but Actually, what you found, is the USE/STORE button, which not only turns ON the 12volt system for lights and fans, but ALSO provides 12v power to the INVERTER, which powers the FRIDGE when you are not running the gen or are plugged into 120v power, otherwise...
so, you have two systems: 12v and 120v
12v is the BATTERIES, providing direct current to lights and fans, etc
120v is from the INVERTER, which yes, does get it's power from the batteries, but then 'inverts' it up to 120v power for the FRIDGE, or maybe also an outlet or two.
When you originally, or accidentally, pushed this button some time ago, you effectively shut DOWN all systems, which is exactly what it's for... it disconnected the 12v fuse box, and also the 12v power going to the Inverter.
(of course, when you use the generator, or shore power, you have 120v power for EVERYTHING, including the air conditioner(s)...the Converter near your Breaker box and Fuse panel provides the 'down' conversion from 120v to 12v for lights and fans - so the batteries get charged, too)
'14 Thor Palazzo 33.3 compact diesel
KingTailgater2 Dish, 100w/5amps roof SOLAR, BlueOx, 100,000+mi since '14... US, Alaska, and Canada... GA, NC, now N AL : )