Ridder's SOLAR BVBA Solar Photovoltaic (PV) System
RIDDERS-SOLAR, always a step closer to perfection!
 
THIN FILM PHOTOVOLTAIC
Photovoltaic technology makes use of the abundant energy in the sun, and it has little impact on our environment. Photovoltaic can be used in a wide range of products, from small consumer items to large commercial solar electric systems.
Crystalline is the most widely used raw material for solar cell mass production, normally, it include mono crystalline and poly crystalline. At this moment, crystalline solar cell share roughly 90% of the whole solar cell market. Regards to thin film solar cell, widely used semi conduction material will be thin film silicon, CIS and CdTe. Regards to CIS(simplicity of copper indium selenium) solar cell, the usage of singularity material indium cause a high cost for mass production. In additional, the process for CIS solar cell production is very complex, which make it very difficult for mass production. Now, this technology is not mature enough for mass production. Regards to CdTe solar cell, the usage of Cadmium, which have been proved a cancer making material, make it unconformity with “Green” energy. In additional, Tellurium is a very expensive material for mass production. Compare to CIS and CdTe technology, thin film silicon solar cell is a qualified technology for mass production.
 
 
THIN FILM Features
 
Crystalline silicon photovoltaic modules lose some power-generating capability with rises in temperatures. But thin film silicon photovoltaic modules generate higher power during summer time. Thin film silicon photovoltaic modules can deliver maximum performance during summer when the electricity is needed most for air-conditioners in houses and offices due to following characteristic
  • Low temperature coefficient: Normally, the electricity performance of photovoltaic module is measured by STC standard. Which include strong sunlight(1000 W sunlight per square meter, 1.5 A solar spectrum distributing) and 250c solar cell temperature. However, the temperature of solar module, operating in the sun, can be higher than atmosphere temperature 280c. The temperature of solar module, which installed at the roof of building, can be even higher. It is not unusual for the temperature of solar module to achieve 550c. In this case, the temperature coefficient is a very important parameter due to various solar cell technology. The temperature coefficient is always minus. With the temperature increase, module power will decrease accordingly. Temperature coefficient for thin film silicon solar cell is -0.2%/0c, and that of crystalline solar cell is -0.5%/0c. That means, when the module is worked on 500c condition, compare to the efficiency reached on 250c test standard , thin film silicon solar module will loose around 5%, and the loss for crystalline will be around 12.5%. In conclusion, even the STC efficiency of thin film silicon solar cell is low, the efficiency in actual operation condition is not far away to that of crystalline solar cell.
  • Good weak light performance: The performance of thin film silicon solar cell is better than that of crystalline solar cell in the weak light condition. Normally, installed module worked in a strong light of 1000 watt per square meter is very few. Ideally, output power of solar module should be the direct portion of the intensity of sunlight. And thin film silicon solar cell has such characteristic, however crystalline don’t. With a situation of sunlight of 200 watt per square meter, output power of crystalline solar module is around 85% of it should be. That means solar power system with crystalline solar module will not generate power in the late afternoon. However, solar power system with thin film silicon solar cell still generates power. Furthermore, thin film silicon has gentle current-voltage curve. This characteristic makes it easier to pick-up the most electricity power
 
HOW THIN FILM IS MADE?
 
Hydrogen sulfide thin film silicon is the semi conductor material for the transformation from solar light to electricity in thin film solar cell. Typical hydrogen sulfide thin film silicon solar cell construction is shown as following drawing:
We can see from the drawing, hydrogen sulfide thin film silicon is nipped between a textured SnO2 film(TCO film) and back contact. And all of these films are deposited on a glass substrate. hydrogen sulfide thin film silicon include 2 PIN conjunction, total 6 layer thin films. P layer works as the negative electrode, N layer as positive electrode and I layer works as the absorbing layer. Actually, the whole PIN conjunction is a semi conduction diode. The absorbed photon in the I layer activate one electron from one energy level to another, which will produce an activated electron and an ion with positive electricity. With the effect of internal electric field, ion will move to P layer and electron will move to N layer, which will form the voltage. And positive electrode connect with SnO2 layer and negative electrode connect with back contact. These 2 PIN/PIN conjunctions connect in series to increase the voltage.
The solar cells in one glass connect in series by laser scribing technology to increase the voltage of the whole module. The single-piece-integration process avoids mass handling and interlinkage, which is necessary for crystalline silicon solar cell. The voltage will come out from the whole module, and current can be extracted by a metal foil which connects with the first and last solar cell.
Module assembly drawing is as following.
 
