Electricity Consumption Survey Guide

About this manual

This document explains the steps and formulas needed to estimate the electricity consumption of household appliances. It describes how to record daily usage time, calculate active power consumption, and include standby (待電) power in the total.

The guide also provides example tables of standby power for common devices, basic definitions of voltage, current, and power, and tips for accurate measurement. This manual is written in Chinese.

What's inside

• Measurement Techniques
• Power and Usage Time Relationship
• Standby Power Table
• Household Appliance Power Ratings
• Basic Electrical Concepts
• Calculation Examples

Frequently asked questions

How is electricity consumption calculated?

It is calculated by multiplying the appliance's power (in watts) by the time it is used (in hours).

How do you account for standby power in the total consumption?

Add the standby power (待電) multiplied by the standby time to the active consumption.

What information is needed to estimate a microwave's electricity use?

The microwave’s rated power (e.g., 2850 W) and the daily usage time (e.g., 0.5 h).