What is the main function of a generator on a ship?

The primary function of a generator on a ship is to create and supply electricity, which is essential for powering various electrical systems and equipment onboard. Generators convert mechanical energy, typically sourced from the ship's engine, into electrical energy. This electricity is crucial for a multitude of operations, including lighting, navigation systems, communication, and powering other vital onboard machinery.

While other functions mentioned, such as storing excess electricity or distributing power, are important in the context of a ship's electrical system, they are not the main function of a generator itself. The generator's role is focused on the production of electricity, making it the fundamental component that supports the entire electrical infrastructure of the ship.