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Wholesale electricity is sold and priced in a formal real-time market. These charts record the average monthly price for each of three reference points, Otahuhu in Auckland, Benmore in the South Island, and Haywards in Wellington. The Haywards reference point is important as it is the 'entry point' into the North Island for South Island hydro generation, via the Cook Straight cable. This series has not been available since January 2017.
We also include a daily chart of average prices for Haywards, which shows the supply-and-demand volatility during the month.
Pricing displayed here is $ per megawatt hour.
Note that we no longer can source the monthly average data. Only the daily Haywards reference price is now being updated.