Battery disconnect - Fiberglass RV


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 08-15-2018, 12:42 AM   #1
Junior Member
 
Name: David
Trailer: Casita
BC
Posts: 3
Battery disconnect

Hi, I am D-Robbie. I have a new 17 ft Casita Freedom Deluxe. As I have had problems with my battery running down while not in use I want to install a disconnect switch. Not much room in battery cubicle. Any good ideas?
__________________

D-Robbie is offline   Reply With Quote
Old 08-15-2018, 01:01 AM   #2
Senior Member
 
Borrego Dave's Avatar
 
Name: Dave
Trailer: Casita SD17 2006
California
Posts: 3,503
Welcome to FGRV David. I added a battery disconnect from Little House Customs. It's the plug version without the key they carry and is all in the battery box. You're probably draining the battery from the CO monitor as it's hard wired and always drawing power. Way easier than pulling the battery out enough to remove a cable too .
__________________

Borrego Dave is offline   Reply With Quote
Old 08-15-2018, 01:07 AM   #3
Junior Member
 
Name: David
Trailer: Casita
BC
Posts: 3
Yes, and a small solar trickle charger cannot keep up. The only space in the box for the switch is between the battery and the cubicle door.
Thanks for your comment.
D-Robbie is offline   Reply With Quote
Old 08-15-2018, 01:11 AM   #4
Senior Member
 
John in Santa Cruz's Avatar
 
Name: John
Trailer: 2014 Escape 21, 2002 Ford F250 7.3 Diesel 4x4
California
Posts: 1,220
Registry
if you dig into the right (street side) rear bench, you'll find the other side of the battery box, and on the side of it is a automatic 30A circuit breaker, the battery is connected to this, and the other side of the breaker goes to the power converter thats under the side dinette bench. (at least thats where these are on my Casita 16, I assume a 17 is similar).

I would mount a disconnect switch on the side of the bench, under the rear bed, disconnect the big heavy black wire that goes from that circuit breaker to the power module, and instead connect it to one side of a battery disconnect switch, then run a new 10 ga. black wire from the other side of the disconnect switch back to that circuit breaker where you lifted the other wire off..

https://www.campingworld.com/single-...connect-switch
https://www.amazon.com/BATTERY-CUTOF.../dp/B003BQLZ36
https://www.amazon.com/dp/B07413JWLD

etc etc. I don't like the ones with removable keys as thats just something else to get lost.
John in Santa Cruz is offline   Reply With Quote
Old 08-15-2018, 01:12 AM   #5
Senior Member
 
John in Santa Cruz's Avatar
 
Name: John
Trailer: 2014 Escape 21, 2002 Ford F250 7.3 Diesel 4x4
California
Posts: 1,220
Registry
a 10W solar battery tender should be fine for keeping the battery fully charged if its already charged when you park.

me, I just leave my trailer plugged into an extension cord.
John in Santa Cruz is offline   Reply With Quote
Old 08-15-2018, 02:15 AM   #6
Senior Member
 
Borrego Dave's Avatar
 
Name: Dave
Trailer: Casita SD17 2006
California
Posts: 3,503
Quote:
Originally Posted by D-Robbie View Post
Yes, and a small solar trickle charger cannot keep up. The only space in the box for the switch is between the battery and the cubicle door.
Thanks for your comment.
Exactly why I went with the plug and not the swt.
Borrego Dave is offline   Reply With Quote
Old 08-15-2018, 06:29 AM   #7
Senior Member
 
ShelbyM's Avatar
 
Name: Shelby
Trailer: Casita SD
Tennessee
Posts: 275
Until you get your battery switch you can pull the fuse for the propane alarm.
ShelbyM is offline   Reply With Quote
Old 08-15-2018, 09:49 AM   #8
Senior Member
 
Name: Terry
Trailer: 1996 Casita Freedom Deluxe 17 ft
Colorado
Posts: 403
Auto batteries put out a lot of current when they are starting the car. But our trailers never have huge loads, especially with LED lights. Probably the most amps are when the TV is charging the battery during a trip. I bought a 25 amp toggle switch from an auto parts store, extended wires from the positive battery lead, and mounted it on the partition next to the bed. That way it's easy to use and away from the nasty battery gases. You can also add voltage and current meters like I did if you want to get fancy.
Terry G is offline   Reply With Quote
Old 08-15-2018, 10:53 AM   #9
Senior Member
 
Name: Gordon
Trailer: 2015 Scamp (16 Std Layout 4) with '15 Toyota Sienna LE Tug
North Carolina
Posts: 2,919
If you only want to know where to mount the switch I can’t help much. I do like the idea of the switch in the camper instead of outside where it is subject to corrosion, weather and vandals. I also suggest that it be easy to reach (but not where children will switch the battery off without you knowing it). Yesterday I moved my switch from under the bench hatch to inside the “Porta-potty” storage area because it was often a pain for me to move things around, lift the cushions and access the hatch. Now I can open one door and use the switch.

More notes that you probably already know about:

Check your converter manual to ensure the system will function properly without a battery attached to it. Some converter designs require the battery to be attached.

