A photovoltaic (PV) panel and a PV module are both components of a solar energy system, but they refer to different things. A PV panel is a single unit of photovoltaic cells that are used to generate electricity from sunlight. A single PV panel is typically made up of several photovoltaic cells connected in series or parallel and can range in size from a few square inches to several square feet. A PV module, on the other hand, is a complete, ready-to-install photovoltaic system that includes multiple PV panels and other components, such as an inverter, a battery bank, and a charge controller (for off-grid systems). A PV module is designed to be a complete, turnkey solution for generating electricity from sunlight.