Something is very strange. Even if the outlet tripped, the battery should have remained at 100% for a long time. So I don't understand why it wouldn't turn on at all. The charge fuse doesn't have anything to do with that part anyway. However, the fuse is in the wiring harness, covered in hard thick heatshrink just above the SBS50 DC output from the charger clipped to the right rear battery inside wall. It's not meant to be serviced or even checked by the owner. This is something that you need to take it to a dealer where they can pull the logs and find out what percent it was parked at on what day and follow the logs to see what happened when, because the bike should have no way to self discharge rapidly like that. Even the BMS goes into hibernation mode so not even milliamps are used anymore. A battery parked at 60%, should have over 50% a year later, although its always good to check.
I'm not sure what happened, but definitely don't worry about trying to check things right now, just take it to the dealer as soon as you can.