Increasing reliance on solar and wind-generated electricity will mean the costly trashing of coal-fired generators, since the latter operate at peak efficiency when producing electricity at full speed over long uninterrupted durations.
By contrast, electricity input from wind and solar “farms” fluctuates, sometimes wildly and unpredictably, with the variations in wind speed and sunlight intensity. This means that base-load coal-fired units must be constantly idled-down or revved…
