There are a few dashboards around. I saw someone shared their own personal (next level!) grafana dashboard.
- Transpower offers a Live system and market data view: https://www.transpower.co.nz/system-operator/live-system-and-market-data
- Transpower offers EM6 Live: https://app.em6.co.nz/
- The Electricity Authority (EA) has: https://www.emi.ea.govt.nz/
- EA also offers historical datasets: https://www.emi.ea.govt.nz/Retail/Datasets
The open data situation for electricity information in New Zealand is "pretty good". The main problem is that people in charge see commercial value in up-to-date cost and usage information so the "free data" is delayed. This prevents people from using near real-time data to improve efficiency of their own power systems.
This paywall exists because of the belief that profit is more important than climate action.
The old version of EM6 was so much better :(