EKT-PV Series Photovoltaic Module(550W-700W)

Descriptions:

EKT-PV Series photovoltaic modules, also known as solar panels, are the most important components in solar power generation systems. A complete photovoltaic module is composed of dozens of solar cells, junction boxes and frames. Since single solar cells cannot be used directly as power sources, if you want to use them as power sources, you must connect several single cells in series or parallel and tightly seal them into modules.

EKT-PV Series(550W-700W)Parameters

How solar panels generate electricity:

Sunlight shines on the semiconductor p-n junction of the photovoltaic cell, forming new hole-electron pairs. Under the action of the p-n junction electric field, holes flow from the p region to the n region, and electrons flow from the n region to the p region. When the circuit is connected, current is formed. Its function is to convert solar energy into electrical energy and send it to the battery for storage, or to drive the load to work.

Three types of solar cell technologies

1. Crystalline silicon solar cell technology, there are differences between monocrystalline silicon and polycrystalline silicon. The advantage is that the photoelectric conversion rate is high, the conversion rate can reach more than 21%, and the disadvantage is that the price is relatively expensive. Crystalline silicon solar cell technology is the mainstream technology in the current market.
2. Thin-film solar cell technology, the advantage is that the material usage is small and the price is low. The major disadvantage is that the photoelectric conversion rate is only half of that of crystalline silicon, but the conversion efficiency is only 6%-10%, so the market share has always been very low.
3. New solar cell technology, the advantage is high conversion rate and low cost. Perovskite photovoltaic cells are a new type of solar cell product that is expected to be mass-produced the fastest. The theoretical efficiency limit of single-junction perovskite cells can reach 33%, which is higher than that of crystalline silicon cells and thin-film cells. However, the biggest disadvantage of perovskite photovoltaic cells is that the efficiency attenuation is relatively serious. It will not be used on a large scale until the efficiency attenuation technology is solved.

Polycrystalline silicon photovoltaic modules and monocrystalline silicon solar modules

• Polycrystalline silicon photovoltaic modules: photovoltaic modules processed from polycrystalline silicon wafers. Polycrystalline silicon is manufactured using polycrystalline silicon block materials using the ingot casting process (square silicon ingots).
• Monocrystalline silicon photovoltaic modules: photovoltaic modules processed from monocrystalline silicon wafers. Monocrystalline silicon is manufactured using polycrystalline silicon block materials using the rod drawing process (round silicon rods).

P-type photovoltaic modules and N-type photovoltaic modules

1. P-type photovoltaic modules: photovoltaic modules assembled with P-type solar cells. P-type solar cells are silicon wafers into which the trivalent element "boron" is infiltrated during the cell doping process, and the element "gallium" can also be added. The conversion rate of P-type photovoltaic modules has been mass-produced in 2023, and the conversion rate is about 21.1% to 21.5%.
2. N-type photovoltaic modules: photovoltaic modules assembled with N-type solar cells. N-type solar cells are silicon wafers into which the pentavalent element "phosphorus" is infiltrated during the cell doping process, and the element "arsenic" can also be added. The conversion rate of N-type photovoltaic modules has been mass-produced in 2023, and the conversion rate is about 22.1% to 22.5%.

Types of photovoltaic module structure processes

1. Half-cell structure process: Cut a cell into two pieces and then assemble them into a photovoltaic module.
2. Shingled structure process: Cut a cell into five to six long pieces, and then use conductive glue to overlap the edges of multiple small cells to assemble a photovoltaic module.
3. Flexible module process: Flexible modules are also called lightweight modules. Photovoltaic modules can be bent and are particularly suitable for installation on curved roofs. One solution is to use flexible panels instead of glass panels based on the shingled photovoltaic module process. Another solution is to use thin-film batteries to make flexible photovoltaic modules.

Solar cell size classification

(I) Introduction to 182-size and 210-size cells

• 182 photovoltaic module lineup manufacturers: photovoltaic modules with a single cell size of 182 (182mm*182mm).
• 210 photovoltaic module lineup manufacturers: photovoltaic modules with a single cell size of 210 (210mm*210mm).

(II) Introduction to rectangular photovoltaic module size and cells

• Rectangular photovoltaic module size: On July 7, 2023, 9 domestic photovoltaic module manufacturers reached a consensus to unify the size of rectangular photovoltaic modules to 2382mm*1134mm.
• Rectangular solar cell size: On August 8, 2023, 6 domestic photovoltaic module manufacturers reached a consensus to unify the size of rectangular solar cells to 182.2mm*191.6mm.

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