Battery - LOW Fault Overload

[rjjmcd1956]

I have a 2024 Flagstaff 25 FKBS and we took my first overnight without electric hookup. All was fine until the sun went down and then I only had power for about an hour. The only things operating were the ceiling exhaust fan, 12 volt refrigerator and the inverter powering a CPAP machine. Inverter panel started beeping and the LOW FAULT OVERLOAD was in red. All started working again as soon as I connected to my truck.

Any help or advice is appreciated

[Reverse_snowbird]

Sounds like your battery was drained by the refrigerator and the cpap machine. The 12v refrigerator and the cpap machine are heavy battery users.

If you're going to do a lot of boondocking, you probably need to upgrade to a LiPo4 battery. You can drain them down overnight. Finding out how much demand per hour they put on the battery will help you choose a battery that will last overnight.

[bikendan]

Originally Posted by rjjmcd1956

I have a 2024 Flagstaff 25 FKBS and we took my first overnight without electric hookup. All was fine until the sun went down and then I only had power for about an hour. The only things operating were the ceiling exhaust fan, 12 volt refrigerator and the inverter powering a CPAP machine. Inverter panel started beeping and the LOW FAULT OVERLOAD was in red. All started working again as soon as I connected to my truck.

Any help or advice is appreciated

Looking at your first post pic, it appears that you only have a single battery, which is probably the typical dealer-installed cheap dual-purpose marine battery. This will in no way, keep up with your 12v demands unless you had the dealer replace it with a LiPo battery.

[Aussieguy]

and if you got a 24v cpap you can possibly use a 12v to 24v adapter that may use less power than connecting a inverter .
look up your cpap manufacturer's specifications for car 12v adapters

unless of course you using the inverter for other appliances

[tomkatb]

Modern rv’s generally will not boondock overnight with the free car battery.

You need to define your travel style and ask for help. Boondock, never boondock, or in between.

Inverters are power hogs. On standby they can discharge a free battery per day. That is just standby!

Cpap’s should not be run off of them. Most cpap’s can utilize a dc plug. Uses about 20% less electricity. Plus they work with power failures that occur in campgrounds. Been in on average one a year. Minutes to three days.

We almost never turn our inverter on.