There are no 24V items in a camper. The outlets are only 110V and only when plugged in to shore power (110v AC source). The lights in your popup are 12V. So is the water pump. There is a converter that converts 110VAC to 12VDC to operate the lights and charge the battery.
With more information we can go further.
BTW you might check the frame. Sometimes the VIN can be found stamped on it somewhere.
Chuck - Sparta, TN
2012 Jay Flight 22FB, 2 x Honda EU2000i
2013 GMC Yukon XL Denali AWD
EDUCATION is what you get when you read the fine print.....
EXPERIENCE is what you get when you don't.