Battery Life in Hours

jpjulian wrote:
Our new Mobile Suites came equipped with two 6 volt batteries and a 1000 watt inverter.

Looking at a brochure, it appears that 5er has at least a 22 cu ft side by side refrigerator with bottom freezer. Very nice but those can draw up to 20A !

I also noticed that the manufacturer offer an upgrade inverter with 4 batteries ! I hope you won big at the casino because you will be spend your winnings on this upgrade !

2 things to check.

When were the batteries last "fully" charged and by what means ? How do you know they were fully charged ?

Second, a 1000W inverter could, in theory, draw over 80 amps ! Highly unlikely if the refrigerator was the only thing running. What are the specs for current draw from the refrigerator ? An "average" 18 cu ft residential refrigerator drams about 6-8A @120VAC or roughly 700-800 watts, when it is running. It really depends how many minutes per hour it runs. If you shop around, there are some refrigerators that take less.

You really should invest in a AC-DC clamp on ammeter. There are many out there to choose from that are less than $100. I have this one this one.

It is a residential fridge. No propane option.

Joe

Check the draw on that fridge and do the math.
Switch it to propane unless hooked up or on solar.

Battery life is measured in cycles and depth of discharge. Ah, the joys of a residential fridge! What is your residential fridge amp draw? What is the capacity of the batteries? What was the state of charge when you went to bed?