Mod #99: Smart Charger Charging Posts

Mod #99: Smart Charger Charging Posts

Submitted on: 06/01/11

     Category: electrical
Mod Rating: 12345

(18 ratings)

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Mod Description:

This modification was designed and completed by ModMyRV member ksmith1123. This article carries a copyright. Permission must be obtained from the author before duplication or reposting.

So I finally stopped using my RV inverter/charger to charge my RV batteries. But I hated having to open the battery box(s) every time to get to my two 6V batteries to charge them with the Smart Charger. They are tucked in nice and tight behind the LP tanks and it’s a pain getting the boxes open and straps on/off all the time. And me and electricity don’t seem to play well together anyway, so anything that reducing the chances of me ZAPPING myself (again) appeals greatly to me!

Mod Difficulty:

Not even sure where I first read about these remote charging studs but they are just what I needed! Gave me an excuse to clean up the old install by putting both batteries in the same box (double wide) and really making it VERY easy to charge them using the Smart Charger running off my generator.

The first picture is the ugly old install showing both batteries in their own box and the battery cutoff switch mounted in the lid of one box. (Eeesh… what was I thinking when I cobbled THAT mess together?!?!) Next is the new install. (My wife says there is much less “visual noise” now…). The next one is the right side of the box showing the red charging stud and the battery cutoff switch, capped with a crutch tip to keep out water. The next two are the left side showing the black stud both capped and uncapped. And finally, the last is the box closed with the two studs just visible on each end. This is the charging configuration. Pop off the red and black rubber caps, clamp on the corresponding red and black leads from the Smart Charger, plug it in and they’re charging!

If you are wondering why I didn’t mount both studs on the same side of the box for convenience purposes, I direct you back to the comment above about me ZAPPING myself. I figured if they were on opposite ends of the box about 2.5 feet from each other I’d have to try real hard to create any unwanted sparks!

The whole thing cost about $100 for the new box, a couple shorter battery cables and the charging studs. It took about three hours to do. Happy modding!

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9 Comments For This Mod

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  1. Greg Domeier

    SAW YOU POST AND THINK ITS A GOOD IDEA. I;M NOT SURE WHAT YOU MEAN WHEN YOU SAID YOU STOPPED USING YOUR INVERTER/CHARGER TO CHARGE YOUR BATTERIES. I HAVE A 5TH WHEEL TRAILER AND NO ON BOARD GENERATOR. ARE YOU SUGGESTING I USE A SMART CHARGER AND MY 2K HONDA GENERATOR TO CHARGE MY BATTERIES INSTEAD OF THE BUILT IN CHARGER?

  2. Rick Irwin

    Very clean work.
    I have a similar comment to Greg’s. I installed a 2nd Group 24 battery (12v)for the additional amp hours since most of my use is “dry” camping. However, when the trailer is plugged into shore power, running off the generator, or the tow vehicle. my charge level indicator in the trailer never goes past a 3/4 charge. If I hook a separate car type charger direcly to the batteries it will get to full charge. I believe I have wired it correclty to the trailers system by connecting the positive lead and the negetive lead each to a different battery. I’m thinking that since there are 2 batteries the trailer’s charging system is shutting off too soon. But the voltage should be the same.

    How can I get my trailer charging system to bring both batteries to a full charge?

    Thanks for your help.

  3. Kevin

    Rick and Greg,

    Many RV’s come with an inverter that also doubles as a battery charger. However, many of them do a poor job and seemingly take forever. There is lots of information on this forum about replacing/upgrading your inverter/charger that does a much better job than I can of explaining the battery-charging limitations of some lower-cost inverters. Read Mods #4 and #8 for more info. I’m not a great electrician so pulling the old inverter out and putting in a new one wasn’t something I was comfortable doing so I went this way instead…

  4. Kevin

    Greg,

    I am using my Honda 2000 and my SmartCharger to charge my batteries. If your on-board inverter/charger already has the upgraded charging section as described in mods #4 and #8, then you don’t need to do this mod, you can just use your on-board charger.

  5. Matt

    Where did you get the battery box?

  6. Kevin

    Matt, I think this is it…

    http://www.allbatterysalesandservice.com/browse.cfm/4,576.html

  7. tvman44

    Where did you get the charging studs??

  8. Sonof AZ

    Getting ready to do this to my New TT and I was wondering what was used as backing for the remote posts?

  9. Mike

    Did you mean to say “converter charger” instead of “inverter charger”? Most if not all inverter chargers have multi step and often adjustable chargers with them.

    Many of the old converters do not have multi step chargers though the most recent ones often do. Even then some of them do not ever get off the first step due to poor design.

    Mike

1 Trackbacks For This Post

  1. Remote battery posts - Hi-Lo camper travel trailer forum

    [...] on the outside of the battery compartment. I haven’t done it yet, but it looks like a simple job. Mod #99: Smart Charger Charging Posts | ModMyRV __________________ Great Wife, Joyce 2010 2310H Hi-Lo 2012 F150 4X4 SuperCrew EcoBoost w/Leer [...]

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