Why should the photovoltaic off grid system be equipped with LiFePO4 battery

　　Energy storage batteries are essential in off-grid systems.

　　The solar panel charges the storage battery through the controller, and the storage battery supplies the user with the inverter output through the off-grid inverter.

　　Why should PV off-grid systems be equipped with energy-storage lithium iron phosphate batteries?

　　In off-grid photovoltaic system, the task of the battery is to store energy, ensure the power stability of the system, and ensure the load and power consumption at night or cloudy and rainy days.

　　1. Photovoltaic generation time and load time may not be synchronized.

　　Photovoltaic power tends to be highest in the middle of the day, but many consumers use it at night, which requires lithium-ion batteries with long cycle life. Lithium iron phosphate batteries have theoretical cycles of 4,000 times or 10-year service life, while lead acid batteries typically last about two years.

　　2. Instability between Photovoltaic generation power and load power.

　　Photovoltaic power generation by the intensity of solar radiation, is not very stable. The load is not stable, such as air conditioning, refrigerator, starting power is very large, but the normal operation of less power. The battery is a power balancing device, and the lead acid battery is limited by its principle and can not have a large fluctuation in output, whereas the lithium iron phosphate battery has no such problem.

　　3. Cost control of off-grid system.

　　The energy storage efficiency of lithium iron phosphate battery can be increased to 95%, while the lead acid battery is only about 70%. The lithium iron phosphate battery is light in weight and small in volume. The real cost of maintenance is lower than that of lead acid battery.

　　Summary:

　　In recent years, the new installed capacity of PV system is increasing. According to the characteristics of PV system, lithium iron phosphate battery is recommended.