Pre paid Smart Electric Meter: The “Power Gate” for Pay before Use
I. Core Logic: Transforming “Credit Risk” into a “Transaction Closed - loop”In the traditional post - payment model, users pay for electricity after using it, which easily leads to issues like arrears, debtors disappearing, and difficult collection. The logic of the pre - paid electric meter is: electricity consumption = balance deduction, just like mobile phone credit. When the balance reaches zero, the power supply is automatically cut off, similar to a mobile phone service being suspended when the credit runs out. This “pay - as - you - use” mechanism enables management parties to completely avoid financial risks and achieve 100% electricity bill recovery.
II. Working Principle: Three - step Process, Fully Automated
Recharge:
Users can pay through methods such as WeChat, Alipay, APP, or the management terminal, and the system generates a recharge instruction.
Transmission:
The instruction is sent to the electric meter via NBIoT, 4G, or RS485 network, and the balance in the meter is updated.
Control:
The electric meter monitors electricity consumption in real - time. When the balance is lower than a threshold (e.g., 10 yuan), it will give an automatic reminder. When the balance reaches zero, the relay trips and cuts off the power.
The whole process requires no human intervention. The fastest time from payment to power restoration can be completed in 10 seconds.
III. Core Functions: More than Just “Power - off”, It's an “Intelligent Butler”
Support for Tiered and Time - of - Use Tariffs
The pre - paid smart electric meter can set peak - valley electricity prices and tiered electricity prices (e.g., 1 yuan per degree for the first 100 degrees per month, and 1.5 yuan per degree for consumption over 100 degrees), guiding users to use electricity rationally.
Remote Switching and Permission Management
Administrators can remotely supply or cut off power through the platform, which is suitable for scenarios such as tenants moving out or illegal electricity use. It also supports temporary power supply (e.g., during maintenance), which is flexible and controllable.
Balance Warning and Automatic Reminder
Multiple - level warnings can be set (e.g., when the remaining balance is 50 yuan, 20 yuan, 10 yuan). The system automatically sends messages to users and administrators to avoid sudden power - off and resulting complaints.
Anti - theft and Safety Protection
It has functions such as cover - opening alarm, reverse - connection alarm, and abnormal current detection. When abnormalities are detected, it will automatically report to the platform. It also supports over - load protection. When the current exceeds the limit, the switch will trip automatically to prevent fires caused by over - heated lines.
Data Freezing and Financial Reconciliation
At zero o'clock every day, the electricity consumption and balance are automatically frozen, and a daily report is generated. It supports connection with the financial system to ensure consistency between accounts and actual situations.
IV. Communication Methods: Stability and Reliability are KeyThe pre - paid electric meter must ensure that instructions can be “sent out and received”. The mainstream communication methods are:4G Full - Net - Communication: It has a fast response and is suitable for scenarios with high real - time requirements.RS485 Wired Connection: It has high stability and is often used for centralized installation in switchgear rooms.When choosing, factors such as signal strength, wiring costs, and the difficulty of later maintenance need to be evaluated.
