Originally Posted by Boxster1971
At 11.4V your batteries are dead. What do you have on when they read 11.4v? You need to get plugged in at least for a full day to get those batteries back to fully charged.
How often have the batteries been run this low. Your batteries may be damaged. You have a new coach that is still under warranty. Might need to get those batteries checked by the dealer.
Some of your electronics might be damaged by the low voltage as well. Some items shut themselves off if the voltage drops too low, but others might not have that low-voltage cutoff. Solar charge controller is one item that does
shut off if the battery voltage drops too low— leading to the catch-22 that if your batteries drop too
low, you have to charge your batteries before the solar panel can charge your batteries!
I don't recall exactly what the cutoff point is for the solar charge controller, but when it happened to me for the first time (back when I was a new owner) that's when I learned that the charge controller is powered by the batteries that are being charged, and not powered by the solar panel itself.
By the way, if your batteries were that
dead, how did you even start your generator? The generator starts from the house batteries, so if they're zombified like that, not enough power to the electric starter. Whatever trick you used, share it with the class in case it happens to us!