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02-22-2020, 08:11 AM
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#1
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Member
Join Date: Jul 2018
Posts: 63
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battery disconnect
Going to put disconnect on trailer battery. Do I need to put on neg or pos. Just to keep from overcharging
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02-22-2020, 08:32 AM
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#2
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Senior Member
Join Date: Feb 2013
Posts: 175
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I put mine on the positive side.Now I don't have to worry about boiling the batteries.
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02-22-2020, 09:20 AM
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#3
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Senior Member
Join Date: Jun 2012
Location: Southern NM
Posts: 9,518
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Negative is usually easier. Just one cable between battery and ground.
It doesn't matter which one you use (- or+).
__________________
Scott and Liz - Southern NM
2012 Wildcat Sterling 32RL - w/level up (best option ever)
2007 Chevy 2500HD Duramax
Reese Fifth Airborne Sidewinder
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02-22-2020, 09:32 AM
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#5
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Site Team
Join Date: Oct 2014
Posts: 15,265
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For a disconnect switch either is fine as long as the ONLY thing connected directly to that battery terminal is one side of the switch. Note that you will need to remember to turn on the switch before towing in order to enable break-away braking.
__________________
2015 Freedom Express 248RBS
TV 2015 Silverado HD2500 Duramax
TST Tire Monitors
Honda 2000I + Companion
2 100W solar panels
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02-22-2020, 10:04 AM
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#6
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Pickin', Campin', Mason
Join Date: Aug 2015
Location: South Western PA
Posts: 19,074
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No matter how much arguing will take place in yet another thread discussing which post to use... it makes no difference which one you choose.
__________________
2022 Cedar Creek 345IK 5th Wheel•Solar & Inverter•2017 Ford F-Series SCREW 4x4•Factory Puck•B&W Companion•TST Tire Monitor w/Repeater•Sinemate 3500w Gen.
F&AM Lodge 358 Somerset, PA - JAFFA Shrine - Altoona, PA
Days Camped ☼ '19=118 ☼ '20=116 ☼ '21=123 ☼ '22=134 ☼ '23=118☼ '24=86
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02-23-2020, 06:22 PM
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#7
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Member
Join Date: Jul 2018
Posts: 63
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Thanks. Think I ruined battery by boiling out
__________________
Bluetick1955
2015 Cherokee 264L Limited
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02-23-2020, 06:30 PM
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#8
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Senior Member
Join Date: Feb 2018
Location: TEXAS
Posts: 9,124
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Quote:
Originally Posted by Bluetick1955
Going to put disconnect on trailer battery. Do I need to put on neg or pos. Just to keep from overcharging
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The easiest thing to do is just physically disconnect the negative cable.
__________________
2015 Dynamax REV 24TB class C
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02-23-2020, 06:42 PM
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#9
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Senior Member
Join Date: Jul 2017
Location: California
Posts: 7,616
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Quote:
Originally Posted by Reverse_snowbird
The easiest thing to do is just physically disconnect the negative cable.
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You mean getting out a tool and physically unscrewing a bolt or clamp is easier than twisting a knob on a disconnect switch?
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02-23-2020, 07:04 PM
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#10
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Senior Member
Join Date: Jan 2017
Location: Kalamazoo
Posts: 2,139
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Quote:
Originally Posted by babock
You mean getting out a tool and physically unscrewing a bolt or clamp is easier than twisting a knob on a disconnect switch?
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absolutely. I have a cheap ratchet and socket right in my battery box. Takes 5 seconds and I don't have to worry about the landing gear other stuff that comes off the battery before the panel still causing draw. for the price and time of installing a disconnect Ill keep unhooking my negative.
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02-23-2020, 07:56 PM
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#11
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Senior Member
Join Date: Jun 2012
Location: Southern NM
Posts: 9,518
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Quote:
Originally Posted by Kimber45
absolutely. I have a cheap ratchet and socket right in my battery box. Takes 5 seconds and I don't have to worry about the landing gear other stuff that comes off the battery before the panel still causing draw. for the price and time of installing a disconnect Ill keep unhooking my negative.
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Dang. I thought I was stubborn....
__________________
Scott and Liz - Southern NM
2012 Wildcat Sterling 32RL - w/level up (best option ever)
2007 Chevy 2500HD Duramax
Reese Fifth Airborne Sidewinder
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02-23-2020, 08:16 PM
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#12
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Senior Member
Join Date: Jan 2017
Location: Kalamazoo
Posts: 2,139
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Quote:
Originally Posted by NMWildcat
Dang. I thought I was stubborn....
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I have two batteries up front. one in the front compartment by landing gear and one in a small side compartment in front of the basement. They have multiple items coming off with inline fuses. For the time it takes me to disconnect it would be a mess to try and add one disconnect that would actually turn everything off.
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02-23-2020, 08:31 PM
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#13
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Senior Member
Join Date: Jun 2012
Location: Southern NM
Posts: 9,518
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Quote:
Originally Posted by Kimber45
I have two batteries up front. one in the front compartment by landing gear and one in a small side compartment in front of the basement. They have multiple items coming off with inline fuses. For the time it takes me to disconnect it would be a mess to try and add one disconnect that would actually turn everything off.
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That's why most folks I know just install the cutoff on the ground that goes to the frame. One wire, and you can spend from $6.99 to as much as you want for a cutoff switch. Then you won't wear out your post and clamp bolt
But everybody does what makes sense to them. No worries. Happy RVing!
__________________
Scott and Liz - Southern NM
2012 Wildcat Sterling 32RL - w/level up (best option ever)
2007 Chevy 2500HD Duramax
Reese Fifth Airborne Sidewinder
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02-23-2020, 09:52 PM
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#14
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Pickin', Campin', Mason
Join Date: Aug 2015
Location: South Western PA
Posts: 19,074
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Quote:
Originally Posted by Kimber45
absolutely. I have a cheap ratchet and socket right in my battery box. Takes 5 seconds and I don't have to worry about the landing gear other stuff that comes off the battery before the panel still causing draw. for the price and time of installing a disconnect Ill keep unhooking my negative.
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Landing gear motors, awnings and the like are NOT parasitic draws as they only draw power when you press the button.
__________________
2022 Cedar Creek 345IK 5th Wheel•Solar & Inverter•2017 Ford F-Series SCREW 4x4•Factory Puck•B&W Companion•TST Tire Monitor w/Repeater•Sinemate 3500w Gen.
F&AM Lodge 358 Somerset, PA - JAFFA Shrine - Altoona, PA
Days Camped ☼ '19=118 ☼ '20=116 ☼ '21=123 ☼ '22=134 ☼ '23=118☼ '24=86
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02-23-2020, 11:35 PM
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#15
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Senior Member
Join Date: Jul 2017
Location: California
Posts: 7,616
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Our trailer is next to the house and the battery disconnect is almost always off unless I am doing something to it. I just went outside to opened up the slide and then closed it for something I had to do. Easy peasy...turn the switch on, do my thing and then turn it off. Couldn't even imagine taking the battery cable off and on every time.
Putting the disconnect switch on neg or pos doesn't matter electrically. It just a convention for positive. If the negative is much easier, do it that way.
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02-24-2020, 09:29 AM
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#16
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Member
Join Date: Jul 2018
Posts: 63
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Quote:
Originally Posted by Reverse_snowbird
The easiest thing to do is just physically disconnect the negative cable.
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Yes but then I have to dig for a wrench
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