Brief Analysis of Residential PV Storage System Applications
With the tightening supplies of energy and deterioration of environment pollution in the global, more and more people are aware of the importance of new energy, especially solar energy and wind energy. According to reports, by the end of 2018, China's cumulative installed capacity of photovoltaic has reached more than 170GW. In 2018, since “5.31 policy”, the installed PV capacity of China decreased to about 43GW. Since the amount of photovoltaic power generation depends on the light intensity and temperature, it is a certain challenge to the stability of the entire power system when it is connected to the grid at a large scale. At the same time, with the development of the economy and the progress of society, the peak-to-valley difference presented by the power supply and demand curve is getting larger and larger, which causes the imbalance of supply and demand of the power system. In order to solve this problem, energy storage system is your preferred choice.
After installing PV energy storage systems, the self-consumption of solar energy rate can reach 80%, which can greatly reduce user’s electricity bills. At the same time, the energy storage system can also solve the problem of grid instability or no power supply. Based on the above application requirements, JFY has launched the SUNMAX 3Kw/5kW series of hybrid storage inverter.
JFY SUNMAX hybrid storage inverter is able to work in both on-grid and off-grid mode. The switching time of the two modes is less than 10ms, which can ensure the important load uninterrupted power supply. And also it can compatible with lithium batteries and lead-acid batteries, customers can choose freely according to their actual demand.
On-grid Storage Working Mode
Off-grid Storage Working Mode
SUNMAX adopts advanced MPPT algorithm and the conversion efficiency up to 99.9%. It uses industry-leading inverter circuit, which can greatly reduces leakage current and improves system safety. It adopts high-frequency isolation transformer and excellent charge and discharge management system, ensure the safe, stable and efficient operation of the battery.
SUNMAX adopts the LED display, and supports remote parameter settings (web or WeChat public account or APP). Such as working mode, load power priority, battery charge and discharge time, etc. Adopting natural heat dissipation method and IP65 protection grade, it can adapt to outdoor installation requirements.
It configured with a variety of communication methods, such as standard RS232 port, Bluetooth, GPRS or WIFI communication (optional), lithium battery can choose RS485 or CAN communication.
Considering the initial investment cost of the PV energy storage system, the user may not need to purchase the battery in the early stage. If the FIT declines greatly or cancels later, then user can buy the battery and consist of an energy storage system to increase system revenue.
JFY has been focusing on the renewable energy field for fifteen years, and will continuously improve product performance and service quality through technological innovation and optimized management, and provides guarantee for customers' investment profit. Whether in domestic or overseas markets, JFY will continue to create economic and environmental benefits through efficient and high quality solar inverter products.
