With electron clouds being a thing now, people can design their ships with either a lot of reactors or capacitors to mitigate the downsides. I would like to see another option.
A backup generator works on sulfur and produces the same energy as a small reactor. It consumes one sulfur every 20 seconds while running, and can't be accessed from every side (ammo factory layout and size). It can hold 4 energy cells.
The backup generator does not shut down automatically. If it is full and it is enabled, it will consume sulfur.
The generator doesn't suffer from electron clouds.
Upon shutting down it will continue running until the one unit of sulfur it is currently consuming is depleted. It features 1 tile of storage + 1sulfur in the generator.
The generator is cheap at 5k credits and doesn't require any rare materials. Itself, it is not explosive, but the sulfur is. It has 5k hp, being a little sturdier than any reactor.