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Why does the inverter display more power than the meter reading?

In most cases, the inverter displays more power than the meter reading.The main reason is: The reading on the inverter screen or monitor display is the power output of the inverter's AC output. The power generation is transmitted to the meter through an AC cable. There is some power loss on the AC cable. The loss depends on the amount of power loss. Cable material (copper, aluminum) length, wire diameter and other factors. Line consumption will cause the inverter to read more than the meter reading.


According to the normal error, the inverter current measurement accuracy is -0.5%, taking into account the error of the hardware sampling circuit and software technology. The overall error is calculated as +1% (inverter value is 1% larger than the actual value); the error of the meter is based on -1% (the meter value is 1% smaller than the actual value). The error at this time should be about 2%. (Do not consider the line loss, the maximum value of the instrument error)

Assume that a 10KW power station can send 60 kWh of electricity a day, 2% of the error is 1.2 kWh per day, and about 30 kWh per month. This situation is within a reasonable range!




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