Power distribution window
Steam backup of 160 steam engines and 80 boilers
Power line layout for steam engines with main disconnect switch below
Emergency power to coal mine in case of total blackout due to lack of resources
Even when causing an intentional blackout, it shows those 3 engines still supplying power. I also tried disabling mods and loading the save. The base still functions as normal and the error still shows. The alarm appearing on vanilla load is due to modded miners being absent.