Security of Supply

At a national level, hydro storage has remained below the tenth percentile since late June. However, the immediate risk to security of supply remains low due to thermal generation availability and declining risk curves from now until summer.

Over the past week national hydro storage has increased by six percentage points to 70% of the historical average for this time of year. This was due to the large South Island inflow event at the start of this week, the largest peak event since February this year.  South Island hydro storage moved up seven percentage points to 74% of average. At a regional level the largest increases were at lakes Manapouri and Te Anau as they moved from 56% and 67% of full to 75% and 105% of full respectively. North Island hydro storage decreased by eight points to 39% of average, with below average inflows for last week.

Following the recent work at Pohokura, production was above 170TJ a day for five days last week, a level not reached since the end of June.

Nationally, weekly electricity demand dropped by 1% to 814 GWh. 

Further information here.

New Zealand and South Island storage are both in the Normal range.


Hydro Information

Further information here.

Storage decreased in the North Island and increased in the South Island over the last week, with South Island storage at 45% of full and North Island storage at 24% of full.


Market Indicators

Further information here.

Renewable generation over the last seven days was 75% of total generation, with hydro generation accounting for 53% of total generation.


Policies and Publications

Includes information on the Annual Assessment and Transpower policies related to Security of Supply: the SoSFIP, EMP, and SOROP.


Currently no consultations.