Who has a good solution to 33rl 5th wheel living room TV

Assuming your TV is 120 volt, which most are, what you need is called an "inverter". It steps 12 volt battery power up to 120 volts. If you just want to run the TV, get yourself a good quality 300 to 350 watt Pure Sine Wave inverter. Lots of ways to wire them in. A good RV tech can do it if you're not handy with these things.