1. The needs and characteristics of electric vehicle charging
With the popularity of electric vehicles, more and more families, communities, commercial places and public facilities are installing electric vehicle charging piles to provide convenient charging services for electric vehicles. Since it usually takes a long time to charge electric vehicles, it is particularly important to measure and manage electricity. In order to prevent the abuse of electricity or accurately calculate the user's electricity bill, many charging piles are equipped with single-phase fee-controlled meters.

2. Application of single-phase fee-controlled meters in charging piles
Single-phase fee-controlled meters can accurately record the amount of electricity used in the charging process of electric vehicles and charge according to the preset charging standards. The following are the specific advantages of single-phase fee-controlled meters in the application of charging piles:
Accurate measurement: The power consumption of electric vehicles during charging is usually charged by hour or charging amount. Through single-phase fee-controlled meters, charging piles can accurately record the actual amount of electricity charged by users (in kilowatt-hours) to avoid errors in manual estimation.
Charge management: For some charging charging piles, single-phase fee-controlled meters can automatically calculate the electricity bill that users need to pay. It can be flexibly set according to different billing modes (such as time-based billing, electricity-based billing, etc.) to ensure the transparency and fairness of the charging process.
Control and monitoring: Some advanced single-phase fee-controlled meters have remote control and monitoring functions. Charging pile operators can view the power consumption, fault status, user recharge status and other information of each charging pile in real time through the cloud platform. For places such as communities or shopping malls, administrators can control the start and stop of each charging pile through the meter to avoid unnecessary waste of electricity.
Preventing power abuse: Single-phase fee-controlled meters usually have a limit control function. For example, when the power usage reaches a certain limit, the meter can automatically cut off the power supply to prevent users from overcharging or prolonging the charging time, thereby achieving energy saving.

3. Charging piles and grid access
Most charging piles in homes and public areas usually use single-phase electricity (i.e. 220V power supply) when connected to the grid, especially charging piles with low power requirements. In this case, the single-phase fee-controlled meter installed on the charging pile can not only measure the power consumption, but also handle the electricity bill settlement to ensure that users pay according to the actual power usage.

4. Intelligent charging management
Some high-end charging pile systems integrate smart meters and fee-controlled meters to provide more intelligent services, such as:
Automatic power on/off: Automatically adjust the charging speed according to the battery power and charging demand.
Booking charging: Users can book charging through mobile applications, and the meter will automatically record the charging period and power consumption.
Time-of-day billing: Automatically adjust the billing standard according to the electricity price in different time periods (such as off-peak hours and peak hours) to help users choose a more economical charging time.
Remote control: Through the Internet platform, operators or users can remotely start or stop charging to optimize the use of power resources.

5. Multi-user shared charging piles
In some scenarios of shared charging piles, multiple electric vehicle users may charge at the same location at the same time. Single-phase electric meters can measure the power consumption of each charging pile separately, and even if multiple users charge at the same time, they can accurately allocate the power consumption of each user. Operators can view each user's charging records and electricity bill settlement through the backend system to ensure the accuracy of charges.