Abstract: In accordance with the teachings described herein, systems and methods are provided for performing differential measurements in an electrical system. A first meter may be used that has a first time reference. A second meter may be used that has a second time reference, wherein the second time reference is synchronous with the first time reference. The first and second meters may be configured to use the first and second time references, respectively, to take time synchronized measurements of the electrical system. A processor may be used to receive the time synchronized measurements from the first and second meters and compare the time synchronized measurements to determine one or more electrical characteristics of the electrical system. The processor may also be used to correct for any existence time variation between the time synchronized measurements.