Solar panels belong to photovoltaic devices (mainly semiconductor materials), which produce current by photoelectric effect after irradiation by light. Because of the properties and limitations of materials and light, the generated current is also a wavy curve. If the generated current is directly charged into the battery or directly supplied to the load, it will easily cause damage to the battery and load, and seriously reduce their life. Therefore, we must first feed the current into the solar charge controller, use a series of special chip circuits to digitally adjust it, and add multi-level charge and discharge protection to ensure the operation safety and service life of the battery and load. When power is supplied to the load, the current of the storage battery is first flowed into the solar charge controller, and then into the load after its adjustment. The purpose of this method is to stabilize the discharge current, to ensure that the battery is not over-discharged, and to provide a series of monitoring and protection for the load and battery.
In order to use AC power equipment, it is necessary to add inverter to AC before load.
1. Intelligent maximum power point tracking technology increases efficiency 25%~30% 2. Compatible for PV systems in 12v, 24v or 48v 3. Three-stage charging optimizes battery performance 4. Maximum charging current up to 60a 5. Maximum efficiency up to 98% 6. Battery temperature sensor (BTS) automatically provides temperature compensation 7. Support wide range of lead-acid batteries including wet, AGM, and gel batteries 8. Multi-function LCD displays detailed information
In May, SOROTEC ushered in the 10th employee collective birthday party. We hope everyone can feel warmth and happiness by this activity.
At 8:00 p.m. on the 24th,Our company held the may birthday party of the group headquarters in the conference room on the second floor.Twenty-six birthday workers and company leaders, well-wishers attended the party.The whole birthday party scene is beautiful, the food is rich and varied.All of this brought a special birthday blessing to them.
Before the party, the company leader extended his sincere greetings to them, and wish them career progress, happy life.The management reform of the group is recognized, and such activities should continue thereafter.
A cake symbolizes a united collective, a candle symbolizes a hot heart, because of the collective heart became wonderful, because of the heart collective became proud. When the Happy birthday song rang ,the familiar and wonderful melody sounded. Light the birthday candles ,along with the familiar music , the birthday stars closed their eyes, made a birthday wish.The boss cut the birthday cake with all the birthday stars and distributed it to everyone, then bless you all once again. The atmosphere was pushed to the climax again.
Finally is the talent show program, everyone shows their ability.The atmosphere was filled with warmth and blessings.Friendship and love let us get together to spend this unforgettable time .The company provides such a platform to us, so that we can understand and take care for each other. Make us remember this happy and warm time, the sincere friendship like mountains and rivers flowing in our hearts forever. our friendship follow the sublimation of work, let the sunshine always accompany our life every day! Let us bless the birthday stars would be happiness, healthy, peace from year to year!
In the process of using UPS power supply system, people tend to unilaterally think that storage battery is maintenance-free and pay no attention to it. However, data show that the proportion of UPS mainframe failure or abnormal operation caused by battery failure is about 1/3. Therefore, it is more and more important to strengthen the correct use and maintenance of UPS batteries for prolonging the life of batteries and reducing the failure rate of UPS systems.
In addition to the selection of regular brand batteries, we should start from the following aspects to correctly use and maintain batteries:
1.Maintain appropriate ambient temperature
Ambient temperature is an important factor affecting the life of battery. The optimum ambient temperature required by battery manufacturers is between 20℃ ~ 25 ℃. Although the discharge capacity of batteries is improved with the increase of temperature, the cost is that the life of batteries is greatly shortened. According to the test results, once the ambient temperature exceeds 25℃, the battery life will be reduced by half for every 10℃ increase. At present, UPS batteries are generally maintenance-free sealed lead-acid batteries. Their design life is generally five years, which can be achieved only under the environment required by battery manufacturers. If it fails to meet the required environmental requirements, its life span will vary greatly. In addition, the increase of ambient temperature will lead to the increase of chemical activity inside the battery, which will generate a lot of heat, and in turn will promote the increase of ambient temperature. This vicious cycle will accelerate the shortening of battery life.
2.Charging and discharging regularly
The floating charge voltage and discharge voltage in UPS power supply have been adjusted to the rated value at the time of leaving the factory. The discharge current increases with the increase of the load. The load should be adjusted reasonably in use, such as controlling the number of electronic devices such as microcomputers. Normally, the load should not exceed 60% of the UPS rated load. Within this range, the discharge current of the battery will not be excessive discharge.
Because UPS is connected with municipal electricity for a long time, in the environment of high quality power supply and few blackouts, the storage battery will be in floating charge for a long time, which will lead to the reduction of the activity of the conversion between chemical energy and electric energy, accelerate aging and shorten the service life of the battery. Therefore, the discharge should be completed every 2-3 months, and the discharge time can be determined according to the capacity and load size of the battery. After discharge of a full load, recharge for more than 8 hours according to regulations.
