dual battery isolater question?


  #1  
Old 03-10-03, 02:12 PM
RichO
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dual battery isolater question?

MODS---I have cross posted this question in the automotive forum also.I figured that there is a high possibility with the amount of experience on the electrical forum, that I may find a more detailed answer in this forum.My question concerns electrical components more than mechanical.If you feel that this question should not be in this forum please feel free to delete it.
Thank you and have a pleasant today.


Hello

I'm interested in building my own isolator for use in a duel battery system.What I'm trying to find out is what size/type of diodes to utilize.Any help would be appreciated.

thanks
Rich
 
  #2  
Old 03-10-03, 03:43 PM
J
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Location: welland ontario
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How many volts are the batteries? What size are the batteries? How current are you wanting to draw from these batteries during use and while charging?
 
  #3  
Old 03-10-03, 06:00 PM
RichO
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Whoops,totally didn't give enough information.

automotive batteries in a truck.Gas engine and winch duty.I want to isolate them from discharging each other and still be able to have the altenator charge both at the same time .

I understand there is a ~.7volt drop across the diodes.I'm not exactly sure how to deal with this yet.I did find a couple of sites like this one.
http://www.ferrotech.co.za/BatteryMate.htm.
That sell units that don't use diodes but I don't know how they work.

I understand that making a diode isolator isn't nearly as expensive as buying one and there may be a way to compensate for the voltage drop across the diodes.


http://www.piranhaoffroad.com.au/pro...o_isolator.htm
These guys have both types of isolators on their web site.

Thanks!
 
  #4  
Old 03-11-03, 09:29 AM
J
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Join Date: Sep 2002
Location: welland ontario
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I think I would go with a 30 volt. I don't know what the current draw is. If you are starting your engine you need about 500 amps so I would go with 800-900 amps.
 
 

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