Positive or negative side? There is much debate and it usually makes little difference in a small RV. But if things are wired straight to the battery on the positive side, and they use a common or frame ground elsewhere (not at the battery), and if you want these things off when the switch is off, then the ground side makes sense. I wont debate this anymore since like I said, in a small camper it usually is OK either way.

But if you do use the negative / ground side and use a shunt for monitoring the battery, then it should be on the load side of the shunt so that the battery monitor can continue to monitor the battery when the switch and loads are off. The battery monitor does still use a few milliamps, and of course the battery will self-discharge, so you still need to charge it occasional and/or use a battery tender type of maintenance charger.

Also consider solar if you have it, or might get it in the future. I would (and did) wire it so that, when the switch is off, it still allows the battery to be charged. In other words the switch disconnects the loads but not the solar charger. The charger is connected at the load side of the shunt, but before the switch, so that the TriMetric can record the solar charging current.

Are there any other things that should still be powered when the switch is off? Obviously, a break-away switch for example should not be wired upstream of the switch (and should be wired straight to the battery).

Kudos for your decision to add the switch. It not only helps to manage your power use, and extend the life of the battery, it is also a good safety device.

This is what I ended up with, using the ground side to disconnect the trailer's 12 loads (the same polarity one should disconnect first when disconnecting the battery at the battery posts). All trailer loads run off the buss bars.
Attached Thumbnails
BatSwitchRevised.jpg  
gordon2 is online now   Reply With Quote
Old 08-15-2018, 11:00 AM   #10
Senior Member
 
Name: Greg
Trailer: 2008 Casita 17 SD
Washington
Posts: 1,262
Registry
Just run out to your local NAPA or AutoZone parts house and get yourself a battery cut-off switch. Easy enough to mount it on a chunk of 1/8" flat bar bent into an "L". Drill a few mounting holes for the switch and the wingnut and you're good to go. And I never remove the "key" handle because there's no real need to do so. Just leave it in where it belongs.
Attached Thumbnails
BatteryCutoffSwitch.jpg  
Casita Greg is offline   Reply With Quote
Old 08-15-2018, 12:12 PM   #11
Junior Member
 
Name: David
Trailer: Casita
BC
Posts: 3
Battery disconnect

Looks like a plan! Thanks.
D-Robbie is offline   Reply With Quote
Old 08-15-2018, 03:52 PM   #12
Senior Member
 
Name: Alan
Trailer: 2000 17' Casita Freedom Deluxe...Tow vehicle 2015 Toyota Tacoma Dble Cab V6 Prerunner
California
Posts: 1,013
I agree w/casitas Gregg
I did exactly the same installation... very easy
alan H is online now   Reply With Quote
Old 08-15-2018, 04:15 PM   #13
Senior Member
 
Byron Kinnaman's Avatar
 
Name: Byron
Trailer: 2006 Scamp 13' towed with a 2005 Dodge Dakota 4.7l Magnum W/full tow package (over kill)
Oregon
Posts: 6,721
Registry
A couple of easy solutions to battery depletion when not in use. If you can plug in the trailer and let the converter keep the battery charged. If you can't do that the best thing is to remove the battery and connect to a Battery Minder, Battery Keeper, or so other like device.

One of the problems with flooded cell batteries is that they will self discharge. Even with a cut off switch you could still find your battery dead.
__________________
Byron & Anne enjoying the everyday Saturday thing.
Byron Kinnaman is offline   Reply With Quote
Old 08-15-2018, 04:26 PM   #14
Senior Member
 
Name: Greg
Trailer: 2008 Casita 17 SD
Washington
Posts: 1,262
Registry
Quote:
Originally Posted by Byron Kinnaman View Post
A couple of easy solutions to battery depletion when not in use. If you can plug in the trailer and let the converter keep the battery charged. If you can't do that the best thing is to remove the battery and connect to a Battery Minder, Battery Keeper, or so other like device.

One of the problems with flooded cell batteries is that they will self discharge. Even with a cut off switch you could still find your battery dead.
Unless you've upgraded to a 4-stage "smart charger", your old 3-stage converter charger will gladly fry your battery in short order.
__________________

Casita Greg is offline   Reply With Quote
Reply

Tags
battery


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Help Needed - installing a disconnect switch and a battery charger Joe & Cherie Electrical | Charging, Systems, Solar and Generators 21 04-09-2016 08:59 PM
Battery disconnect and volt meter Terry M Problem Solving | Owners Helping Owners 2 05-28-2015 06:39 PM
Heavy Duty Battery Disconnect FTTRV Commercial Posts and Products 2 11-26-2013 09:36 AM
Low-Voltage Disconnect - Anyone Using One? dkdavies Electrical | Charging, Systems, Solar and Generators 6 10-06-2007 06:36 PM
Battery Disconnect Switch Victor Benz Electrical | Charging, Systems, Solar and Generators 18 07-06-2006 05:33 AM

» Upcoming Events
No events scheduled in
the next 465 days.
» Featured Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 11:00 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.