How reliable is your electricity supply?

Orion manages one of the most advanced electricity distribution networks in New Zealand. On average our customers will have power 99.98% of the time.

At Orion we have security standards, or levels of network performance, that we strive to meet.

The two key industry measures of network performance are:

  • the average number of outages per customer per year (SAIFI: system average interruption frequency index);
  • and the average total duration of outages per customer per year (SAIDI: system average interruption duration index).

During 2017-18 on average a customer would have had 1.0 network outages for a total time of about 79 minutes. 

Our network reliability is better than average by New Zealand standards but our network outages are higher than the pre-quake levels. We are on track to return our performance to pre-quake levels by 2019. This report by the Kestrel Group outlines resilience lessons from the quakes.

We have a Security of Supply standard that has been developed in consultation with key stakeholders. This ‘table of rules’ describes the service we aim to provide on our network.