Photovoltaic energy storage battery is an indispensable energy storage component of the solar photovoltaic power generation system. Its main function is to store the electric energy of the photovoltaic power generation system and supply power to the load in case of insufficient sunshine, night and emergency. Common energy storage batteries include lead acid batteries, alkaline batteries, lithium batteries and super capacitors. They are used in different occasions or products. At present, lithium iron phosphate batteries are the most widely used, while lithium batteries are the fastest growing. At present, lithium iron phosphate batteries and ternary lithium batteries are mainly used. In terms of use, wall mounted household energy storage lithium batteries, rack mounted lithium batteries, power lithium batteries, etc.
Basic requirements of solar photovoltaic power generation system on energy storage battery:

Solar power generation system has high cost, low conversion efficiency and strong variability with the environment, so it has high requirements for energy storage. The service life of the solar photovoltaic power generation system is generally 20 years. The supporting energy storage link is required to have the characteristics of long service life, stable performance, high energy efficiency, and strong adaptability to the environment. The cycle life of ZXDY's wall mounted lithium battery storage has reached 6000 times, and it is equipped with a BMS intelligent management system, which can protect the battery from overcharge, over discharge, line short circuit and other aspects, with stable safety performance, In addition, it supports multiple battery modules in parallel or in series, with high energy efficiency.

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Performance analysis of lithium iron phosphate battery:
Lithium iron phosphate battery is a new type of secondary power supply developed in recent years. It is characterized by large input and output power, wide operating temperature range, no memory effect, maintenance free, 2000 times of charging and discharging service life, safety and environmental protection. It is becoming the leading role of chemical batteries.
The voltage platform of lithium iron phosphate battery is 3.2V, and the specific energy is more than twice that of lead-acid battery, while the specific volume energy is 4-5 times that of lead-acid battery. If lithium iron phosphate battery is used in photovoltaic power generation system instead of lead-acid battery, the space occupied by the battery can be greatly reduced and the maintenance workload can be reduced. In terms of photovoltaic energy storage efficiency, lithium iron phosphate battery has obvious advantages.