Closing date for cross-submissions 5pm Thursday 21 May 2026.
Transpower, as the system operator, is responsible for publishing the medium-term security of supply assessment (SOSA) annually. This assessment provides a 10-year assessment (2026 to 2035) of the balance between supply and demand in the New Zealand electricity system.
Its purpose is to inform risk management and investment decisions by generators, other market participants, and investors.
It forms part of New Zealand’s electricity security of supply framework. The system operator performs other security of supply-related functions described in the Security of Supply Forecasting and Information Policy (SOSFIP) and the Emergency Management Policy (EMP).
We are seeking feedback on the Draft 2026 SOSA to consider prior to the final publication which will be no later than 30 June 2026.
Consultation Documents
Submissions
We received six submissions listed below.
| Gas Industry Company | View |
| Genesis Energy | View |
| Mercury Energy | View |
| Meridian | View |
| MEUG | View |
| Taranaki Offshore Partnership | View |
Providing feedback
Consultation cross-submissions for this year’s assessment should be emailed to s[email protected] by 5 pm on 21 May 2026. Cross-submissions received after these dates are unlikely to be considered. Please include the phrase “2026 Security of Supply Assessment Submission” in the email subject line.