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Old 09-08-2013, 12:06 PM   #11
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Agreed, I'm a little confused too but it seems to me you have two problems not just one.

As the previous poster said, find out what is all plugged in and hard wired to the 15A breaker that's tripping. Disconnect them and reconnect them one at a time. Of course all disconnecting and reconnecting should be done with the breakers off. Each time you add an appliance or load, turn the power back on for a few minutes to see if it trips. Once it does, you should have it narrowed down.

As for the DC side. Just to be clear... ALL of the lights in the unit, radio, TV amp, furnace, LP detector, roof vent fans, fridge (running on gas)... None of them work? If this is the case, check inside your converter/breaker box. Look for a collection of high amperage fuses (usually 2 - 4) rated some where between 20-40 each that should be right next to each other. This would be the main fuse cluster from your battery. Sometimes reversing polarity on a battery can blow these. Check you battery polarity. If none of this is wrong look at your battery cables and make sure there are no cuts or bare spots from the battery all the way back to the converter (I hope you don't have an enclosed underbelly.

It's a start anyway... Best of luck!
well it seems that I'm dealing with the DC part I was able to check all the receptacles as they are on the 120 and that is fine. I traced out the wire from the circuit breaker that is tripping and it feeds the transformer that provides the dc 12 volt. I then thought maybe there is something with the dual battery set up . This is real confusing for me , I would think that on a duel system battery's running in succession would have to both be equal. Not so here. I have a 6 volt @6.55 v and a 12 volt running 12.11V ? (RV Is new to me bought it from a private seller) I thought if you run two battery they must be equal? Could this be as simple as having the wrong batteries? If so maybe one of the batteries have warped plates causing a short?
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Old 09-08-2013, 12:19 PM   #12
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well it seems that I'm dealing with the DC part I was able to check all the receptacles as they are on the 120 and that is fine. I traced out the wire from the circuit breaker that is tripping and it feeds the transformer that provides the dc 12 volt. I then thought maybe there is something with the dual battery set up . This is real confusing for me , I would think that on a duel system battery's running in succession would have to both be equal. Not so here. I have a 6 volt @6.55 v and a 12 volt running 12.11V ? (RV Is new to me bought it from a private seller) I thought if you run two battery they must be equal? Could this be as simple as having the wrong batteries? If so maybe one of the batteries have warped plates causing a short?
You can not hook 6V to 12V take the 6 volt out of the circuit. get another 12v and wire them PLUS to PLUS and NEG to NEG. Get the same amp hrs. I think you found your problem or just stay with 1 battery, unless you dry camp alot.........
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Old 09-08-2013, 12:21 PM   #13
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I don't think anything downstream of the converter (you called it a transformer) is going to cause it to trip it's breaker. You could always disconnect the batteries to make sure.

It sounds to me like it's time for a new converter. You should look into the Progressive Dynamics brand. Note that you don't normally have to replace the whole box...just the converter piece.

Assuming you have a WFCO converter now, you can find a troubleshooting document for it in our Library.

Please make sure you measured the battery voltage directly on the posts of each battery. I think it's very unlikely that someone installed both 12v & 6v batteries. Look at the labels. Maybe the 6v one is a badly discharged 12.
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Old 09-08-2013, 12:24 PM   #14
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You can not hook 6V to 12V take the 6 volt out of the circuit. get another 12v and wire them PLUS to PLUS and NEG to NEG. Get the same amp hrs. I think you found your problem or just stay with 1 battery, unless you dry camp alot.........
From what I've seen, most people recommend two 6v in series if you're going to have two batteries. Also multiple batteries have to be matched up so replacing one is usually not an option.
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Old 09-08-2013, 02:10 PM   #15
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From what I've seen, most people recommend two 6v in series if you're going to have two batteries. Also multiple batteries have to be matched up so replacing one is usually not an option.
If you read my post Barry you would seen that I said that. You need to match the amp hrs. Ideally it would be great to buy new batteries. I do not know how old his 12v is do you? As far as what most people do it depends on your useage. I have a 2-12V battery pack which works perfect for me. It also depends on the space you have. It would take 4 - 6v to get the amp hrs. Besides the cost factor involved. I use to have 6 D-10's in my boat but I had the space and needed the power being a sail boat. There is always options. Lets hope the guy didn't fry his convertor.......He making progress......
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Old 09-08-2013, 02:23 PM   #16
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If you read my post Barry you would seen that I said that. You need to match the amp hrs. Ideally it would be great to buy new batteries. I do not know how old his 12v is do you? As far as what most people do it depends on your useage. I have a 2-12V battery pack which works perfect for me. It also depends on the space you have. It would take 4 - 6v to get the amp hrs. Besides the cost factor involved. I use to have 6 D-10's in my boat but I had the space and needed the power being a sail boat. There is always options. Lets hope the guy didn't fry his convertor.......He making progress......
It's not enough to "match the amp hrs". The older battery will have different characteristics than a new one (due to its usage/history). Putting the two in parallel will cause the older battery to draw down the newer battery to its level.

