Point is it's a hybrid market, not 0 or 100% free market
Now Demand Response: you should investigate @PooledEnergy …they have the right idea. Even then though it is only one limited part of a bigger solution. 3/
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Note these curves are not one-to-one aligned, each is reordered in descending value. If I keep total & residual data together all you see is the stochastic nature of renewables. Not that useful. 6/6