Complex sentence: It is the result of a conversion of an existing EMD GP38, where the existing diesel prime mover was replaced with a set of 1,080 12-volt lead-acid batteries and associated control equipment.
Split into simpler sentences: It is the result of a conversion of an existing EMD GP38-type locomotive. This involves replacing the existing prime mover with a set of 1080 12-volt lead-acid batteries, and associated control equipment.