TV backer in RV refers to the frame or support structure that is installed behind a television set in an RV. This helps to secure and protect the TV set, as well as provide stability and prevent it from being damaged during travel. There are various types of TV backers available on the market, so it is important to choose one that is compatible with your particular RV model. installing a TV backer may require some minor drilling and modification to your RV, so it is always best to consult with an experienced RV technician before proceeding.