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02-15-2017, 09:27 PM
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#1
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Senior Member
Join Date: Aug 2016
Posts: 459
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Does anyone use a battery shutoff switch?
I killed my last RV battery last fall by leaving a light on in a storage area in my camper without it plugged in. I checked on it after a few weeks, and found I'd completely toasted my battery, it won't even hold a charge anymore.
I don't want to do that again.
Does anyone use a battery shutoff switch? Do you put it on the negative or positive side?
What kind do you use?
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02-15-2017, 09:36 PM
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#2
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Senior Member
Join Date: Jan 2017
Location: Kalamazoo
Posts: 2,139
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Ive owned a camper that had one pre installed. it was on the negative side. Never really used much because between trips things like the propane and co2 detector slowly drain any ways. Usually a battery would recharge and recover. How old was the battery? wonder if it was at the end of it's life and the two events took place at same time?
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02-15-2017, 09:37 PM
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#3
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Senior Member
Join Date: Jan 2015
Location: Englewood FL
Posts: 2,797
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You can put it in either the pos or the negative lead, whichever is more convenient.
__________________
2015 335DS
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02-15-2017, 09:40 PM
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#4
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Senior Member
Join Date: Aug 2016
Posts: 459
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Quote:
Originally Posted by Kimber45
Ive owned a camper that had one pre installed. it was on the negative side. Never really used much because between trips things like the propane and co2 detector slowly drain any ways. Usually a battery would recharge and recover. How old was the battery? wonder if it was at the end of it's life and the two events took place at same time?
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2 years old. My smart charger will say its charged, and my multimeter will say it has 12.5 volts. Then I connect a headlight bulb to it (floating crappie light) and it works. Then I remove it, and remeasure voltage, and its 0.01. After 5 minutes, it slowly comes back up to 12 volts.
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02-15-2017, 10:21 PM
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#5
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Senior Member
Join Date: Mar 2014
Location: Saint Louis
Posts: 1,458
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there are the factory installed battery disconnects which still allow CO2 and other small draws and will eventually kill your battery
or there are battery installed disconnects, that shut everything off
I use one at the battery to keep from draining my batteries with the parasitic draw and roaching them. I do have a factory installed one in the trailer, but it is never used
__________________
2015 Ram 2500 4x4 6.4l with 2015 Sandpiper 25RLS
Wife, myself and 2 furry kids
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02-15-2017, 10:44 PM
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#6
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Senior Member
Join Date: Nov 2013
Posts: 353
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present trailer came with switch always use it with no dead battery. previous unit I just disconnected neg cable at battery
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02-15-2017, 10:51 PM
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#7
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Senior Member
Join Date: Mar 2014
Location: Mountain Foothills of Southern Alberta
Posts: 2,005
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I use an
inline circuit breaker
connected to the negative cable.
__________________
2007 Surveyor SV230 - 200 Watts Solar/MPPT Controller - 220 AH Battery Bank (Two-GC2) - 600 watt PSW Inverter - (2) 2000 watt Inverter Generators - LED Lighting
2009 F150 - 5.4 Litre with Tow Package
Boon Docking 99% of the time.
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02-15-2017, 11:37 PM
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#8
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Senior Member
Join Date: Jun 2012
Location: Southern NM
Posts: 9,564
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Yep, negative is usually easier. Never have understood why you would install a cutoff that doesn't cutoff everything. Seems like the name would be different, like ... 'do nothing switch' or half-ass cutoff
__________________
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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02-15-2017, 11:41 PM
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#9
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Always Learning
Join Date: Nov 2011
Location: Four Corners, FL
Posts: 21,891
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Yep- I installed mine on the negative side for simplicity. Removing the cable from the battery was hassle as my batteries are under a storage hatch floor.
I bought an inexpensive switch from eBay as my install was inside.
http://learntorv.com/dead-battery-in...ry-disconnect/
__________________
Officially a SOB with a 2022 Jayco Precept 36C
Checkout my site for RVing tips, tricks, and info | Was a Fulltime Family for 5 years, now we're part-timing on long trips
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02-15-2017, 11:42 PM
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#10
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Always Learning
Join Date: Nov 2011
Location: Four Corners, FL
Posts: 21,891
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Quote:
Originally Posted by Mountndream
there are the factory installed battery disconnects which still allow CO2 and other small draws and will eventually kill your battery
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They're the biggest problems and why people install disconnects. I guess the argument is the safety aspect- in case someone forgets to reconnect the battery and they're without those protections.
