Solar Power Systems

Everyone knows that when installing a **photovoltaic power station**, the installer will adjust the direction and install it with the best inclination. So do you know why you want to do this? Let's take a look with the editor below.

**1. What is the best angle of inclination?**

In a narrow sense, if the total amount of radiation received by the photovoltaic arrays fixed on a slope with a lower inclination angle is the largest each year, the inclination angle is called the optimal inclination angle. The optimal inclination angle can also be the highest annual power generation, the inclination corresponding to the highest output, the inclination corresponding to the highest power generation in a few months, and the best inclination calculated under various other restrictive conditions.

**2. Why do we need the best angle of inclination?**

In order to receive more solar radiation, it is necessary to obtain an optimal inclination angle from the annual radiation reception, that is, the optimal inclination angle.

**3. How to calculate the best inclination angle?**

According to the radiation data, the latitude and longitude calculate and accumulate the annual total radiation received by the photovoltaic array with different inclination angles, and the maximum inclination angle of the annual total radiation is selected as the best inclination angle.

**4. What are the main factors that affect the optimal inclination angle?**

The main factors affecting the optimal inclination angle include: (1) Latitude and latitude will affect the variation characteristics of the solar altitude angle, thereby affecting the optimal inclination angle; (2) Monthly radiation distribution. If more, the optimal inclination angle will increase, and vice versa; (3) Direct radiation has directivity, while scattered radiation will decrease. The radiation is isotropic, so their respective proportions in the total radiation also have a certain influence on the optimal inclination angle.

**5. Does the photovoltaic power station produce the maximum power at the optimal tilt angle?**

For the narrow optimal inclination angle, in accordance with the order of the "Photovoltaic Power Plant Design Specification", the optimal inclination angle is determined first (the mutual shielding between the arrays is not considered at this time), and then the north-south distance of the optimal inclination angle is determined. Determine the photovoltaic array based on the inclination angle. When the distance is determined, shadows will appear between the front and rear photovoltaic arrays. At this time, the radiation of the slope and the power generation of the power station will be affected by the distance. Since the inclination angle and the inclination angle are determined dynamically, there will be a slight difference between the inclination angle of the maximum power generation and the optimal inclination angle, but unless there are other restrictions, the difference between the two will not be too great.

**6. Is the profit of the photovoltaic power plant at the optimal inclination angle the highest?**

The best inclination angle in the narrow sense is not, sometimes the best inclination angle less than a certain angle has a higher return. The best inclination angle means high radiation reception, but it also means a large area. For example, in a limited site area, as the optimal inclination angle decreases, the installed capacity will continue to increase. A lower tilt angle will reduce power generation, while a higher installed capacity will increase power generation. Therefore, it is necessary to make further technical and economic comparisons with external conditions to determine the final benefit at which inclination angle.

**7. Is the best tendency absolute?**

No, due to the uncertainty of the climate, the optimal inclination angle can only be called the relative optimal inclination angle based on historical data. First, different historical radiation data will lead to different optimal inclination angles. There is a certain difference between the optimal inclination angle calculated by the 10-year historical data and the 20-year historical data. Secondly, the historical average data is more likely to represent the local radiation characteristics, but it is not necessarily the best choice for a certain year.

I believe that after reading the above content, you will understand why the installation of photovoltaic power plants is based on the best angle of inclination. If you have any other questions, please consult.

In a narrow sense, if the total amount of radiation received by the photovoltaic arrays fixed on a slope with a lower inclination angle is the largest each year, the inclination angle is called the optimal inclination angle. The optimal inclination angle can also be the highest annual power generation, the inclination corresponding to the highest output, the inclination corresponding to the highest power generation in a few months, and the best inclination calculated under various other restrictive conditions.

In order to receive more solar radiation, it is necessary to obtain an optimal inclination angle from the annual radiation reception, that is, the optimal inclination angle.

According to the radiation data, the latitude and longitude calculate and accumulate the annual total radiation received by the photovoltaic array with different inclination angles, and the maximum inclination angle of the annual total radiation is selected as the best inclination angle.

The main factors affecting the optimal inclination angle include: (1) Latitude and latitude will affect the variation characteristics of the solar altitude angle, thereby affecting the optimal inclination angle; (2) Monthly radiation distribution. If more, the optimal inclination angle will increase, and vice versa; (3) Direct radiation has directivity, while scattered radiation will decrease. The radiation is isotropic, so their respective proportions in the total radiation also have a certain influence on the optimal inclination angle.

For the narrow optimal inclination angle, in accordance with the order of the "Photovoltaic Power Plant Design Specification", the optimal inclination angle is determined first (the mutual shielding between the arrays is not considered at this time), and then the north-south distance of the optimal inclination angle is determined. Determine the photovoltaic array based on the inclination angle. When the distance is determined, shadows will appear between the front and rear photovoltaic arrays. At this time, the radiation of the slope and the power generation of the power station will be affected by the distance. Since the inclination angle and the inclination angle are determined dynamically, there will be a slight difference between the inclination angle of the maximum power generation and the optimal inclination angle, but unless there are other restrictions, the difference between the two will not be too great.

The best inclination angle in the narrow sense is not, sometimes the best inclination angle less than a certain angle has a higher return. The best inclination angle means high radiation reception, but it also means a large area. For example, in a limited site area, as the optimal inclination angle decreases, the installed capacity will continue to increase. A lower tilt angle will reduce power generation, while a higher installed capacity will increase power generation. Therefore, it is necessary to make further technical and economic comparisons with external conditions to determine the final benefit at which inclination angle.

No, due to the uncertainty of the climate, the optimal inclination angle can only be called the relative optimal inclination angle based on historical data. First, different historical radiation data will lead to different optimal inclination angles. There is a certain difference between the optimal inclination angle calculated by the 10-year historical data and the 20-year historical data. Secondly, the historical average data is more likely to represent the local radiation characteristics, but it is not necessarily the best choice for a certain year.

I believe that after reading the above content, you will understand why the installation of photovoltaic power plants is based on the best angle of inclination. If you have any other questions, please consult.