Top Energy’s Ngawha geothermal power station was first commissioned in 1998.
Subsequent scientific investigation showed the plant’s output could be expanded without affecting Ngawha's geothermal field reservoir pressure. So in 2003, the Company began to push forward with its Stage 2 expansion plan.
In late 2008, Top Energy completed its $77 million expansion of the original plant.
Now with a capacity of 25MW, the Ngawha Power Station’s output is fed into Top Energy’s network and then connected to the National Grid, via Top Energy's sub-station near Kaikohe.
The Station consistently produces around 70% of all electricity consumed in the Far North, which reduces the community’s exposure to possible National Grid failures to the South.