The batteries are two years old. When they were new i install a watering system and I have my phone calendar set to remind me to check the water. They have taken one gallon in two years.
I have not tested the batters with Hydrometer. I will check next weekend.
The C-pap runs on the inverter.
Yes I checked my connections first.
This does not happen every night, only once in 11 nights most nights at bedtime i have 100% at 235-amp hours 12.8 volts and morning it is 75% at 176-amp hours 12.5 volts. When the Battery monitor alarms it is 0% o amp hours and 12 volts.
Yes, I am all LED.
I have a never cold refrigerator.
I am in process of installing a power strip. my all off parasitic load reads at 3 amp @ 12 volts.
I have not exercised the Batteries. I will do this!