What Are High Output Alternators?

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What Are High Output Alternators?

Although there are a few ways to deal with a shortage of power (including additional batteries and stiffening capacitors), a high output alternator is the only way to address the problem. These high-powered units put out higher amperages than factory alternators and are available from aftermarket manufacturers, rebuilders, and OEMs.

Since factory alternators aren't uniform in terms of power output, the term high output alternator is going to be relative to the original amperage rating of a vehicle. To qualify as a high output unit, an alternator needs to provide more amperage than the factory unit that it replaced. That means there is a big difference between a high output unit that provides 100A at idle speeds and a water-cooled unit that provides upwards of 350A. There's also a difference between simple re-winds and units that are remanufactured from the ground-up.

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The first alternators blew older dynamo generators out of the water in terms of raw amperage output. However, the electrical systems that they had to supply in the 1960s were nothing compared to the electrical systems today. Many early factory alternators were only capable of putting out a maximum of 30A, which is a number that many modern stock units beat at idle speeds.

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