Electrical power measurement system and method

A measurement system, the measurement system including:

• a processor and a memory coupled to the processor, the memory including computer readable program code components configured to cause the processor to:
• measure a first electrical input variable at an input to a power conditioner connected to an electricity supply;
• measure one or more electrical output variables at an output of the power conditioner;
• calculate a second electrical input variable at the input to the power conditioner according to the one or more electrical output variables measured at the output and the first electrical input variable measured at the input;
• calculate an estimated power according to the measured first electrical input variable and the calculated second electrical input variable;
• and
• send the estimated power via a data interface.