This Dual Alternator Wiring Diagram is the representation of the setting up a system that includes two alternators in it. The relationships and linked phase between two dual alternators are highlighted and how they help in boosting the electrical capacity thus useful when there is a high demand for electrical energy. Especially for the automotive and marine engineers, it focuses on the disbursement of charging responsibilities, to generate power to charge the battery efficiently. Since each alternator is to perform a specific role in the system whereby it acts as a source of electrical supply to other equipment and boosts the nominal power of electrical capacity of the system, their specific roles are defined. When installing or upgrading dual alternators in cars, boats, or other special applications, this diagram will help to get the best of the system for demanding applications.