Australia's number 1 problem is that the grid itself is too expensive. That isn't the Coalition, because it has been happening through the late Howard, Rudd-Gillard-Rudd, Abbott and Turnbull governments. Typical slow government problem, not any particular party. Obviously you aren't talking about that, so I didn't mention it.
Australia's number 2 problem is all our power plants are aging and shutting down. I addressed that; because you seemed to be talking to it (eg, Liddel is only achieving something like 46% capacity). That is a looming issue. The problem here is also not the Coalition, as I mentioned.
Now SA appears to have a tertiary problem which is they have lots of wind energy and not enough storage to balance out the grid. The battery is addressing that and seems to be going well. This is also nothing to do with the Coalition, because the SA state government controls SA and the majority bounces between the two majors. The Weatherill government seems to have had the battery installed extremely quickly despite whatever you think the Coalition did to prevent it.
You aren't assigning blame correctly here. The big picture problem isn't that gas prices are high, and power problems aren't happening because of "mostly the Coalition".