Low Volt Buzzer

[Stephen H]

Why would my buzzer sound for the low battery voltage when I turn on a
few lights around the coach?
Sometimes, I have to go up front and reset the low volts reset on the
dash that controls the fuse panel under the couch. I do not understand
why it would be low.. I have 4 new 6 volt batteries, and the new
battery charger was on! The volts on the dash gauge read over 13, when
I reset the low volt switch.. Coach starts fine, (buzzer does sound
while turning over starter)--but lights were never dim, or low when the
buzzer sounds, and trips the low volts breaker. I had the solon lights
on, the over door, and bedroom lights on (all florescent), then it
buzzed. Does this sound like a problem with my PMMI buzzer? Or Ground?
I know it's not my batteries, or new Progressive Dynamics charger...
Now, I have the Gremlin!!!

Stephen H
81 FC-33SB
Plant City, FL