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The engine doesn't need an alternator. The vehicle it's sitting in does.

If the vehicle is very basic, has no electrical accessories, a 36 amp would be enough to keep the battery charged.

A vehicle with common accessories such as electric windows and locks should have a 63 amp or greater.

A vehicle with a winch, high output sound system or other high-draw accessories should be 100 amp or higher.

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13y ago

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