In China, photovoltaic power stations have been constructed in batches since 2010. At this time, there are few domestic series inverter suppliers and the technology is immature, while the price of foreign products is very high.

The system cost of using a series inverter in large ground power stations is much higher than that of using the centralized inverter, which makes a centralized inverter the first choice for ground power stations, As a result, the centralized inverter occupies an absolutely dominant position in China’s ground power plants. The majority of photovoltaic practitioners are not familiar with a series inverter, and there are still misunderstandings in understanding, mainly including the following points:

1. Is the power generation monitoring data of the photovoltaic grid-connected system the same as the metering data of the grid two-way electricity meter? How big is the error?

The power generation monitoring data of distributed photovoltaic grid-connected system and the metering data of electricity meter are not necessarily the same. If the same electricity metering equipment is used at the same parallel node and the accuracy is exactly the same, the data obtained should be the same.

Why is it difficult to shake the mainstream position of 166 photovoltaic modules in the distributed market?

Since its listing, 166 photovoltaic modules have rapidly occupied the distributed market with their advantages of flexibility, lightness, high efficiency and steady income. At present, it has become the mainstream of photovoltaic module selection in the distributed field.

1. What are the common faults of distributed photovoltaic power generation systems? What typical problems may occur in each component of the system?

The inverter cannot work and start-up because the voltage does not reach the start-up set value, and the power generation is low due to photovoltaic modules or inverters. Typical problems that may occur in system components include the burning of the junction boxes and the local burning of photovoltaic modules.

BIPV, namely photovoltaic building integration.

BIPV is a technology that integrates solar photovoltaic power generation products into buildings and uses idle building roofs (including industrial plants, shopping malls, public buildings, etc.) and ancillary sites to build distributed photovoltaic power generation projects.

While producing clean electric energy, it also plays a role in thermal insulation and reducing energy consumption for buildings, which has good economic and social benefits.

Compared with the whole solar cell, the trend of half solar cell is obvious. The most popular explanation is that the current of half solar cell is only half of the original, so the power loss is low.

However, the advantage of half-cell technology is far more than power loss. This article will use the most popular explanation to tell you why half solar cell technology will replace the whole solar cell technology in the future.

Why is there a deviation in the color of solar panels? This question once puzzled not only photovoltaic people, but also many users who installed photovoltaic power generation systems. I don’t know whether it will affect the use. Next, we will answer this question for you. Why are there color differences in photovoltaic cells?

In fact, the color of solar cells is mainly affected by velvet, including flower chips, red chips.

The red sheet is mainly caused by the low corrosion of cashmere making. If the flocking corrosion is less than 3, the damaged layer of the silicon wafer will not be removed completely, resulting in the overall red color after PE coating.

Use solar power to supply daily household electricity; Grid-connected power generation, selling excess electricity to the state in exchange for income. Home solar power generation system saves money and is environmentally friendly, which makes many families eager to try.

But the ideal is always beautiful. The reality is that many people are deterred by their inner confusion and insecurity when facing the last step – installation.

1. Test conditions of solar cell array

Since the output power of the solar cell module depends on the solar irradiance, the distribution of the solar spectrum and the temperature of the solar cell, the measurement of the solar cell module shall be carried out under standard conditions (STC).

The measurement conditions are defined as Standard No. 101 by the European Commission, and the surface temperature of the solar cell panel is set at 25 ℃, The test under the condition that the solar radiation intensity is 1000W / ㎡ is called the standard test state.

1. Installation of solar cell module

Firstly, the solar cell modules are transported to the channel between the rows or columns where the solar cell array is installed, in order to speed up the installation speed of the construction personnel.

During transportation, it shall be noted that the solar cell modules shall not be stacked too high. During the transportation and storage of solar cell modules, they shall be handled with care, without strong impact and vibration, transverse heavy pressure and collision. Special attention shall be paid to prevent the backplate materials on the glass surface and back of solar cell modules from being directly impacted by hard objects.