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1.Industrial workshop: especially in the large electricity consumption and expensive electricity fees factories, usually the roof area is large, wide flat roof, suitable for installation of photovoltaic arrays and due to the large load, distributed solar power system can do to offset part of local consumption, online consumption, thereby saving electricity.

2.Commercial buildings: it is similar to the effect of industrial workshop, the difference is that the commercial buildings is mostly cement roof, more favorable to install photovoltaic array, but often have the aesthetic requirements of the building, in accordance with the characteristics of commercial buildings, office buildings, hotels, conference centers, resorts and other buildings, the characteristics of the loads generally showed higher in daytime, while the night is low, can better match the photovoltaic characteristics.

3.Agricultural facilities: there are a large number of usable roof in rural areas, including its own residential, vegetable greenhouses, fish ponds and so on, the countryside is often at the end of the public grid, poor power quality, the construction of distributed outdoor solar power system can guarantee the electricity and power quality.

4.Public buildings: as a unified management standard, the load and business behavior is relatively reliable, high installation enthusiasm, municipal and other public buildings is also suitable for the distributed solar power system.

5.The remote areas and islands: due to far away from power grid, remote agricultural and pastoral areas in China such as Xinjiang, Tibet, Qinghai, Inner Mongolia, Gansu, Sichuan and other provinces as well as Chinese coastal islands, there are millions of people without electricity, PV system or complementary with other energy micro grid power system is very suitable for application in these areas.

SSP3111C 1-2KVA High frequency Off-grid Solar Power Modified Sine Wave Inverter

At present, the efficiency of solar cell is relatively low, and can produce a small amount of electricity.Now, scientists have created a new solar hybrid inverter system that can make full use of the full spectrum solar radiation. This means that hybrid solar cells can not only convert solar energy into electrical energy, but also convert the heat into electrical energy.

The new hybrid solar panel system produces 5 times higher voltage than other hybrid solar inverter systems. In order to build a brand new hybrid solar panel, the researchers used the polymer called PEDOT, the researchers laid a dye-sensitized solar cell on the PEDOT film, PEDOT film can heat due to light. In the bottom of the PEDOT layer, scientists added thermoelectric thin films and a thermoelectric element, can convert heat into electricity.

The components that work together are 20% more efficient than a single solar cell, which generates enough power to drive LED lights and electronic displays.

SSP3119C 1-5KVA On/off Grid Hybrid Solar Inverter with Energy Storage

Pulse width modulation (PWM) is a very effective technique for the control of analog circuits based on the digital output of microprocessors, it is widely used in many fields, such as measurement, communication, power control and transformation

Pulse width modulation is an analog control mode, according to the corresponding changes in the load to the base of the transistor bias modulation or MOS tube grid, to achieve a transistor or MOS tube turn-on time of change, so as to realize the switching power supply output change. In this way, the output voltage of the power supply can be kept constant when the working condition is changed. It is a very effective technique to control the analog circuit by the digital signal of the microprocessor.

With the advantages of simple control, flexible and dynamic response, PWM control technology has become the most widely used control method of power electronics technology, and it is also the focus of research. Because of the development of science and technology, there is no boundary between disciplines, and the combination of modern control theory or the realization of non resonant wave switching technology will become one of the main development directions of the PWM control technology. According to the change of the corresponding load, the bias of the transistor base or the MOS tube grid is modulated to realize the change of the turn-on time of the transistor or the MOS tube, so as to realize the change of the output of the switching voltage stabilized power supply. In this way, the output voltage of the power supply can be kept constant when the working condition is changed. It is a very effective technique to control the analog circuit by the digital signal of the microprocessor.

SSP3111C 1-2KVA Modified Sine Wave Solar Power Inverter For Home With PWM Solar Charge Controller

In the solar power generation system, it is mainly composed of PV module, storage battery, solar controller and load. Although the cost of solar energy controller is only a small part of the PV system, the choice of the controller can optimize the system to a large extent.At present, the popular solar controller on the market is mainly ordinary solar controller, PWM solar controller and MPPT solar controller. Ordinary solar controller is the first generation technology, due to the factors of the internal resistance of battery, it is difficult to charge batteries fully, and solar panels is not fully utilized, the MPPT tracking efficiency is only 70%-76%, so it has been out of the market. PWM solar controller is the most popular used, solar MPPT controller is nowadays trend, so more and more people in the industry have to make a choice between PWM solar controller and MPPT solar controller.

