But there is plenty of peak capacity. Plenty of plant that currently runs more or less in baseload mode burning fossil fuels. Increased intermittent capacity, whether wind or solar, obviously has to take priority because, as you note, the fuel is free.

All that is required is to lower the average load factor of the fossil fuel plants, i.e. burn less fossil fuels in order to burn more solar and wind. Financial compensations are no doubt needed to those plants, to cover the sunk capital costs.

_{It is rightly acknowledged that people of faith have no monopoly of virtue - Queen Elizabeth II}