I agree with your earlier suggestion that it's probably best to just go back to one 12v battery.
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Old 09-08-2013, 02:37 PM   #17
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It's not enough to "match the amp hrs". The older battery will have different characteristics than a new one (due to its usage/history). Putting the two in parallel will cause the older battery to draw down the newer battery to its level.

I agree with your earlier suggestion that it's probably best to just go back to one 12v battery.
I agree with that except his 12V was measured at 12.11V that alone tells me it is not that old. Full charge is 12.8V on most batteries. he might even be a little over charged even.......You are right about the progressive compared to WFCO. I hope he get's it figured out.......
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Old 09-08-2013, 02:51 PM   #18
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I agree with that except his 12V was measured at 12.11V that alone tells me it is not that old. Full charge is 12.8V on most batteries. he might even be a little over charged even.......You are right about the progressive compared to WFCO. I hope he get's it figured out.......
I'm very sorry but that voltage doesn't tell you how old the battery is at all. What that tells you is that the battery has about 55% of its charge remaining. Since we don't know when it was last charged, we really don't know anything about it at all.
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Old 09-08-2013, 02:58 PM   #19
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The water in the cable would be tripping the house breaker not the one in the trailer.

Now for the battery. I am thinking you have two 6 volt battery, so if you measure from ground one will read 6 and the other will read 12. If that is true then 12.1 is a low battery but it is enough to run the lights.

Now I am thinking that you have two 12 volt battery and can select one or the other battery and the 12 volt battery that is reading 6 volt is selected and not being charged. Sel the other battery and your light should work until your battery run out of power. If this battery does run the light that is saying that 12 volt circuit is OK. Turn the breaker back on and if it does not trip, measure the voltage on the 12.1 battery is it now higher then the 12.1 reading earlier? if it is the 12v battery that reads 6 may be bad ( shorted cell)

If the breaker trips again that would mean that the problem is after the breaker and before the battery. That leave the converter / battery charger has gone bad or something else that that breaker supply power to. The reason the light and other 12v are not working is the battery is not being charged because the breaker is tripped and not charging the battery.
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Old 09-08-2013, 10:45 PM   #20
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well it seems that I'm dealing with the DC part I was able to check all the receptacles as they are on the 120 and that is fine. I traced out the wire from the circuit breaker that is tripping and it feeds the transformer that provides the dc 12 volt. I then thought maybe there is something with the dual battery set up . This is real confusing for me , I would think that on a duel system battery's running in succession would have to both be equal. Not so here. I have a 6 volt @6.55 v and a 12 volt running 12.11V ? (RV Is new to me bought it from a private seller) I thought if you run two battery they must be equal? Could this be as simple as having the wrong batteries? If so maybe one of the batteries have warped plates causing a short?
This thread has drifted a little. Bottom line get that 6V battery out of that circuit!!! If wired in parallel with a 12V, the 12V battery is going to try and charge the 6V with (in a worst case) explosive results! In series the system is outputting over 18V which could toast all kinds of equipment in your rig (including you DC converter, what you referred to as your "transformer".)

Note if your system is parallel the lights should work from the one 12V battery and you should tape off the spare POS cable with electrical tape to keep it from grounding out on the frame of the trailer and sparking. If yours was a series system, removing the 6V battery may cause no power on the DC side of your system. Before doing anything else PM me or post again here. We need to discuss things further to make sure we're all on the same page.

Try your converter with just the 12V battery hooked up. See if it still trips the breaker. If it doesn't trip connect your multimeter to the POS and NEG terminals and see if the battery is charging. (A 12V battery will start charging in the 12-13V range and slowly climb, topping out at about 14.3-14.4V. After that the converter should back it down to about 13.2V (takes several hours to a day.)

You are correct. Dual battery systems need to have batteries of the same voltage and Amp Hour ratings. Wired in parallel, two 12V batteries can provide twice as much power as one (in theory) however, one battery will always be drawing from the other in order to stabilize voltages between them. Miss matched pairs in terms of size or performance will escalate this problem. Wired in series two 6V batteries are used to do the same thing. This system is preferred by most users as (when the battery sizes are equal) the two 3 chamber batteries act as one 6 chamber battery. There is roughly 2V of output per chamber. There is no "fighting" or equalizing as the batteries distribute voltage across them, not load.
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