power is measured in watts (W), kilowatts (kW), megawatts (MW) or gigawatts (GW). 

1,000 W = 1 kW 1,000,000 W = 1 MW 1,000,000,000 W = 1 GW 

Kilowatt hours (kWh) are used to measure how much electricity or electrical energy a household uses over time; they’re often called “units” on your electricity bill. Larger electricity users such as large factories measure their consumption in megawatt hours (MWh) or gigawatt hours (GWh). 

For example, a 1kW heater running for an hour will consume 1kWh of electricity or electrical energy.  

Average households in New Zealand use about 8,000kWh of electricity per year. 

(Source: Electricity Authority