Trim Stab
The generators are pretty good on the 200; if everything is working correctly you never get to 50% with normal kit, even with full anti-icing on, so a single generator is enough to supply the load. Obviously if there is a problem with some kit, or extra equipment, and one generator goes offline then that is a different matter.
I have heard of a small number of total electrical failures on King Airs. The only one that the pilot could have done much about was caused by the starters being switched on which stopped them working as generators (for those unfamiliar, the King Air has starter generators). It is thought that sun glare stopped the crew seeing the warnings on the annunciator panel. That was why I asked about the starters, as they might also know that pretty quickly.