A prepaid electricity meter is an energy metering device that operates on a "buy now, use later" basis. Users need to pay for electricity upfront, similar to topping up a mobile phone credit account, and only after entering the amount into the meter can they use the electricity. The meter will issue a reminder when the remaining balance or the amount of electricity is running low; it will automatically cut off power when the balance is depleted, and power will be restored after a top-up.

The core difference between prepaid and postpaid electricity meters lies in the order of consumption and payment: Prepaid meters require users to top up their accounts before using electricity, similar to mobile phone bills. Users actively purchase electricity and deposit it into the meter; the balance is deducted in real time, and power is cut off when the balance is exhausted. Postpaid meters, on the other hand, use a pay-as-you-go system, similar to utility bills. Users pay monthly based on meter readings from the power company.

The two types of meters differ significantly in terms of payment flexibility, electricity usage control, and the risk of overdue payments: the prepaid model allows users to manage their electricity budget more intuitively and avoid overdue payments, but requires them to monitor their balance; the postpaid model reduces the burden of daily self-management, but carries the risk of late payment fees. Technically, both types of meters can be equipped with smart features to enable remote meter reading and data processing.

The prepaid electricity meter operates on a "buy now, use later" intelligent control process: after users recharge via an app or mini-program, the data is synchronized to the cloud in real time and sent to the meter, and the system automatically updates the balance; the meter measures electricity consumption in real time and automatically deducts fees, sending a warning via the app when the balance is low; if the power is exhausted, the power is automatically cut off, and the user can remotely restore power after recharging. The entire process uses a two-way communication module to achieve encrypted data transmission and remote monitoring, ensuring the power company's electricity fee collection while providing users with a transparent electricity management experience.