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My benchmark for utility scale solar is the installation in Australia that was 100MW and 129MWH and cost about 100 million

So making $40/MWH * 100 MWH/day = $4000 per day * 365 day/yr = 1.4 million revenue per year. Not enough to pay back $100 million.

Like you said The economics of it keep improving though Imp

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I think that thing makes money because utilities will pay though the nose for a reserve of instant on demand power.

Right, so then we are back to that cost being recovered from ratepayers.

But they're paying less for that than before. The price power commands depends a lot on how flexible the power source is. Batteries because they provide grid stabilization can charge a premium price.

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