I have the basics but I'm confused on a couple points... We have a 2017 Aliner Scout (hard side popup), obviously it has a battery 12v along with normal 30 amp shore power. My questions are: Does plugging in the 30amp cord for the whole camper charge the battery? Does driving with it plugged in to the car charge the battery? How can you tell how much charge is in your battery? It is my understanding that you shouldn't discharge more than 50% of your battery's full charge, is that right? I'm not sure how to know how much charge it has at full capacity. Also are we supposed to be adding water to it?