National standards stipulate that the minimum current intensity of residential smart meters is 5 amps. Smart meters are standardized and unified in terms of function definition, appearance structure, technical indicators, test and detection, etc.

1. Clarify the definition and functions of smart energy meters. It can realize various functions such as two-way and stepped metering of electric energy, load control, intelligent anti-electricity theft, real-time monitoring, and information interaction.

2. Unify the appearance structure. The appearance design of smart electric energy meters has been reduced from thousands to four, which has greatly reduced the design, development, processing and other costs of electric energy meter enterprises.

3. Unified communications protocols and security specifications. It realizes two-way interaction between electric energy data collection and setting. Electric meter data can be collected in real time, online payment and electricity information query can be provided. It can provide big data, cloud computing and other data support for smart home electric energy applications.

4. Innovatively propose multiple test methods such as the influence of power supply voltage. A standardized testing method system has been established, which has greatly improved product quality and reliability, and enhanced the core competitiveness of smart energy meter companies in the international market.