Compute electricity cost from power rating, hours of use and the unit tariff, including daily, monthly and yearly totals.
输入功率 P(瓦)、用电时长 h(小时)与电价,求电费。
| Item | Formula / Rule | Source / Standard |
|---|---|---|
| Electricity cost formula | Cost equals consumption in kilowatt-hours times the tariff, accumulated by tier where applicable. | IEC 62052-11:2020, electricity metering equipment |
| Metering accuracy | Energy meters are classified by accuracy class; a higher class means smaller measurement error. | IEC 62053-21:2020, particular requirements for static meters |
| Demand charge | Commercial users are often billed separately on maximum demand, independent of total consumption. | IEC 62053 series & utility tariff practice |