Gas peaker plants aren't intended to be run 24/7. That's why they're called "peaker plants". Most of the cost is fuel, so they can be profitable if run only dur

Gas peaker plants aren't intended to be run 24/7. That's why they're called "peaker plants". Most of the cost is fuel, so they can be profitable if run only during peak periods. Nuclear plants are all fixed cost. So reducing power produced during off-hours increases cost per KWh.