Power analyzers measure electrical power characteristics of devices that generate, transform, or consume electricity. Also called power meters or wattmeters, these devices measure parameters such as true power (watts), power factor, harmonics and efficiency in power inverters, motor drives, lighting, home appliances, office equipment, power supplies, industrial machinery and other devices. 

Power analyzers also enable engineers to minimize energy loss due to distorted, transient waveforms in power electronics such as power inverters, motors, lighting circuits, and power supplies.