What the heck just happened?

2007 honda silver wing fsc600abs 73,000 miles riding home from work stopped at a traffic light sitting there the bike coughed then backfired and quit tried to restart and could not the battery was dead got a jump and had to keep the engine rpm up to get home got home tested the battery and had only 9 volts system not charging i work 7 days a week and right now 10 hr days i don't have the time or energy to do a diagnostics on the unit i added a second battery and keep them charged it gets me to work and home every day has any one had to do work on the charging system i am looking for a hopefully quick fix before i spend time to figure it out
Thankful for any help

Stator

Welcome to the forum! great introductory post. Yet another of the the 'I have a problem' brigade.

This topic may help:
https://www.silverwing600.com/t5279-sudden-electrical-failure?highlight=electric+failure