Date: 11/20/13
Generator: Generac 10KW standby using Natural Gas
Checked the Gen yesterday and noticed the yellow LED warning light was on, I looked at the LCD display panel and it had a message saying "inspect battery".
So I inspected the battery and it looked fine, reset the maintenance reminder and we should be good to go.
How old is the battery ? You may have done this already, but it is possible the control panel is load testing the battery automatically. Either switching in a dedicated test load, or just watching for voltage droop under normal starting conditions.
I don't know those panels specifically, but I'd be surprised if they weren't designed to automatically test, and give you an early heads-up on battery decline.
Rgds, D.