We boondock most of the time with only 2 batteries and no solar. We also have never had any battery monitoring system. We have 2 Honda EU2000i that we run in the morning for a few hours so the wife can have coffee. microwave, and watch the morning news, and then a few hours in the evening to watch TV, top off the batteries.
When we go to bed for the night the idiot lights are always 4 of 4.They are always at 3/4 in the morning, heater or not. If the heater comes on it always drops to 1/2 while it is on. A few minutes after it turns off, it is back at 3/4. And I agree, the idiot lights are just a general indicator but it suffices. I don't really care what the exact voltage is.
I keep looking at solar and inverters, but so far the expense and PITA is not worth it to me as the generators work so well.
Every RV we have had is different as far as power draw. The newer ones have many more parasitic energy devices. We used to be able to go a few days without having to run the generator if we were so inclined. Those days are gone with all the 'advances' in RV life
Yep, we are now spoiled and loving it. And we really don't mind running the generators a little longer if necessary
Scott and Liz - Southern NM
2012 Wildcat Sterling 32RL - w/level up (best option ever)
2007 Chevy 2500HD 4dr short bed Duramax w/allison
Reese Fifth Airborne air ride king pin coupler with Sidewinder