I use a Honda 2000 watt inverter generator to power my trailer when I’m off grid. The generator will power the TV and microwave. It will also charge the battery.
Here is a link
https://www.amazon.com/Honda-120-Vol.../dp/B086Q2V1TN
If you have enough battery power, you can connect an inverter to the batteries. The inverter changes the 12v DC power to 120v AC power, so you can use the inverter to watch TV or other 120v items, depending on how much battery power you have and your inverter size.
Here is a video if you want more information
https://youtu.be/iaQZY_naOdE