2020 Keystone Cougar 26RBS. After a 4hr trip home, low voltage prevented the slide from opening. The fridge was running during the trip. Plugged in and opened the slide. The next day I had the battery tested and it's fine. I verified that the truck charges the battery. Yesterday, with battery at 13.6, I unplugged. Fridge was running. This AM, 6.3 volts.What direction do I need to head? Only the fridge and propane detector were running on the battery.

Do you have a 12 volt compressor refrigerator? If so, what is the power consumption vs. the battery specs? Just one battery?

If plugged in and showing 13.6, does not mean battery was fully charged. However if battery showed only 6.3, after just being unplugged overnight, with minimal draw, I'd say you need a new battery.Did a competent person load test your battery, and say it was fine? Unless your battery has been abused, often times allowed to drop to 50% or less, it should have lasted more than two years.A four hour trip should have charged the battery some, but if very low to begin with, not enough to operate the slide on it's own.I'd have it load tested again, as it should not drop to 6.3 overnight. I think you will be needing a new battery.Jerry

Check the DC distribution panel for battery voltage with shore power disconnected and tow vehicle disconnected. Possible that the charge line from TV is not providing power. Possible that battery fuse in distribution panel blown.

An RV battery or batteries drawn down to 6.3 volts is toast. You have an issue, yes, but buy new batteries when solved.

Mr. C wrote:2020 Keystone Cougar 26RBS. After a 4hr trip home, low voltage prevented the slide from opening. The fridge was running during the trip. Plugged in and opened the slide. The next day I had the battery tested and it's fine. I verified that the truck charges the battery. Yesterday, with battery at 13.6, I unplugged. Fridge was running. This AM, 6.3 volts.What direction do I need to head? Only the fridge and propane detector were running on the battery.put your fridge on propane, and get new batteries. if you ran it down to 6V its toast. I am saying to put your fridge onto propane as when I looked up your model it saud propane/electric fridge so I am asuming you have a 2 or 3 way. Steve

Low Battery Voltage | Good Sam Community

32 Replies

MFL
Nomad II
Jun 29, 2022
If plugged in and showing 13.6, does not mean battery was fully charged. However if battery showed only 6.3, after just being unplugged overnight, with minimal draw, I'd say you need a new battery.

Did a competent person load test your battery, and say it was fine? Unless your battery has been abused, often times allowed to drop to 50% or less, it should have lasted more than two years.

A four hour trip should have charged the battery some, but if very low to begin with, not enough to operate the slide on it's own.

I'd have it load tested again, as it should not drop to 6.3 overnight. I think you will be needing a new battery.

Jerry
WayneAt63044
Explorer
Jun 29, 2022
Do you have a 12 volt compressor refrigerator? If so, what is the power consumption vs. the battery specs? Just one battery?

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Low Battery Voltage

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