RV Systems Monitor Panel... How do I read the lights?
Some RVers are confused about how to read the holding tank levels because the black water and gray water tanks have red lights at the top of the scale while the fresh water tank has the green light at the top.
It's easy to understand if you think about the ideal condition of each tank. For example the ideal condition of the fresh water tank is full.
The ideal condition for the black and gray tanks is empty. (When either tank gets full you better be looking for a dump station!)
Now think of GREEN lights as being good and RED lights as bad. If you have a full fresh water tank that's good so you have a green light. If you have a full black water tank that's bad so you have a red light! Amber means caution you're about to have a bad condition.
Same goes for propane tanks. A full tank is good so it's a green light.
One last thing, I'm not sure all monitor panels work the same but when I'm hooked up to shore-power the battery level indicator reads the voltage from the power converter/ battery charger. I learned this the hard way after a long stay when I disconnect from 120v power to find my battery dead!
To get a true reading of my battery condition the converter may have to be turned off. You may want to check how yours works.