The expansion of the Ngawha geothermal power station is expected to play a key role in Top Energy's future and the Far North community.
The $176 million project will add 28MW of generation capacity at the Ngawha site, more than double its current generating capacity.
Chairman Richard Krogh said strong performance from the Ngawha geothermal power station in the 2017/2018 financial year further underlined the approval by the company's board and shareholders for expansion of the station east of Kaikohe.
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"Over the long term, we expect the larger Ngawha to reshape the company's revenue and balance sheet and add value to the Far North economy for decades to come."