PWM solar controller is the second generation technology, it use the PWM control mode, compared with ordinary solar controller, has been improved a lot. Pulse width modulation (PWM) is an effective technique to control analog circuits by digital output. In the PWM solar controller, the battery pack is not only the storage of the electric energy, but also the voltage regulator of the solar system. Real time monitoring of battery potential by controller, and the number of potential solar access control or cut out of the sub matrix (or duty cycle rate), so as to adjust the charging current charge into the battery, in order to control the battery potential; The load obtains a relatively stable voltage from both ends of the battery pack. PWM solar controller can solve the problem of battery dissatisfaction, MPPT tracking efficiency of 75 ~ 80%, but the solar panels are still not fully utilized.

Solar MPPT charge controller is the third generation technology, is now the most high-end solar controller, the current use is relatively little, but very hot in the industry. MPPT solar controller, referring to the “maximum power point tracking” function, is the upgrading of PWM solar controller. The MPPT solar controller can detect the voltage and current of the solar panel in real time, and continuously track the maximum power (P=U*I), so that the system can always charge the battery with the maximum power. The tracking efficiency of MPPT is 99%, and the efficiency of the whole system is up to 97%, and the battery charging phase can be divided into MPPT charging, constant voltage equalizing charging and constant voltage floating charging.

In theory, the efficiency of the solar power generation system using MPPT controller will be 50% higher than the efficiency of solar controller using traditional one, but in the test, there is the impact of the surrounding environment and a variety of energy loss, though the efficiency did not reach the theoretical value, but also can improve 20%-30%. As the promotion of photovoltaic technology , coupled with energy saving and cost saving concept, I believe there will be more and more people in the industry tend to MPPT solar controller.

Power supply and distribution system as an important part of the information system, the basic requirement is that the system must be able to work continuously. In order to achieve the purpose of continuous work, the first is that the system should have high reliability, and secondly the system must be able to quickly repair. If it can not be repaired quickly , you may face second failures leading to the risk of paralysis of the entire system, can not guarantee the load continuous work.

In terms of rapid repair, modular UPS has a natural advantage. First of all, in the repair time, due to the characteristics of quick plug, modular UPS can complete the replacement at the scene, the average repair time in half an hour, compared to the traditional tower UPS for repair time of 24 hours, the repair speed improved significantly. Secondly, in the repair quality, repair the modular uninterruptible power supply through the fault module replacement, while the traditional tower UPS need factory to send professional engineers to the locale to locate the fault and repair the fault circuit board and disassemble, the repair cycle is long, and exist the process of communication and positioning, easily lead to repetitive work, affecting the efficiency of fault handling.

Some users may doubt that the N+1 structure of modular UPS is not as stable as the 1+1 system. Indeed, theoretically, the reliability of the 1+1 system must be the highest in the N+1 systems. But factly it is often not so simple:

First of all, this conclusion ignores the load rate, as 1+1 system, only allows one UPS down; while for the modular UPS system, taking 4+1 as example, the reliability is lower than that of 1+1 system when 100% load, but when 75% load rate, modular system becomes a 3+2, then a 2+3 when 50%, the reliability is much larger than the 1+1 system. In the common application situation, the UPS load rate is about 20~40%, in this case the modular has a very obvious advantage.

Secondly, different from the traditional single UPS, modular UPS can easily achieve the redundancy mode such as N+2, N+3, which only need to add 1-2 modules. But if tower type UPS need to achieve this mode, should not only increase 1 hosts, but also transportation, site installation, machine alignment design and the corresponding distribution, the battery needs to change, resulting in a substantial increase in investment.

In summary, the reliability of UPS modulares in the application is much higher than the traditional tower UPS; coupled with the characteristics of rapid maintenance and expansion of UPS, the availability of modular UPS is much higher than the traditional tower UPS.