Welcome to the forum. You came to the right place for information and hopefully give some back. The 38FLSA is what DW and I want next, just need to upgrade the TV first.
Not knowing anything else about your needs, I would go with at least 4 Trojan T-105 (6 Volt) batteries.
If you like to dry camp, I would recommend going with 6 T-105 batteries. Which ever way you go just make sure that all the batteries manufacture dates are the same or within a month.
You will probably want to replace the wire from the TV to the TT with a larger gauge wire, it increase the amps coming from the TV.
Just remember you will need a way to keep them charged. Keep us informed with your decision.
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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