as was said, all RV's come with converters that also recharge the battery, along with converting 110v AC to 12v DC.
suggest you post any questions specific to your popup, in the Tent Camper/Popup section here at FRF. also do some reading there to gather some info on yours.
lots of helpful FR popup owners there.
and Zoe the Wonder Dog(R.I.P.)
'07 Roo 23SS pushing an '07 Chevy Avalanche
Equalizer WDH and Prodigy BC