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Originally Posted by P-hack
But it isn't anywhere what it needs to be to replace the current transportation/heating/industry demands, and it would be very very very costly to do that.
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Isn't that what I said? That the problem is not with 'renewables', particularly solar, being viable (that is, if you install PV on your roof, over the expected life of the panels you will pay less than if you bought from the grid). The problem is that society in its current form is unsustainable, whether you run it on renewables, coal, nuclear, or magic.
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Also "grid parity" is a strange metric, are you going to replace farmland with solar panels during the buildout to meet the energy demands?
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No, not if you're sensible. (And of course not everyone is: see above.) You are going to put those panels on your roof. As for industry... Well, note that Tesla claims that its 'Gigafactory' battery plant will produce more energy than it consumes from solar, wind, and geothermal.