IF your trailer runs on 110VAC then you do have a converter for the 12VDC circuits, but it may not be one that charges your battery (may only supply 12VDC to run your things). See if you can locate the mfr/model of the converter and check the specifications.
I do not think that Jayco would install a converter only, but check anyway.
2013 Jayco Eagle 284BHS
250Watt Grape Solar Panel, MorningStar MPPT 60 Charge Controller
1500 Watt Ramsond PSI, 2 Trojan T145 Batteries (260Ah)
2 - AirSight Wireless IP Cameras (used as rear view cameras)
EnGenius WI-FI extender, D-Link wireless (n) modem
MagicJack Internet Phone
2012 Ford F150XLT, EcoBoost w/3.73
157" Wheel base, HD Towing Package
Our Solar Album http://www.jaycoowners.com/album.php?albumid=329