What is a monitor system? How does that work?

Most new travel trailers and fifth wheels are equipped with a monitor system.  This monitor system indicates your battery power level and the levels of fluid in all of your tanks.  Not sure how full your black/sewer tank is?  No need to wait until sewer is backing up into your camper just push a button and check. There are a number of buttons on these monitoring systems.  Typical buttons are as follows: Battery Indicator The battery indicator shows you the level of the power or charge in your battery. 4 LED lights=charging or fully charged 3 LED lights=good 2 LED lights=fair 1 LED light = low This is a battery…