Larger stations could take a long time (like a day) to start up, as there are trade-offs between start up time and operating efficiency. During that time, you s

Larger stations could take a long time (like a day) to start up, as there are trade-offs between start up time and operating efficiency. During that time, you still have to be able to run all the plant equipment - pumps, fans, coal grinders, conveyors, all the monitoring and control equipment. I expect there will be many stations that don't have anywhere near sufficient diesel generator capacity to allow start up without any supply from the grid.