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Coal the Reality's
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I accept the Sydney housing situation is as you've described, but I'd expect the chances of having to resort to load shedding to be remoter in Sydney.
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JBowyer,
It's cheaper to generate electricity from renewables because the fuel cost is zero.
Fifteen years ago, when we were jut getting started with renewables, they did work out as more expensive than fossil fuels because of their high capital cost. But since then two things have happened to change the economics: firstly the capital costs have come down because of advances in design and manufacturing. Secondly financing costs have dropped, so high capital costs are less of a problem than they used to be.
The need former transmission infrastructure did not depend on renewables, and was clear before it was decided to install wind turbines. But there are other factors that greatly raised the price of electricity, including the development of gas export facilities in Eastern Australia, resulting in our gas prices getting much higher (to match the international gas prices) which increased the price the gas fired electricity generators were willing to supply power at.
Are you under the impression that the amount the RBA lends out depends on people's savings? That's not the case at all; the RBA has unlimited lending capacity (in Australian dollars) even if there's no savings at all.