Newbie here. I've never boon-docked before, and was wondering how long I can have the lights on in my TT before the battery gets to a critical level (from what I've read below half way charged is bad...
Your questions are unanswerable because there is no information as to type of battery, its state of charge, and the draw from the devices you wish to power. FYI, your battery also offers power to the fridge in gas mode, the water heater, and also keeps certain alarms and circuit boards powered, continually. A good, temporary solution is to buy another battery and have some way of connecting it to your RV, should you need it.