Solar panel as one of the most important components of the solar energy system. Its performance and quality play an important role in the whole solar system. We all know that a solar panel is a tool for converting solar energy into light energy, so its efficiency is a measure of the performance of that solar panel. With the development of technology, the efficiency of solar panels has been greatly improved and the maximum efficiency of solar panels has even reached 24%.
1.1 The Maxeon7, with an output of 445W, has the highest overall solar panel efficiency of 24.1%.
It has a temperature coefficient of -0.27%/°C. The lower the temperature coefficient, the higher the efficiency of its panels, as its efficiency does not decelerate as the temperature rises.
1.2 Longi Solar Hi-Mo6, with an output of 455W and a solar panel efficiency of 23.3%.
1.3 Trina Solar VertexS+, with an output power of 455W and a solar panel efficiency of 22.8%.
1.4 JinkoSolar N-type monocrystalline solar panel, with an output power of 490W and an efficiency of 22.71%.
It has a temperature coefficient of -0.29%/℃. The operating temperature can range from -40°C to +85°C.
1.5 Trina Solar TSM-NEG9R.28N type monocrystalline, with an output power of 450W and a solar panel efficiency of 22.5%. It has the lowest temperature coefficient up to -0.34%/°C.
1.6 JA Solar N-type bi-directional monocrystalline solar panel with 625W output power and 22.4% efficiency.
It has a minimum temperature coefficient of -0.3%/°C.
1.7 AT&S Solar N-type monocrystalline solar panel with an output power of 550W and an efficiency of 22.0%.
1.8 AT&S Solar TOPHiKu6 with an output of 470W and a solar panel efficiency of 23.2%.
The temperature coefficient is -0.29%.
1.9 Aixu Solar Nova Series, with an output power of 470W and a solar panel efficiency of 23.6%.
From the above data, it is easy to see that the efficiency of solar panels nowadays is already very high. The Maxeon7, in particular, has reached an efficiency of 24.1%. In fact, it recorded an efficiency of 24.9% in a lab setting. However, the solar panel will not be available outside Europe until the end of 2024.
The power rating of the solar panel also plays a decisive role in the performance of the solar panel, with the most powerful solar panel currently available having a power rating of 700W.
2.1 Monocrystalline solar panels: monocrystalline solar panels are made from a single silicon ingot, which has the highest efficiency of 19% to 22%. However, manufacturing monocrystalline solar panels requires a high temperature environment, which makes them more expensive to manufacture and more expensive to sell.
2.2 Polycrystalline solar panels: it is made from silicon wafers, it has an efficiency of 16%~18%, compared to monocrystalline solar panels, it is less efficient, but it is cheaper and is the preferred choice for most homeowners.
2.3 Thin-film solar panels: It is cheaper to manufacture, and compared to silicon solar panels, thin-film solar panels are thin and lightweight. However, it has a lower conversion efficiency of 11% to 14%. Its price is cheaper compared to silicon solar panels.
Nature of Solar Panel
3.1 Types of solar panels: The main types of solar substrates are P-type and N-type silicon. Different types of solar panels have different light absorption and charge transfer characteristics, which makes a difference in efficiency. n-type silicon panels are more efficient because n-type silicon substrates are highly pure and do not suffer from losses due to busbar shading.
3.2 Structural design of solar panels: the structural design of solar panels has an important impact on their efficiency. For example, the surface texture can increase the reflection and scattering of light, thus improving the efficiency of light absorption. The thickness of the panel etc. affects the charge transfer efficiency.
3.3 Power temperature coefficient: solar panels are extremely easy to exothermic when in use, is the efficiency of the solar panel decreases. And different solar panels have different temperature coefficients, in general, the lower the temperature coefficient, indicating that it is less susceptible to temperature rise efficiency decline, so the higher the efficiency of the solar panel.
3.31 Polycrystalline P-type cell: -0.39~0.43%/°C
3.32 Monocrystalline P-type cell: -0.35~0.40%/°C
3.33 Monocrystalline N-type IBC cell: -0.29~0.31%/°C
3.34 Monocrystalline N-type TOPcon:-0.29~0.32%/°C
3.35 Monocrystalline N-type HJT cell:-0.25~0.27%/°C
Post maintenance and installation:
3.4 In actual use, the efficiency of solar panels is often lower than the theoretical solar panel efficiency, this is because the efficiency of solar panels is also affected by post maintenance. Even if you buy a solar panel with high efficiency, but you don’t do a good job of maintenance and regular checkups, etc., its efficiency may drop.
3.5 The efficiency of solar panels is often affected by external factors, such as solar radiation, shadow area, dust and dirt, location, and so on.
Solar panels are becoming more and more efficient, making the whole solar system perform better. However, high efficiency solar panels often means more expensive, otherwise everyone would be installing high efficiency solar panels. If you have enough money to install high-efficiency solar panels, you do have the option of choosing more efficient solar panels, given the impact of solar panel efficiency on your quality of life.
If you don’t have too much money to spend on high-priced solar panels, then it’s not a bad idea to go for slightly less efficient solar panels. As long as you regularly maintain and check your solar panel, its efficiency can be effectively guaranteed.
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