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Old 07-25-2016, 05:01 PM   #11
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Battery disconnect

This may be of help

When to use the battery disconnect switch in your RV | Mobility RV Service
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Old 07-25-2016, 05:02 PM   #12
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What about one of those small solar battery chargers you attach to your battery? Anyone ever use one?
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Old 07-25-2016, 05:29 PM   #13
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on our Rockwood 8315 BSS, TT, everything is disconnected, Inc. CO2 detector & radio, except tongue jack and slideouts.
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Old 07-25-2016, 05:37 PM   #14
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thanks for all the replies. you've more than confirmed what I had been thinking. my batteries are draining too fast while the trailer is in storage and the batteries are 'disconnected'. from all the posts I can think of several loads that do not get disconnected: propane sensor, jack control unit, possibly the inverter (it has a remote switch which needs power), possibly the audio system (again a remote), and then there is remote that works with the slides. so i'm thinking a battery disconnect terminal attached to the battery to physically remove the cable connection is the way to go. if I do this I suspect the batteries should hold charge for a month. I go to the storage lot at the start of each month the run and exercise the generator so I can reconnect the batteries at that time and recharge them. as it is now I have to jump start the generator each month as the batteries have lost charge and are not able to start the generator. i'm really wondering what the manufacturer was thinking when they took the effort to include the battery disconnect switch that doesn't really disconnect all of the battery load. why bother? it seems all it is is an on/off switch to control 12 volt power into the 12 volt fuse box. if this is all it is why not just put it next to the fuse box and call it what it is, fuse master power in switch? and this is not just limited to the manufacturer. I can state that more than one dealer has a misperception about this switch also!
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Old 07-25-2016, 06:01 PM   #15
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Quote:
Originally Posted by CHICKDOE View Post
thanks for all the replies. you've more than confirmed what I had been thinking. my batteries are draining too fast while the trailer is in storage and the batteries are 'disconnected'. from all the posts I can think of several loads that do not get disconnected: propane sensor, jack control unit, possibly the inverter (it has a remote switch which needs power), possibly the audio system (again a remote), and then there is remote that works with the slides. so i'm thinking a battery disconnect terminal attached to the battery to physically remove the cable connection is the way to go. if I do this I suspect the batteries should hold charge for a month. I go to the storage lot at the start of each month the run and exercise the generator so I can reconnect the batteries at that time and recharge them. as it is now I have to jump start the generator each month as the batteries have lost charge and are not able to start the generator. i'm really wondering what the manufacturer was thinking when they took the effort to include the battery disconnect switch that doesn't really disconnect all of the battery load. why bother? it seems all it is is an on/off switch to control 12 volt power into the 12 volt fuse box. if this is all it is why not just put it next to the fuse box and call it what it is, fuse master power in switch? and this is not just limited to the manufacturer. I can state that more than one dealer has a misperception about this switch also!

If you remove the ground wire from the batteries, there will be nothing that can draw from said battery. Using a disconnect, I still juice to my jack but everything else is dead.
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Old 07-25-2016, 06:13 PM   #16
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The slides on our Cardinal are hydraulic, the pump is connected direct to the buss, not through the disconnect switch.
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Old 07-25-2016, 07:28 PM   #17
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Battery disconnect

I'm far from an expert on the disconnect switch however, I can tell you that I accidentally switched mine off and I was hooked to shore power and after two weeks my coach batteries and my engine battery were all dead! Couldn't be any worse if I just left it on without shore power. I always leave mine on and plugged into shore power.
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Old 07-26-2016, 03:14 PM   #18
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a small solar panel and controller would be a huge benefit for you, if the trailer isn't under trees or inside (obviously). Plus have you thought about how long you have to run a generator to fully charge a battery or batteries? again, solar is ideal for this purpose.
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Old 07-27-2016, 04:00 PM   #19
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to all, just thought I would give an update. I spent the morning trying to find everything that will run even when the battery is 'disconnected' via the factory installed disconnect switch. here's what I found that I believe are always on and drawing battery current:

level up leveling system (this has an always on control panel)
the slides that are hydraulically actuated (these have an always on sensor that works with a wireless remote)
propane detector

then there are several lights that will operate with the batteries 'disconnected' but they should not be drawing current as they are controlled by individual on/off switches. of course if you left one on by mistake it would draw power while disconnected.

so yes, my batteries do have a load on them and get drained even when 'disconnected'.
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Old 07-28-2016, 10:57 AM   #20
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It is fairly easy to reroute factory wiring in order to attain a true battery disconnect. The disconnect switch consists of two large threaded lugs onto which the factory wiring are attached via ring terminals. If one reroutes the factory wiring so only one wire comes from the battery (or battery bank) to a disconnect switch lug, and all other wires going to the RV's systems are connected to the other battery disconnect switch lug, a total battery disconnect is achieved. This is true if no other wires come out of the battery bank other than the ground-to-frame wire and the wire to the disconnect switch.
As noted, installing a ground terminal disconnect or disconnecting the negative cable at the battery terminal achieves the same thing.
Batteries so isolated from all RV loads will still experience a slow "self discharge" as a matter of physics simply by sitting there minding their own business.
If one achieves a total battery disconnect and then plugs in to shore power, the converter will not have any path to charge the batteries, but most will still provide 12vdc to power the RV's 12v systems.
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