Hello, Henan Xuji Instrument DTSY566 Three-phase Four-wire Electronic Prepaid Meter inquires about the historical electricity consumption. You can follow these steps:

1. Check the total power: check the total power on the electric energy meter, and the total power = peak+flat+valley.

2. Check the time period power consumption: check the time period power consumption on the electric energy meter. If the peak and valley electricity consumption correspond to different time periods, the actual electricity consumption can be calculated in sections.

The above is the way to query the historical electricity consumption, I hope it will help you.