Trustpower is New Zealand's fifth largest electricity generator (in terms of MW capacity, GWh output and revenue) and the fourth largest electricity retailer (in customer numbers), serving 260,000 customers throughout New Zealand. The company owns and operates 34 power stations. It generates 100% of its electricity using renewable energy sources, primarily hydro-electric but also wind farms.
The company has two major shareholders: Infratil owns 50.5% and the Tauranga Energy Consumer Trust (TECT) owns 33.0%.
On 2 November 2008, Trustpower opened Stage 1 of the Snowtown Wind Farm, its first wind farm in Australia. The wind farm is near the township of Snowtown, 170 km north of Adelaide, and will generate 370-380 GWh pa with 47 wind turbines. Project cost is $220 million. The project was completed in November 2014.
The Myponga Wind Farm was a $120m project of 16 wind turbines, to be located near Sellicks Hill on the southern outskirts of Adelaide. Trustpower abandoned this project in 2009.