3.Utilizing Communication Functions
At present, the vast majority of large and medium-sized UPS have the operability of communication with microcomputers and program control. The corresponding software is installed on the computer, and UPS is connected through serial/parallel ports. By running the program, the computer can communicate with UPS. Generally, it has the functions of information inquiry, parameter setting, timing setting, automatic shutdown and alarm. Through information inquiry, information such as input voltage, UPS output voltage, load utilization ratio, battery capacity utilization ratio, in-machine temperature and power frequency can be obtained. Through parameter setting, basic characteristics of UPS, battery maintenance time and battery exhaustion alarm can be set. Through these intelligent operations, it greatly facilitates the use and management of UPS power supply and its batteries.
4.Replace batteries in time.
At present, the number of batteries equipped with large and medium UPS power supply varies from 3 to 80, or even more. These individual batteries form battery packs through circuit connections to meet the needs of UPS DC power supply. In the continuous operation and use of UPS, due to the difference in performance and quality, the performance of individual batteries is degraded and the storage capacity is not up to the requirements and damage is inevitable. When one or more batteries in the battery pack are damaged, maintenance personnel should check and test each batteries to eliminate damaged batteries. When replacing new batteries, we should strive to purchase batteries of the same type as those of the same manufacturer. It is forbidden to mix acid-proof batteries with sealed batteries and batteries of different specifications.
1.Large blue LCD display interface，user-friendly. Pure high frequency online UPS，with voltage adjustment circuit,provide reliable power protection in the bad operation environment. 2.Comprehensive electric isolate and bypass protection. 3.Input power factor correction, reduce the harm of harmonic to the power grid,convenient to match small generators. 4.Automatic alarm, self test function. 5.Wide input voltage range. 6.Input neutral and live wire detect and data protect function. 7.When main power failure, the UPS going to DC start,Convenient and reliable; when main power recover,UPS restart automatically. 8.N+X Parallel Redundancy and Capacity expansion for 6K-10K.
1.The filtering accuracy is high, and the filtering rate of harmonic current can reach over 97%. 2.Wide range of filtering, frequency of filtering: 2-50 harmonics and interharmonics. 3.Fast response to load fluctuation with response time of 1us. 4.Dynamic injection current to suppress harmonics and compensate power factor. 5.No resonance with the system. 6.Extensible capacity with multiple combinations. 7.Suppressing system overvoltage and improving system voltage stability. 8.Damping power oscillation in power system. 9.It can restrain voltage flicker, compensate three-phase unbalance and improve power factor. 10.The system has strong self-protection and stability.
Meeting users’ requirements: – PF=0.99 and THDi < 5% – Compensation for 2- to 50-order harmonics – Capacitive and inductive reactive power compensation – Three-phase unbalance co
To optimize the efficiency and reliability of solar power generation system, a relatively new method is to use micro-inverters connected to each solar cell module. Each solar cell is equipped with a single micro-inverter, which enables the system to adapt to changing loads and weather conditions, thus providing the best conversion efficiency for a single solar cell and the whole system.
The concept of micro-inverters has a long history, but it did not attract people’s attention at first. In recent years, with the development of solar power technology and technological progress, micro-inverters are very attractive.
The photovoltaic power generation system with micro-inverters can simplify wiring, which means lower installation costs, higher efficiency of the solar power generation system, and shorten the time required to recover the initial investment.
Many chinese manufacturers of solar on grid inverters are mainly engaged in the development of high-power centralized on grid inverters. With the increasing popularity of domestic and foreign micro-inverters market, many manufacturers have begun to develop micro-inverters. The differences between micro-inverters and traditional inverters are as follows.
1.Inverter has low input voltage and high output voltage. The output voltage range of a single solar cell module is generally 20 to 50 V, while the peak voltage of the grid is about 311 V (220 VAC) or 156 V (110 VAC). Therefore, the output peak voltage of the micro-inverters is much higher than the input voltage, which requires the micro-inverters to adopt the inverters topology with step-up and step-down conversion function. The centralized inverters are generally buck converters, which usually adopt bridge topology. The peak voltage of the output AC side of the inverters is lower than that of the input DC side.
2.The power is small. The power of a single solar cell module is generally between 100W and 300W. The micro-inverters are directly matched with a single solar cell module, and the power level is between 100W and 300W. The traditional centralized inverters generate high enough power through series and parallel combination of several solar cell modules, and their power level is generally over 1 kW.
1.Touch screen display. 2.Output power factor PF=1.0 3.On grid with energy storage. 4.Energy generated record, load record, history information and fault record. 5.Language and time setting. 6.Structure with dust filter. 7.AC charging and AC output time setting. 8.Charging voltage and charging current timing. 9.External wi-fi device optional. 10.Parallel operation with up to only available for. 11.Smart battery charger design.
