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According to the International Energy Agency(IEA)’s authoritative report 2019 on renewable energy market forecasts, the installation of solar photovoltaic systems in house-wholes, commercial and industrial facilities will grow significantly over the next five years and will significantly change the way electricity is generated and consumed. By 2024, DISTRIBUTED PV is expected to account for nearly half of the total PV market, with industrial and commercial distributed PV becoming the dominant market owner, accounting for approximately 75% of your new installations over the next five years. Meanwhile, the number of residential PV systems installed in homes is expected to reach about 100 million by 2024. Developed countries such as Australia, Belgium, California, the Netherlands and Austria will be the fastest growing markets for PV.
While photovoltaic is growing strongly in the installed growth of renewable energy, battery energy storage systems are also moving forward. However, in the photovoltaic energy storage system, the photovoltaic energy input end is essential for the solar control charger of the energy storage station to undertake the role, but throughout the current MPPT controller market, for DC system voltage of 360V above the medium voltage controller resources are relatively scarce. In addition to the electrochemical system, the series circuit tends to increase the risk of electricity safety, so the emergence of MPPT controller in this voltage range is bound to help the rapid development of home and commercial PHOTOVOLTAIC systems, do you think so?
So, let's first have a general understanding of MPPT. The main function of MPPT control in the system is to detect the main circuit voltage and output current, to calculate the output power of the solar array, and achieve the tracking of the maximum power point. In the internal components, the disturbance resistance R and MOSFET series together, in the output voltage is basically stable, by changing the MOSFET duty cycle makes the average current through the resistance changes, so the current disturbance. In the same case, the output current and voltage of photovoltaic cells will also change, and the direction of disturbance in the next cycle will be affected by measuring the changes of photovoltaic cell output power and voltage before and after the disturbance. Then, when the direction of disturbance is correct, the output power of the solar panel increases, and the next cycle continues to be disturbed in the same direction; otherwise, it is disturbed in the opposite direction. In this way, the disturbance and observation are carried out repeatedly to reach the maximum power point of the solar photovoltaic panel output.
Then, it is obvious that as the voltage increases, the resistance disturbance frequency will also increase, so the demand for the stability of the controller panel will increase. As leading service provider of power quality, Aerospace Baykee (Guangdong) Technology Co., Ltd. has a forward-looking R&D investment in the explosive growth of PV energy storage in the industry and industry. Our wall-mounted 384V100A MPPT solar controller technology is a leading stable technology in the industry and plays a pivotal role in PV power generation and battery energy storage applications (BESS).
So, what are the features of this MPPT charging controller that can support its role? The following parts will be shown about that,
1. Superior efficiency
MPPT maximum power point tracking technology, ensure the tracking efficiency is not less than 99.5%. High quality components are used to improve system performance, making the maximum conversion efficiency up to 98%. At the maximum power point, the tracking speed is fast and the tracking efficiency is guaranteed.
2. Powerful automatic tracking capability
Accurate identification and tracking of multi-wave peak maximum power point, reliable automatic limit function of maximum photovoltaic array input power to ensure no overload under any conditions. Moreover, a wide voltage range of maximum power point operation of PV array is realized.
3. Rich supporting functions
The LCD screen is designed to dynamically display the operating data and working status of the equipment. It has the function of battery temperature compensation and real-time electric quantity statistics and record. At the same time, the standard Mod-bus communication protocol based on RS-485 communication bus can maximize the needs of different occasions.
Therefore, in the steps of battery charging can better play a stable role. The controller has three charging modes: quick charge, maintenance charge and float charge. Through these several fast, efficient and safe battery charging methods, the system can effectively prolong the service life of the battery,
A、Quick charge stage
In the quick charging stage, if the battery voltage has not reached the set value of full voltage (i.e., equalizing/boosting voltage), the controller will charge the battery with MPPT and provide the maximum solar energy. When the battery voltage reaches the preset value, the battery will be maintained charging.
B、Maintenance charge stage
When the battery voltage reaches the set value to maintain the voltage, the controller will carry out constant voltage charging, this process will no longer charge MPPT, and the charging current will gradually decrease with time. The default duration of the maintenance charge stage is 0.5H. When the duration reaches the set value, the system will switch to floating charge stage.
C、Float charging stage
After the maintenance charging stage, the controller will reduce the battery voltage by reducing the charging current and maintain the battery voltage at the floating charging voltage set value. Float charging stage for the battery is very weak charging, to ensure that the battery is maintained in full state. In the floating charge stage, the load can capture nearly all the solar energy. If the load exceeds the solar power supply, the controller will not be able to maintain the battery voltage in the floating charge stage. When the battery voltage drops to the set value, the system exits the floating charge stage and enters the quick charge stage again.
At this point, I believe you have a certain understanding of what type of MPPT can support the development of photovoltaic and energy storage. Baykee, as a leading electric power supply manufacturer, will be a significant contributor to the development of your business in industrial and commercial photovoltaic and energy storage.