For those who don’t know how our electricity grid work, this post is just a starting point, introducing how  the mix of generators bid, to satisfy demand projected by AEMO. Price is low when demand is low, satisfied by wind and/or brown coal. Price is high when demand is high. Here the peak is $240 per MWh which corresponds with 24cents/kWh, wholesale, which means your retailer doesn’t make much money at peak time but, obviously, you’re paying a big premium when demand is low. There’s a ceiling price for bids, a cool $13,100/MWh. All generators receive the same price as the last high bid accepted to fulfil demand.

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