Like said, voltage regulators are temperature compensated. Some are very active, some are not. Some read battery temperature through a sensor under the battery , most don't. Some regulators for continuous use like farm tractors running for many hours full bore have a lower set point to reduce overcharging. When IH started using the lower voltage regulators , most thought the alternator was defective. That being said, normally when checking for full rated output of a alternator, you load the battery until it drops to 13 volts and at that voltage the alternator should be capable of turning out it's rated amperage, like 100 amps for a l00 amp alternator or within 90 percent of that. So, you can see , that voltage will normally drop some when using a lot of current.
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Today's Featured Article - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
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