This has created quite a discussion. My experience is more like the first post. When all things are working correctly battery voltage does change. After sitting overnight a battery will lose some voltage. If healthy it will be at or slightly above 12.5 volts or so. This is assuming there is no abnormal draw. After starting the system will jump up to the max allowed by the regulator, 14.5 or so, until the battery is charged back up. The voltage will gradually drop back to 13.5 or so. I think the assumption is correct that connections can and do make a difference. We have learned this on the old six volt tractors.
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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