This will likely only last for a few years while LGC prices are high (as a result of the hiatus in construction of renewable energy generation thanks to Mr Abbott's election win).
After that they may take out a PPA, or if battery prices have fallen sufficiently, install a battery, charge it during the day, and sell the power from the battery during the evening peak.
CCE Price at posting:
3.0¢ Sentiment: Hold Disclosure: Held