Disconnects?

[Cate&Rob]

LeonM

I think your battery may be "suspect". If you can get it load tested, that would be ideal. A way to do this yourself is to measure the voltage drop when a heavy load is applied. Put your voltmeter across the battery terminals and watch what the battery voltage does when a slide motor is engaged. If the voltage drops below about 10V . . . you have a weak battery.

Rob

[howson]

LeonM

I think your battery may be "suspect. If you can get it load tested, that would be ideal. A way to do this yourself is to measure the voltage drop when a heavy load is applied. Put your voltmeter across the battery terminals and watch what the battery voltage does when a slide motor is engaged. If the voltage drops below about 10V . . . you have a weak battery.

Rob

Exactly what I was thinking, Rob.

[Scott'n'Wendy]

You may have hooked it up backwards, which blew the polarity fuses, so no 12vdc power.

It's not hard to do. Everyone I know with an RV has done it. Including an electrical engineer I know.

My nephews trailer didn't have reverse polarity fuses. I had to replace fuses in almost evey piece of equipment in that trailer

[guest2]

You may have hooked it up backwards, which blew the polarity fuses, so no 12vdc power.

It's not hard to do. Everyone I know with an RV has done it. Including an electrical engineer I know.

My nephews trailer didn't have reverse polarity fuses. I had to replace fuses in almost evey piece of equipment in that trailer

I’ve never hooked up a battery backwards. That’s automotive technician 101.
Rich

[guest2]

If the OP’s battery has both eyelet and standard posts, maybe replacing the wiring eyelets with regular post ends would help. The posts are different sizes so shouldn’t reverse install accidentally.
Rich

[LeonM]

LeonM

I think your battery may be "suspect". If you can get it load tested, that would be ideal. A way to do this yourself is to measure the voltage drop when a heavy load is applied. Put your voltmeter across the battery terminals and watch what the battery voltage does when a slide motor is engaged. If the voltage drops below about 10V . . . you have a weak battery.

Rob

I took battery back to trailer, and double checked disconnect key. It was on, so I turned it off, removed, and back on, and panel worked. As for the battery, I tried opening a slide, and it dipped down to 11v, then rebounded back to 12.4.

[Scott'n'Wendy]

I’ve never hooked up a battery backwards. That’s automotive technician 101.
Rich

Automotive sure...but not RV. Negative can be black, white, or red. In my trailer's I've had all three. In my last trailer the battery wires were both red.
Use your automotive 101 everywhere in an RV and you will connect something backwards.

[Cate&Rob]

I took battery back to trailer, and double checked disconnect key. It was on, so I turned it off, removed, and back on, and panel worked. As for the battery, I tried opening a slide, and it dipped down to 11v, then rebounded back to 12.4.

The battery dropped to 11V (which is good) . . . but, the slide didn’t move?

Rob

[guest2]

Automotive sure...but not RV. Negative can be black, white, or red. In my trailer's I've had all three. In my last trailer the battery wires were both red.
Use your automotive 101 everywhere in an RV and you will connect something backwards.

Only if you don’t know what you’re doing. My automotive knowledge (German) has served me well with the 6 RVs I’ve owned in the past 30 years. I’m not just talking about wire colors (German vehicles use non standard colors also). Knowledge of how mechanical and electrical devices operate in general is key.
Rich

[guest2]

I took battery back to trailer, and double checked disconnect key. It was on, so I turned it off, removed, and back on, and panel worked. As for the battery, I tried opening a slide, and it dipped down to 11v, then rebounded back to 12.4.

Defective switch possibly? Or maybe it did a hard reboot?
Rich

[Kathy&Jim_Imagine]

OK... I thought that you do not want to disconnect the battery before disconnecting the solar as the MPPT controller could get damaged. That said, I turn off my solar first then the batteries.When re-energizing, batteries first then solar.

[Popga]

You may have hooked it up backwards, which blew the polarity fuses, so no 12vdc power.

It's not hard to do. Everyone I know with an RV has done it. Including an electrical engineer I know.

My nephews trailer didn't have reverse polarity fuses. I had to replace fuses in almost evey piece of equipment in that trailer

Can you give some more information on the reverse polarity fuses? I'm not sure if I have them, or, if I don't, where I should put them. I am DC challenged when it comes to crossing wires...
Erik

[ncitro]

Can you give some more information on the reverse polarity fuses? I'm not sure if I have them, or, if I don't, where I should put them. I am DC challenged when it comes to crossing wires...
Erik

Your parts lookup shows (always subject to changes on the assembly line) a deck mount converter. It should be located behind the false wall in the pass through storage, and there should be two fuses directly on it. Also there are sometimes two main fuses in the fuse panel towards the bottom.

[Scott'n'Wendy]

If you have them they are mounted directly on the power converter. If you have a stand alone converter there will be two of them side by side on one end of your converter. The ones I have replaced are on other peoples trailers have been 30A.
They are not something you add, they are part of your converter.
Here is a short video showing where they are with an integrated WFCO converter if you have one of those.
https://www.youtube.com/watch?v=M2rNiiF_aSM

And in this link you will see a picture of the converter I have.
https://powermaxconverters.com/produ...ithium-series/
If you look at the end you see two red fuses. They are the reverse polarity fuses.

Hope this helps


Whoops...Neil posted while I was typing...

[Popga]

ncitro
Scott'n'Wendy

Thank you both for the quick response. My converter is deck mounted in the space directly behind my main panel. I replaced it when I got LIFPo batteries and can't recall which I got. I'll open up the area and have a look.
The videos are very helpful.
Thanks,
Erik