No power from Batteries

Stephene1219 · 02-28-2022, 06:17 PM

I pulled the Trailmanor out of the garage to do a little interior work and the first thing i noticed is with out the power connected none of the electrical works. I have the trailer plugged in all the time and the batteries are fully charged. The battery monitor say 13.1v and I also check with a meter. . When plugged in everything works fine. It was working off battery when I put it to bed in November.

Any ideas

**Kidkraz** · 02-28-2022, 08:27 PM

Are you talking about overhead lights? Outlets?

Stephene1219 · 03-01-2022, 07:44 AM

Overhead lights, outlets, slide outs, fans, anything that uses 12v.

**Bill** · 03-01-2022, 08:27 AM

Quote:

Originally Posted by Stephene1219

I pulled the Trailmanor out of the garage to do a little interior work and the first thing i noticed is with out the power connected none of the electrical works. I have the trailer plugged in all the time and the batteries are fully charged. The battery monitor say 13.1v and I also check with a meter. . When plugged in everything works fine. It was working off battery when I put it to bed in November.

Any ideas

Do you have multiple batteries? Can you tell us what you have?

What year and model TM do you have? You might add this info to your signature to help us in the future.

If the batteries appear fully charged when power is plugged in, then you are looking at the charger voltage, not the battery voltage. If you unplug power, the charger no longer functions, so you are looking at battery voltage. Unplug power, wait a while, then see what the battery says.

If you left the trailer plugged in all winter, then it is likely that the battery is dry. Take off the caps and see if it needs water. If you top it up, use only distilled water.

If the trailer has been plugged in for a long time, it is quite likely that the battery was overcharged - in which case it was likely ruined. If you top up the water, and leave it charging for a while, and it won't hold a charge, then it is probably damaged beyond recovery.

The outlets don't work on 12 VDC. They work on 120 VAC, so they should work when the trailer is plugged in, but not when the trailer is unplugged. I think this is what you are seeing, so this is normal

Bill

Stephene1219 · 03-01-2022, 08:55 AM

Sorry about not adding more info

1. 12922 - 2022

2. I have two AGM 110Ah deep cycle batteries wired in Parrallel. Batteries were new when installed at the end of Oct. 2021

3. I have 450W of flexible solar panels and a 30 AMP converter. Of course solar is not an issue since the trailer has been inside.

It has only been plugged in since the first of November. I asked the dealer if I should remove the batters and put them on a battery Tender trickle charger and they told me to just plug the trailer in. Maybe I should just remove them and put them on the trickel charger in the house?

The trailer has a built in converter the supposed to automatically switch from 120v to 12v DC when the external power source is disconnected. "This converter automatically switches from 120-volt source to battery when the power cord to the external source is disconnected."

**ShrimpBurrito** · 03-01-2022, 09:24 AM

If everything works while plugged in and the batteries have 13 volts (when not connected to shore power), then that makes me suspect the main fuse. It should be located close to the battery and is likely an inline fuse, which would be in a black holder, either cylindrical holding a glass fuse or rectangular holding an automotive-like fuse. It's probably rated for 30 amps.

I'd check that for sure.

Dave

**Bill** · 03-01-2022, 09:45 AM

Dave -

I agree that checking the main fuse is the first step - easy to do, and may identify the problem. I should have suggested it. But if the battery still registers 13 volts, even though the fuse in the charge line has been blown since November, I'm not sure what is going on. After 4 months of sitting with no charger, I would expect to see some drop.

Or maybe AGMs don't self-discharge in that time frame? Ive never owned one.

Bill

**ShrimpBurrito** · 03-01-2022, 09:52 AM

I've never owned an AGM battery either, but apparently their self discharge rate is typically far less than a flooded battery (a new one only 1-2% PER MONTH vs. up to 1% PER DAY).

https://www.solar-electric.com/learn...tery-faq.html/

Dave

**Bill** · 03-01-2022, 10:35 AM

Dave, you are right. At the moment I made the comment, I assumed she had standard flooded lead-acid batteries. My bad for "assuming".

At any rate, I am anxious to see the final answer to Stephene's question. I hope it is just the fuse.

Bill

**ShrimpBurrito** · 03-01-2022, 11:27 AM

I'm sure the original poster appreciates all the info you provided, Bill, as it is certainly relevant, and who knows, could still point to the crux of the problem!

Dave