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Old 01-19-2021, 10:12 AM   #1
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Charging Battery

i have a fleewood 5th wheel just wondering if i have to disconnect battery cables before i charge battery
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Old 01-19-2021, 10:18 AM   #2
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I would try and find the manual of your camper or one like it.

In general; Just plug into shore power and your batteries should charge.
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Old 01-19-2021, 10:36 AM   #3
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Good advice above. However, if you insist on using an external charger, it will probably work fine without disconnecting the internal circuits. 12 volt DC power supplies usually work fine together. 120 volt AC power supplies rarely work together.

Note that there is no guarantee that the external charger is designed for long term optimal deep draw battery maintenance. Many automotive chargers are intended for less than 24 hour use.

Most RV's have excellent on-board chargers. They are well regulated. Many of the newer ones will drop output voltage to fully charged batteries to 13.2 volts for long term storage. 13.2 is the best long term float charge for lead acid batteries.

My on-board charger is a low cost WFCO. It lowers float voltage to 13.2 volts after about 4 days of constant very low current. Some more expensive models are programmable. A manual for the charger/converter/inverter may explain how to set it up.

I wish you good luck and happy trails ahead!
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Old 01-19-2021, 03:56 PM   #4
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I've been researching this topic and what I believe I've learned leads me to a couple of comments. I'm no expert on this subject, so someone will probably tell you all this is wrong. This is just how I think about it.

First, you need to know about both chargers (converter and external charger). Are they 3 or 4 stage smart chargers?

Second, while you might be able to connect the charger to the batteries while connected, I personally would not. My smart charger is determining the current level of charge and changes voltage or modes based on that feedback. If there are things drawing the battery down (still connected), then the charger might not be able to process the state of your battery properly. I think it just simplifies things to charge the batteries fully and then either store them or reinstall them.
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Old 01-19-2021, 11:59 PM   #5
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thanks to everyone every little bit helps i'm new to this trailor living sooothanks again
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Old 01-20-2021, 07:15 AM   #6
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Welcome to the forum. Continue to ask questions and you can learn a lot here. This is a great group. They've helped me a lot.
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Old 01-21-2021, 04:07 PM   #7
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In general you do not have to disconnect the battery to charge them. I would suggest to replace your converter with a smart 4 stage converter to help with long term storage and battery life. typical deck mounted 4 stage chargers are right at $100 and can add life expectancy to battery. typical RV have a propane sensor that will drain a battery in a week or two if you don't have shore power connected , you can add a battery disconnect to help prevent this problem also.
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