Power output refers to the amount of electrical power that is generated or used by an electric system, device or component. It is typically measured in watts (W) and can be calculated by multiplying voltage (in volts) by current (in amperes). Power output is important because it determines how much work a machine or system can perform, and it affects the efficiency of energy conversion within that system. The higher the power output, the more capable the device or system is at performing tasks or providing services.