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Old 08-17-2018, 06:07 PM   #1
Loneoak
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Battery keeps dying

We boondock occasionally, usually for one night and then we hit the road. We know that the RV battery can power the unit all night, even running the furnace.

So imagine our surprise when all of a sudden the battery starts to run out of juice after only a couple of hours, and we are not running very much! The propane fridge takes a bit of juice, but other than that and running the water pump a few times, we should have power all night.

We took the battery in for testing and even bought a new one while the testing was going on. The battery test showed the battery was good, and the new one started dying too!

There must be something causing this. Any ideas?

We have not yet decided on what to sign up for at the rally for technical issues. This might end up being one of them.
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Old 08-17-2018, 07:37 PM   #2
DQDick
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When you are plugged in, do you have the battery disconnect on? Also you need to check and make sure your truck is sending power to the rig when going down the road.
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Old 08-17-2018, 07:42 PM   #3
AZ Traveler
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What size, make and number of batteries do you have in your rig? A single small battery will not last long.
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Old 08-17-2018, 09:19 PM   #4
1retired06
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We have gone 3 -4 days on battery (single) being conservative on power usage and the battery did fine. If charging is good I would look for a power drain somewhere.
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Old 08-18-2018, 04:35 AM   #5
jeffba
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These measurements can be taken from your Leveler touchpad

What is your battery voltage NOT hooked up to shore power and battery disconnect in convenience
center OFF?
What is your battery voltage NOT hooked up to shore power and battery disconnect in convenience center ON?


What is your battery voltage with shore power connected?.


What is your battery voltage hooked up to truck and truck running?
With battery disconnect on?
With battery disconnect off?


If you have a clamp on amp meter.

In your boondock setup.

current draw with battery disconnect in convenience center OFF?
current draw with battery disconnect in convenience center ON?
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Old 08-18-2018, 05:25 AM   #6
Loneoak
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I will ask DH about the battery disconnect thing, although I doubt that is the problem. If he plugs into the truck and runs the truck, the battery charges. It just discharges very quickly. We are currently dry camped at a music festival.


I will see if I can get a voltage meter at the hardware store today.
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Old 08-18-2018, 09:33 AM   #7
Lenny K
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Sounds like to me the battery is not getting fully charged and therefore as soon as a load is applied it quickly discharges. A battery to get fully charged by your truck would take about 20 hours. Hopefully it is as simple as the disconnect switch in the off position. If not, it points at the converter not doing its job of sending voltage to the battery. To determine if that is the problem do the checks as suggested by jeffba.
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Old 08-18-2018, 10:22 AM   #8
Lenny K
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Because you are dry camping it will not be possible to see if your converter is working. Also once your battery is run down when dry camping you will never get it charged back up unless you use a generator which in about 4 hours will take the battery up to 80% charged. To fully charge it would take around another 8 hours and that is not practical when using a generator.
People that dry camp never get their batteries past 80% charged unless they have a large solar system. However for longevity of your batteries you need to get them fully charged at least weekly.
Hopefully this will help you.
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