FWIW, I have multiple digital meters to monitor battery voltage. I also have an older Simpson analog meter that is switched. The Simpson has a five inch meter face and is located so I can see it from the doorway of the trailer. I can tell at a glance from 10' what my battery voltage is. I also have a Victron battery monitor but the face is backlit. I need to read the owner's manual and see if the screen can be set to illuminate 24/7. Otherwise, it's necessary to press a button to scroll through the measurement settings and illuminate the face. Sometimes, technology makes convenience more difficult. :B
