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Old 08-17-2011, 11:32 AM   #1
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BATTERY ON/OFF SWITCH - What Do I Do?

Pardon the dumb question, but when I am plugged into an electrical outlet, should the battery on/off switch be on or off?

Secondly, when travelling down the highway, same question: on or off?

Thanks.

Signed,
Newby still figuring things out!
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Old 08-17-2011, 11:37 AM   #2
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On.

The only time to turn it off is when you want to disconnect the batteries from the system and that is not often. Even then I wouldn't trust the switch to work properly and I would remove the cables from the batteries.

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Old 08-17-2011, 11:40 AM   #3
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Gene, okay. When I had it at the dealership for warranty work, I was moving some stuff out and one of the service guys was with me, and said "I'm going to turn the battery off." The unit wasn't there for any kind of battery work, so wondered why he felt it necessary to turn off. I should have asked him - but since then, am wondering.
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Old 08-17-2011, 11:45 AM   #4
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A really good tech. Bless him for caring about the dealership liability and the fire hazard presented by all kinds of unknown electrical gremlins. THAT COULD BE......not necessarily ARE.......................

God bless.........Dennis
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Old 08-17-2011, 11:46 AM   #5
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My understanding is that the appliances (fridge, heater, etc.) draw a small amount of power when in "stored" mode. So if you're not using your trailer for a few weeks, it's a good idea to turn the switch off - that way your batteries will not be drained.

When running, or hooked up to 110, leave the switch on.
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Old 08-17-2011, 11:48 AM   #6
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Old 08-17-2011, 11:50 AM   #7
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Quote:
Originally Posted by DEWASSINC View Post
My understanding is that the appliances (fridge, heater, etc.) draw a small amount of power when in "stored" mode. So if you're not using your trailer for a few weeks, it's a good idea to turn the switch off - that way your batteries will not be drained.

When running, or hooked up to 110, leave the switch on.
Okay. I think I've got it figured out now.

Thanks DEWASSINC et al.
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Old 08-17-2011, 12:34 PM   #8
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I don't know what the tech was working on, but there are times to disconnect the batteries when working on something, and so he did.

On thing that confuses people is that turning the switch off doesn't necessarily turn the red light off. I still don't understand that.

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Old 08-17-2011, 12:53 PM   #9
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When you turn off the power switch the light stay on, however, if turn on any light switch, the light for the power turn on/off switch will go off.
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Old 08-17-2011, 01:08 PM   #10
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Zia, that is the best description of that I've seen on the Forum. Do you know why it is wired that way?

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Old 08-18-2011, 10:31 AM   #11
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My guess is, that there may be some type of cpacitance in the circuit which keep the "the light on" on the switch indicator even after it is turned off, the moment you try to draw any current from the battery the on/off switch indicator light goes off.
Somebody who has electrical background may provide more accurate technical reason.

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Old 08-24-2011, 11:16 PM   #12
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We have lost battery power after a few hours of using only lights and fans. Voltage had dropped to 9.7 volts (LED's won't light up is what tipped me off).
Was plugged into shore power both times.

I had noticed that the battery switch solenoid didn't make the sharp snap noise, like before, when I hit the switch and the light stayed on.


RV Mechanic checked it out while I was gone last week. Said the solenoid behind the inverter that was not operating properly. He wired around it, then discovered the battery disconnect switch.

Is this an issue?

Thanks, Bob

PS: Batterys are 4 months old and checked out fine.
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Old 08-25-2011, 08:25 AM   #13
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breaker/solenoid?

Bob,

It sounds like you were "hooked up" without the converter in the loop.
I did not notice a solenoid (could it be a breaker?) in our wiring when I replaced the converter, but if your converter has one I would definitely put it back in the system.

You can see the breaker on the positive bus bar in this picture. The silver thingy behind black bracket.

Breaker or solenoid it's an important fail-safe and I would replace it.

Bob
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Old 08-25-2011, 10:03 AM   #14
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I would verify if the battery On/Off switch disconnects the battery from the emergency brakes. Need to keep battery power available to the trailer brakes while towing. I'm going to add a switch to my battery but the brake supply will be before the switch. This way I will still have emergency brakes even if/when I forget about the switch.
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