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Old 03-23-2013, 11:28 AM   #1
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wiring 12v batteries to converter in a Casita?

After reading Handy Bob we want to hook up the 2 golf cart batteries and run to the back of the Casita to the converter. It was recommended to use #2 battery cable. The distance is 15 feet. Can't find the wire anywhere...or is there another option to hook the converter up? Is a 2/O or 4/O wire heavy enough to carry the voltage that distance?

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Old 03-23-2013, 05:21 PM   #2
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The next LARGER size wire from #2 is #1, next larger is 1/0, next larger is 2/0, then 3/0, then 4/0. So, yes, if #2 is needed 2/0 or 4/0 are most definitely big enough.
I'm not sure why you can't find #2. Are there any battery stores in your area?
Welding cable is actually more flexible than battery cable and makes an excellent substitute. In fact, I prefer welding cable. Do you have any welding stores in your area?

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Old 03-24-2013, 06:02 AM   #3
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Thank for the advise on the cable. I went to our local Menard store and found a length of 3/0 cable for a good price that will work just fine. Never thought about welding cable but will keep that in mind if there is a next time.
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Old 03-25-2013, 07:28 AM   #4
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Another good place to find larger gauge stranded wiring is a mobile stereo shop...The amps they use require heavy duty wiring.
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Old 03-26-2013, 06:33 AM   #5
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Originally Posted by wingnut60 View Post
Another good place to find larger gauge stranded wiring is a mobile stereo shop...The amps they use require heavy duty wiring.
Yea, you are mostly likely to find #8, #4, #2,#1, and #0 guage wire at car audio shops. Plus they'll have all the accompanying connectors you'll need. Big amps require big current, which is why they have such big cable there.

However with solar, bigger wire usually means less wire resistance which is key to maximizing the voltage at the battery and maximizing current efficiency through the cable without being wasted as heat. General rule of thumb is do the thickest you can handle within your budget, routing, cutting and crimping ability etc....
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