Be Careful of Cells / Panels Made in Zhejiang

Recently we've received some complains from Spain that they've got some panels shipped from Ningbo (a commercial city located in East Zhejiang Province of China). The panels are bad, regardless of their labels marked as A0 products. The cells have significent chromatic aberrations. The power output is not stable. 

Well, congratulations, you've got one of the infamous province's products. The province was, and is always famous for its pirated, cheap but bad quality products. Despite of some world famous factories in the province are still manufacturing good quality products, many smaller workshop do sell (mainly domestically) un-qualified products. 

So, please be aware, when you receive a very low price, from an unknown workshop in the province, do check the background of that company, and better fly over and check by yourself. Don't risk yourself. Although I am not accusing the whole province's industry, I do express my concern on the issues that may seriously poison the market. 

Processing Steps Of Thin-film Solar Cell

1) SUBSTRATE PREPARATION

TCO coated glass -> Glass edge trimmer

2) SUBSTRATE CLEANING

TCO coated glass -> Glass washer

3) CUTTING WITH LASER

TCO coated glass -> Laser Scriber (1st) -> TCO-coated glass after cutting

4) SUBSTRATE CLEANING AFTER LASER CUTTING

TCO coated glass -> Glass washer

5) PUTTING 48 PCS OF SUBSTRATES INTO THE BOX CARRIER

Gas box - Gas substrate - power ladder - box carrier

6) 

Box carrier -> Preheat Oven

7) DEPOSITION OF THIN-FILM SI

PECVD system for a: Si/uc-Si deposition

8) Substrates

Box carrier -> Cool down oven

9) Output the substrates

Box carrier -> Glass substrate coated with thin-film Si -> Gas box

10)  CUTTING OF THIN-FILM SI

Laser scriber (2nd green)

11) BACK ELECTRODE

Cell -> sputtering system for ZnO/Al, Ag deposition -> cell -> Laser scriber (3rd green) -> cell with thin-film

12) TESTING THE MODULE PERFORMANCE

Solar simulator

13) LAMINATION

Trays with modules EVA and backing plates -> Laminator

Solar Cells Manufacturing Process

The cells manufacturing process should be based on first-class solar cell manufacturing equipments. Factory workers combine the patented technology of intensive back surface field with proprietary research and development, which makes us a top level international manufacturer of solar cells and PV modules.

Advanced diffusion techniques are normally adopted, in order to ensure the homogeneity inside of the cells, and reduce the matched losses among the cells. Advanced PECVD film forming technique to plate the surface of the cells with a deep blue film of SiN anti-reflective coating, which results in a beautiful look of the uniform colour, is also needed.

By utilizing high quality metal size to make the back surface field and electrode, factory can ensure the good conductivity and reliable adhesion force and very good solderability of the electrode. The high accurate printing pattern makes the automatic soldering of the cells easy.

The careful and consistent handpicking of identical and high efficiency solar cells reduces the matched losses of the cells and enhances the power of modules. The use of durable aluminium frames make easy mounting possible and enhances the load capability of the modules.

Normally the R&D team sets up before the company established.

Solar Cells and Solar Systems

Solar cells are produced from raw silicon materials in a multistage process. Firstly raw quartzite sand is processed into bulk silicon, which is subsequently melted and formed into blocks or ‘ingots’. The ingots are cut and sliced to produce ‘wafers’ which form the basis of a solar cell. Solar cell manufacturers (such as Jetion) add electrodes to the wafer for electrical connectivity. The wafers are then cleaned and treated prior to their introduction into the manufacturing process.

Solar cells are usually mounted in large arrays known as ‘solar modules’ electrically interconnected and sealed under toughened glass to protect them from the weather. Solar modules, together with various system components such as batteries, charge controllers and inverters, form the basis of a complete solar power system.

Solar power systems can be connected to the electricity grid or used in isolated units, as ‘off-grid’ power. When electrical grid connection is possible, any excess electricity can be fed back into the system and sold. Off-grid systems are found where grid access is physically difficult or economically unattractive, such as portable, remote, off-shore locations or developing countries.

Solar Cells Sale In China

Today the Chinese Solar industry has seen rapid growth ever. According to 2007 Deep Research Report on China Solar cell industry，2006 China Solar Cell Shipment was 400.9 W，Increased 237.74% than 118.7MW in 2005，and reached 1021.5 MW in 2007 estimatively，increased 154.8% than 2006.

About the revenue: 2006 China Solar Cell revenue was 1251.4 Million USD，Increased 264.5% than 343.3 Million USD in 2005，and est. reached 3188.6 Million USD in 2007，increased 154.8% than 2006.

About utilization: the total solar cell utilization of China is 27.36 in 2005, 34.24% in 2006, about 41.61% in 2007, est. 76.99 in 2012; the low utilization during 2005 and 2006 mainly because the following two reasons: first, the expansion of solar cell manufacture capacity is fast; second, the shortage of solar cell raw material(wafer or polysilicon) is tremendous.

Solar Cells Blog

In this blog we dedicated to provide you with the updated information about the booming solar cell market.

Solar power generation technology is founded upon silicon, a common element that comprises approximately 25% of the earth’s crust by mass. When light falls on high purity silicon, the PV (photovoltaic) effect causes the release of electrons from the silicon atoms. When silicon is fashioned into a solar cell with collection electrodes, the PV effect generates an electrical current.

Solar cells are produced from raw silicon materials in a multistage process. Firstly raw quartzite sand is processed into bulk silicon, which is subsequently melted and formed into blocks or ‘ingots’. The ingots are cut and sliced to produce ‘wafers’ which form the basis of a solar cell. Solar cell manufacturers add electrodes to the wafer for electrical connectivity. The wafers are then cleaned and treated prior to their introduction into the manufacturing process.

The increased awareness on renewable energy and climate change has led to demand of solar power elements outstripping supply with Government subsidies and falling costs and prices continuing to support the industry growth. Many companies had already begun to produce massive solar cells to fulfill the thirsty market.