How to run the trailer off the battery?
Think of that battery charge as a bucket of water. Once it is gone, it is gone. Time to refill/charge. The rated amp hours of the battery is the size of your bucket.
Simply put it takes some understanding of what uses how much power. Turn lights on as needed. Don't leave the sound system on for hours. If you have an inverter heat produceing things like coffeemakers will kill the average minimum sized battery in no time.
For dry camping the size of the battery bank & available water capacity is king.
