Just keep in mind the OTA TV PANEL 12VDC outlet does not support very many AMPS. If you overload this outlet it will blow an internal fuse in the panel and you will lose you OTA Antenna operation capability.
It is better to wire your 150WATT to 300WATT PSW small 12VDC Inverter directly to your battery terminals using the proper size protection fuse. Then plug your 120VAC Home entertainment units into the Inverter 120VAC OUTLETS to use.
We use a 600WATT PSW Inverter to run these type of items when we are camping off the power grid. You will like us most likely want to run a few other items when camping off the power grid... I started out with a 150WATT Inverter then went to a 400WATT and finally ended up with a 600WATT unit. We normally use around 300WATTS for our toys each day/night camping run off the batteries. We also use a PURE SINE WAVE type Inverter to run our Home entertainment electronics items.
Of course the more you need the bigger the battery bank... Our battery bank is a 255AH setup.
Roy Ken