Publications and resources

Our 2019/20 Annual Report is a print-friendly PDF file that includes our corporate governance and financial statements,...

In the rare event of a lightning strike or fault on the transmission line, towers or poles may transfer high voltage and dangerous currents into the ground for a very short instant. This is...

Transpower regularly publishes a Transmission Planning Report (TPR) which details the grid asset capability over the next 15 years. ...

Advances in battery technology are expected to play an important role in enabling our energy future. Distributed Battery Energy Storage Systems (BESS) in New Zealand examines the operational...

Transpower regularly publishes a Transmission Planning Report (TPR) which details the grid asset capability over the next 15 years. ...

Transmission Tomorrow - Our Strategy 2018 sets out our vision of New Zealand's electricity industry over the next 5 - 40 years.

We have undertaken an investigation of the Value of Lost Load (VoLL) to inform our expenditure decisions and regulatory applications. ...

A supporting document to our 2018 Integrated Transmission Plan, the Asset Management Plan explains how we undertake asset management.

This report builds on the 2017 Services Report, describing the grid output measures for our regulated transmission business for the third regulatory control period (RCP3) of...

Auckland is changing. Rapidly. Roads, housing, technology, industry and electricity. ...