Some battery charge controllers check to see if there is a voltage on the 12Volt side. If the voltage is not there then it will not supply 12 volts/charge. I would wait until you get the battery for the TT and then make the decision as to if you need a new converter. Can you give us the make and model of your TT's controller and we can see what it designed to do?
An inverter converts 12VDC to 110VAC.
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
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