• Historical analysis of electricity costs

  Published: 29/01/2014 12:00am

  We have published a report comparing retail prices to the average costs actually incurred to supply electricity to consumers. Read More

• High North Island prices coinciding with HVDC test on 3 October 2013

  Published: 09/12/2013 12:00am

  We initiated an enquiry into the reasons for unusually high North Island prices on 3 October 2013. Read More

• High spring washer price situation of 20 June 2013

  Published: 09/12/2013 12:00am

  On 20 June 2013, the provisional spot electricity price reached $8,336/MWh at Lichfield (LFD1101 and LFD1102) and $6,523/MWh at Kinleith (KIN0331) for trading period 41 (20:00). Read More

• Impact of incorrect metering situation for 28 April 2013

  Published: 09/12/2013 12:00am

  On 30 April 2013, the pricing manager (NZX) informed us of a falsely detected metering situation for trading periods 06:00 to 23:30 on 28 April 2013. Read More

• Impact of HVDC pole 3 commissioning on the wholesale electricity market

  Published: 09/12/2013 12:00am

  We initiated an enquiry into the impact of the HVDC pole commissioning tests on the wholesale electricity market. Read More

• Enquiry into increased market prices from 27 February 2013

  Published: 09/12/2013 12:00am

  Surplus hydro storage in the South Island in January 2013 was followed by an extended period of very low inflows in both islands. Read More

• Enquiry into manual price publication for trading period 31 on 26 February 2013

  Published: 09/12/2013 12:00am

  The provisional price schedule contained infeasible prices at the Studholme and Oamaru market nodes in trading period 31 on 26 February 2013. Read More