For those interested in whole sale price market, below is the...

For those interested in whole sale price market, below is the link.

https://aemo.com.au/en/energy-systems/electricity/national-electricity-market-nem/data-nem/data-dashboard-nem


Observations:
- price volatility is high, due to the weather-dependent nature of renewables. . E.g. Price can be driven to negative usually during the day, when solar panels are online, causing supply to exceed demand. On the other hand, price usually peaks during evening, when demand is high and solar is offline.
- coal-based generation dominates the generation, contributing up to 70~80% of the supply. Coal-based generator continues to supply at negative price, due to factors such as the high cost of switching off coal generation and having hedging contract in place to supply at fix price.

I think the role of coal fired station, as Australia transitions to a renewable society, remains critical over the next 5 to 10 years, due to its ability to fill the blackout period in renewable energy, such as during night time/peak demand/unfavourable weather conditions, until mass scale battery system is economically enough to be built. In terms of commercial viability, AGL would need to manage its generator's output for situations such as oversupply or demand spike, reduce running cost, and secure contracts to buy cheap coal and hedge its electricity selling price, when optimal.