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Old 02-22-2018, 01:16 PM   #1
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Battery Draining

Okay, I have my first problem. I went into my camper and went to turn on the interior lights, nada, nothing worked! So I decided to take a volt reading on the battery and the battery read 2.4 volts. From what the PO said this battery was purchased last year, so it's only a year old and when I first saw this camper last Saturday everything that was on 12 volt worked. At this point I ran electric to my new used camper and everything worked but I heard a fan running. I traced the fan to to where it is built into the circuit panel. Is there something that needs to be disconnected when the camper is not in use or turned off? And, why is this fan running?
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Also, there is a 12 volt TV outlet. How do you connect to this?
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Old 02-22-2018, 01:22 PM   #2
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Parasitic draw will discharge a battery in just a few days. Most install a battery disconnect to keep this from happening.

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Old 02-22-2018, 01:30 PM   #3
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As posted above a trailer sitting for a few days will drain a battery. The CO and propane alarms are the biggest culprits but the fridge and stereo will also drain a bit. Your best bet is to completely disconnect the battery if you are away from the trailer for a few days or longer.

The fan you heard is normal. That is your converter and it was probably dumping a lot of current back into your battery to charge it back up. The converter generates heats when it is working hard and turns the fan on. The fan probably won't run much if your battery is fully charged and you don't have a lot of appliances or lights on.

The TV plug is just a 12 volt cigarette lighter plug just like in your car. You would need a specific TV that runs on 12 volts to use that outlet. We use ours for charging phones usually.

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Old 02-22-2018, 01:32 PM   #4
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Fans probably running to keep it cool from trying to recharge your dead battery. I would remove the battery and try to charge it on a conventional battery charger.

The 12v outlet is for a cigarette style plug that some 12v TVs can use. I use it to power a small 12v to 110v invertor to power my TV while dry camping.
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Old 02-22-2018, 01:33 PM   #5
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Old 02-22-2018, 01:39 PM   #6
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Quote:
Originally Posted by WVDusty View Post
Parasitic draw will discharge a battery in just a few days. Most install a battery disconnect to keep this from happening.

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Here are some popular battery disconnects;

https://www.amazon.com/s/?ie=UTF8&ke...aenok8hj_e_p20
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Old 02-22-2018, 01:51 PM   #7
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Wow! I count 13 compression water connections directly behind the converter/power panel. Can you imagine that in home construction?

Another tip to reduce battery drain is to turn off the amplifier for the antenna when not in use. That's the little button below the 12V outlet.

We keep a double USB plug in our 12V outlet for charging phones while boondocking.

Note that if you don't want to/don't have time to install a cutoff, just leave your shore power plugged in, or use a battery tender. I have a small solar panel that I stick up on the roof in the storage yard to keep the battery topped off rather than disconnecting it.
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Old 02-22-2018, 02:05 PM   #8
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I disconnect mine for the winter and keep it on a trickle charger.
Be sure not to let it drain completely too often as it shortens the life of the battery.
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Old 02-22-2018, 03:27 PM   #9
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Pull the Main inline fuse that is by the battery box, this will disconnect the TT from the battery. Your battery, totally charged before disconnecting the fuse and assuming that it is not toast after discharging so low, will last months without needing to be charged.

Check your batteries water level now that you have it charged up again. Check its voltage level, pull the fuse, and check it the next day. It should be between 12.6 and 12.8 volts, if it goes below 12.6 your battery more than likely has a bad cell.

If the TT is less than a year old there is a battery warranty yet.

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Old 02-22-2018, 07:10 PM   #10
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I too had a low battery on our 1st TT when it was new and sat a few days. JOF clued me in. (Sound familiar?)
I started pulling the 30A fuse near the battery when it was stored (solved the problem) until several batteries went missing in the storage lot. I got some wing nuts from HD for the battery terminals and started taking it home with me. It’s a pain to lug it around but better than buying a new one. I do the same with the 5th and don’t lock the batt compartment in case someone wants to take it, hoping to avoid damage.
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