Evolving market resource co-ordination: Tie-breaker provisions consultation
Closing date for submissions 5pm Thursday 14 August 2025 and cross submissions 5pm Thursday 21 August 2025.
This consultation is to seek feedback on how tie-breaker situations should be resolved for multiple competing offers in the wholesale electricity market.
A tie-breaker situation arises when more, equally priced generation is offered at a single location than can be dispatched due to a network export limit. These situations are emerging in the market, and while not yet widespread or frequent, we are observing them in practice. As a consequence, generator owners and investors are increasingly seeking clarity and confidence on how tie-breakers are or will be resolved by the System Operator.
Your feedback will inform our decision on whether to progress to implement the proposed solution, (or a modified form of it), into our tools and processes. If we decide to proceed to implementation it could be in effect during the first half of 2026. If we instead decide to consider alternative options or approaches further, we are likely to re-consult on a different proposed solution.
Once we have considered the feedback we receive in response to this consultation we will publish our summary of submissions and the decisions we have reached having considered your feedback.
Consultation Documents
Providing feedback
Submissions should be emailed to [email protected] by 5 pm on 14 August 2025, with cross-submissions due by 5:00 p.m. on Thursday, 21 August 2025. Please include the phrase “Evolving market resource co-ordination: Tie-breaker provisions” in the email subject line.
If your submission or cross-submission contains confidential material, please ensure this is clearly identified and provide a version of your submission or cross-submission that can be published. Transpower takes no responsibility for identifying confidential information.
Please note that all information provided to Transpower is subject to potential disclosure under the Official Information Act 1982.