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Electrical Discussion of preventative/corrective maintenance and other technical issues regarding your coach's electrical system.

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  #191  
Old 11-17-2011
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MRPutz MRPutz is offline
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Thomas, Very good advice here from all.

Your four 6v batteries would be in a series/paralled configuration and would handle house and start. That is the "stock" setup for your vintage bus. This setup would yield 440aH but you can only use about 200aH as the batteries would be 50% discharged and you don't want to damage them.

IF you want to go just a little better, as I did, you can add starting batteries under the passenger seat storage bay. I added two 12v starting batteries in parallel there and isolated them with a heavy duty relay from Napa ($60). That's the best setup, or you could use the battery isolater method (diode) but that is not as good and costs about the same.

Then you have the best of both worlds. You can dry camp and never worry about starting with dead batteries. I used Cosco deep cycles and they cost about $75 each out the door. So for $300 you have a great deep cycle battery. To save money you could use your old batteries for the start. Then that frees up some capital to get a decent smart charger to protect your batteries.
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  #192  
Old 11-17-2011
thardst1 thardst1 is offline
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your diagrams helped....so the 12+ front cable for the 2 starting batteries - that just gets pulled/extended/shielded over to the starboard compartment, along with the 2 12v batts? then I guess something like the Xanerx would charge both banks.....thanks again, Tom
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  #193  
Old 11-21-2011
Kubla Kubla is offline
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Who make a reasonably priced battery cut off switch I can put on my FC, my batteries died in a week and I am sure I have everything off, and they are new batteries

I guess my next project after winterizing should be running the wire for the electrical hookup for the coach at my house
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  #194  
Old 11-21-2011
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Blue Sea makes several. Since it needs to handle the starter current you need a hi-current rated unit.
Depending on your alternator you may need a switch with an alternator diaconnect as well.

plain on off-, 600 amp cranking, 350 amp continuous.

http://www.wholesalemarine.com/p/BSS...FQM75Qod9h-QqA
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Last edited by gcyeaw; 11-21-2011 at 06:21 PM.
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  #195  
Old 11-22-2011
Harrison Harrison is offline
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What would my 1989 PT40 wb had for factory batteries? I read six 4d 12 volts someplace but do not see how you could ever fit such large batteries. It has six group 24's plus the gen. battery at the moment.
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  #196  
Old 11-22-2011
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Brent,
Here is how I had 6 4d's mounted in my 1990 wb. Hope this helps
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  #197  
Old 11-22-2011
Harrison Harrison is offline
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This is how my bird is set up and all of the cables look factory, So is this how it would have came from the factory
?
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Harrison, AR.
No Bus Now previously owned 1989 PT40WB
"Short Bus"
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  #198  
Old 11-22-2011
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Brent,
That is how mine looked minus the bulk oiler.Mine did not have a bulk oiler. The shelf was where my factory "battery boiler" was. I replaced it with a truecharge 40 3 stage charger on the advice of Shane Fedeli. It was an excellent choice an I used the casing from the boiler to cover and protect the new charger. I had a local fab shop make up the battery tray that I bolted right over the top of the factory tray,I used diamond shaped expanded metal for the tray bottom.
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  #199  
Old 11-22-2011
Harrison Harrison is offline
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My coach has newer batteries but a couple of them are bad and I would like to replace them with the largest 12v battery that will fit in the stock battery location, The charger is also gone so I will need to replace it to.
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Harrison, AR.
No Bus Now previously owned 1989 PT40WB
"Short Bus"
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  #200  
Old 11-22-2011
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Quote:
Originally Posted by Harrison View Post
My coach has newer batteries but a couple of them are bad and I would like to replace them with the largest 12v battery that will fit in the stock battery location, The charger is also gone so I will need to replace it to.

Brent,

You need to update your signature to let us know what year and model of 'Bird that you own now, so we may better help answer your questions.
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