__________________
Officially a SOB with a 2022 Jayco Precept 36C
Checkout my site for RVing tips, tricks, and info | Was a Fulltime Family for 5 years, now we're part-timing on long trips
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02-16-2017, 09:31 AM
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#11
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Senior Member
Join Date: Jun 2015
Location: Payson, AZ
Posts: 3,874
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installed one on the negative battery cable. prior to that the batteries would drain even with the factory installed cutoff switch. there are several parasitic drains on the battery. some have been mention but I found a few more on our trailer. anything that has a remote control fob has a control unit still connected to the battery in order to monitor for the fob keys being pressed (slide outs, fireplace, level up control board). my batteries would drain down while the trailer was in storage. now that I have a true disconnect switch the batteries have always had a charge in them when I go over each month to run the generator and check things out.
one word of caution: you must ensure that the batteries are connected before you move the trailer in order to supply voltage to the brake safety breakaway switch. in my case, I do not worry about this as I have to connect the batteries to raise the level-up legs which must be done before moving. but if you have to manually raise the legs I could envision a trailer being moved with the batteries still disconnected. another option would be to leave the breakaway switch leads connected to the battery so they cannot be disconnected. they will not drain the battery as they are not a load on the battery if the switch is not activated.
__________________
2015 cardinal model 3825fl
2015 dodge ram 3500 dually
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02-16-2017, 01:33 PM
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#12
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Senior Member
Join Date: Jan 2016
Posts: 236
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I installed Perko disconnect switch because I've had them on my boats for many years and trust them. My switch has Off, one, two and all positions to control two banks of 6V batteries. The switch is connected to my positive wiring.
I also installed a Perko on/off switch to my convertor as well.
__________________
Bill
2016 Forest River 3250 Cardinal
2016 RAM 2500 Longhorn
Previously: 36' Country Coach
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02-16-2017, 01:35 PM
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#13
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Senior Member
Join Date: Feb 2014
Location: Kenosha Wisconsin
Posts: 582
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I installed one about a foot away from my Battery when I was installed a second battery..
__________________
2013 Ram 2500 "Cummins"
2014 Columbus 340RK
Month of July in the Egg Harbor Campground, Door County, WI
5 stars
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02-16-2017, 01:42 PM
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#14
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Senior Member
Join Date: Jul 2007
Location: Jefferson County, MO
Posts: 5,453
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Quote:
Originally Posted by Mountndream
there are the factory installed battery disconnects which still allow CO2 and other small draws and will eventually kill your battery
or there are battery installed disconnects, that shut everything off
I use one at the battery to keep from draining my batteries with the parasitic draw and roaching them. I do have a factory installed one in the trailer, but it is never used
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The factory installed battery disconnect in my Silverback kills power to all the parasitic drains in the trailer including the propane detector.
__________________
Bob and Joyce
2013 CC Silverback 29RL
2010 Ford F250 XL Crew Cab 6.4 liter diesel
ATU Local 788
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02-16-2017, 01:46 PM
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#15
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Steelhorzz
Join Date: Mar 2013
Posts: 235
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Manual cut off switch
I use one similar to this on my cars. That way I don't have that continuous battery drain for any items, (clocks, sensors, vehicle's computer, etc.).
Got it on Amazon. I place mine on the Negative terminal.
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02-16-2017, 02:01 PM
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#16
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Casino Camper
Join Date: Dec 2015
Location: St Helens, Oregon
Posts: 184
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Electrically it makes no difference whether you use negative or positive.
However, for safety, all negative ground systems with metal chassis, the main disconnect should be on the negative side. Boats are usually on the positive side.
In all vehicle manuals they say to disconnect the negative terminal of the battery as the first step. The reason is that people used to remove the positive cable with a wrench and would accidentally touch the metal frame or hood and blow up the battery in their face.
__________________
2016 Cherokee 264L (Rear Living)
2013 GMC Sierra Denali
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02-16-2017, 02:16 PM
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#17
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Member
Join Date: Aug 2015
Posts: 41
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I use the factory batt switch and then attach a battery tender to maintain charge. My thoughts are the charge portion of the converter might be a bit rough on the batt. Any other thoughts on this?
Burk
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02-16-2017, 02:33 PM
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#18
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Senior Member
Join Date: Jan 2016
Posts: 217
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I have a 2017 5ver with 2 new batteries that purchased independently to ensure I had new stock, a parasitic drain will fletten them in about a week. Installed a cut off switch (screwed to side of battery box) on the negative side, and fixed the problem
https://www.amazon.ca/Marinco-701-Ba...cut+off+switch
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02-16-2017, 02:38 PM
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#19
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Site Team - Lou
Join Date: Oct 2009
Location: South Eastern PA
Posts: 23,269
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Quote:
Originally Posted by lugoismad
2 years old. My smart charger will say its charged, and my multimeter will say it has 12.5 volts. Then I connect a headlight bulb to it (floating crappie light) and it works. Then I remove it, and remeasure voltage, and its 0.01. After 5 minutes, it slowly comes back up to 12 volts.
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You have a bad battery.
__________________
Lou & Freya the wonder dog
2008 GMC Sierra 3000HD Allison Duramax
2019 Flagstaff 8529FL
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02-16-2017, 04:00 PM
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#20
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Professional Texan
Join Date: Mar 2013
Location: Texas
Posts: 366
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I installed one at my battery box on the negative side of the battery. I have accidentally forgot to turn it off and the battery was dead in 2 weeks.
I also added a small solar cell to maintain the battery
__________________
Texas Bob
2015 Chevrolet Silverado HD2500 Z71
2013 Prime Time Tracer Executive 2640 RLS
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