I was at my coach today to finish hooking up my solar charger. I had chassis battery switch off, house battery switch off, and i also have a disconnect for inverter ground. As i was working by the battery bay I could hear a hum coming from the bay. It almost seemed like it was coming from the box label battery center? I have a trik-l-start between my house and chassis batteries but don't think that should cause anything. Any ideas???
06 Fleetwood Revolution LE