Security of Supply

National hydro storage decreased by two points to 83% of average for this time of year. Both North and South Island storage decreased by two points to 99% and 82% of average  respectively. Hydro storage has dropped just below the 10th percentile of historical positions for the time of year. Despite this the risk to security of supply, as represented by the storage above the risk curves and expected storage trajectories, remains low at this time.

Low inflows continue to be observed around the country, at a level of 80% of average over the last four weeks.

Demand was 744 GWh this week; a small rise on last week.

The generation mix was comprised of 52% hydro and 6% wind over the last week. Renewable sources made up 78% of total generation mix.

Yesterday we published an invitation to comment on the scenarios and sensitivities that we intend to cover for this year's annual security of supply assessment. We look forward to receiving your feedback by the 17 March.

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 South Island over the last week, with South Island storage at 69% of full and North Island storage at 56% of full.


Market Indicators

Further information here.

Renewable generation over the last seven days was 78% of total generation, with hydro generation accounting for 52% 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.