The residential distributed PV system is generally composed of solar panels, inverters, smart meters, energy storage batteries and other devices. In this system, solar panels are mainly responsible for converting solar energy into electrical energy, but the DC power cannot be directly used by household appliances. Therefore, inverters are the key conversion device to convert DC power into AC power for household load or feeding to grid. The energy storage battery is mainly used to store the surplus power generation during the peak time, and the surplus power can be used at night. The application of energy storage PV system has greatly improved the economic benefits of PV generation system.
Smart meter can be installed at three positions in energy storage PV system. One is between the inverter and the household load, which is mainly used to measure the total power generation of PV system. The other is between the household load and the national electricity meter, which is mainly used to measure the positive/negative energy. When the generation cannot be consumed by the household, the rest energy will be transmitted to the grid, which is recorded as negative power or negative energy. When the generation cannot meet the household needs which needs to purchase power from the grid, it will be considered as positive power or positive energy. The inverter will obtain these data via RS485 communication method, and then adjust the power generation efficiency or power the energy storage battery to achieve the function of anti-reflux. Another is between the inverter and the energy storage battery, which is mainly used to measure the charging and discharging data. To sum up, smart meter is a great help for the energy storage strategy, power consumption analysis, and anti-reflux function.
With the application of smart meter in distributed PV system, SOLARMAN Smart Meter is favored by many overseas users. The two best-selling smart meters are Single-phase Remote Control Meter (WiFi)-DDZY422-D2 and Six-circuit Multi-function meter-DTSD422-D3. For more information or the latest quotation, please contact info@solarmanpv.com.
