Posted by Buzzman72 on April 06, 2011 at 03:09:45 from (74.129.194.120):
In Reply to: 6 vs 12 volt posted by Kb on April 05, 2011 at 17:48:55:
It takes twice the amps at 6V to do the same amount of work as a similar 12V load. That's why 12V battery cables are smaller gauge than 6V cables.
Ever try to buy a 6V battery at 3 am? But you can buy a 12V battery at Wal-Mart around the clock.
A 6V system is fine, when you have everything set up perfectly: correct gauge battery cables, fully charged battery, and perfect setting on your ignition timing, with good points. BUT when the system is less than optimal, what are you going to use for a jumper vehicle? For most people, its their 12V pickup truck [or car]. And why is that? Because most 12V alternators put out more amps than most 6V generators, and they tend to keep your 12V vehicle at a "peak" state of charge, providing everything is working properly.
Finding 0-gauge battery cables these days takes some pretty good shopping...but that's what a 6V system needs to function properly. Most folks simply don't take the time, or spend the bucks, to give a 6V system what it needs for cables [remember: half the volts takes twice the amps to do the same amount of work]...and that's the usual rub in keeping a tractor 6V.
The 12V stuff is easier to find, AND it's cheaper.
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