 
Back plate material can be glass, plastic and metal sheet.
The process route for thin film silicon solar cell has been confirmed by mass production. The absorbing thin film silicon layer will be deposited onto TCO coated glass in a state-or-art in-line PECVD machine with a certain temperature. We can minimize the cross contamination, deposition time and increase the film uniformity in our big size substrate. The usage of micromorphous silicon layer in our process increases our transfer efficiency and minimizes the degradation of solar cell. Detail process route is as following:
 
MICROMORPHOUS TECHNOLOGY
   
In addition to the amorphous cell, the micromorphous cell has a tandem structure with an additional microcrystalline absorber. This layer converts the energy of the red and near infrared spectrum, allowing an efficiency increase of approximately 30%.
micromorphous cell
cross-section
 
FRAMED THIN FILM MODULES
RIDDER’S Solar offers top quality thin film solar panels, guaranteeing a highest performance and cost efficiency by
  • Working with its suppliers to select the best components and processes;
  • Continuously improving and optimizing all aspects of the manufacturing;
  • Continually investing in R&D to further enhance the product performance.
RIDDER’S Solar products include framed, frameless and see-through thin film solar module, which can be widely applied in ground mounted solar power plant, commercial roof systems, residential roof, BIPV buildings and etc.
Applications
Thin film silicon solar modules are widely used for free land mounted solar power plants, commercial roof systems and residential roof system. Thin film silicon solar system’s energy yield per Wp can be 10% higher than that of crystalline silicon solar system due to material’s characteristic.
Certification
Strictly designed and manufactured according to IEC 61646 & 61730 and UL 1703 standard in a ISO 9001 certified factory. Has been certified by TUV. UL certification is pending.
Guarantee------Declaration of warranty
  • Product Warranty: Free from defects in materials and workmanship for 2 years;
  • Power Warranty:
    • Maintain more than 90% of maximum power for 10 years;
    • Maintain more than 80% of maximum power for 20 years.
RIDDERS Solar FRAMED series thin film solar module guarantees the highest performance and cost efficiency. From the selection of materials including TCO glass, EVA, back sheet, aluminum frame, junction box to optimizing all aspects of the manufacturing and quality control processes, Framed thin film solar modules are designed and manufactured for highest performance with a reasonable cost.
Main Features
RIDDER’S Solar framed thin film solar module has following features:
  • Highest power output for framed thin film silicon solar modules.
  • More than 30% lighter than double glass thin film solar modules.
  • Made from nontoxic materials, no need to concern about the harmful gas emission or material decomposition in the whole life of solar modules.
  • Technology delivers high energy yield per rated Wp, owing to a low temperature coefficient and excellent weak light performance.
  • Anodized aluminum frames resist high wind and snow loads, together with preinstalled cables ensuring a quick and easy installation.
  • A back sheet with drainage holes eliminates the risk of accumulation of rain water or snow inside the frame.
  • Advanced encapsulation process ensures a high resistance against UV, temperature and weather.
  • State-of-art production process and qualified raw materials guarantee both top quality and safety.
 
FRAMELESS THIN FILM MODULES
 
RSG series thin film solar modules are packaged in a laminated glass/glass structure, fully autoclaved for added structural stability. RSG can be widely used for BIPV buildings, solar power plants and etc.
Main Features
RIDDERS Solar RSG thin film solar module has following features:
  • High reliability frameless glass-to-glass thin film silicon solar module;
  • RSG technology delivers high energy yield per rated Wp owing to a low temperature coefficient and excellent weak light performance;
  • Made from nontoxic materials, no need to concern about the harmful gas emission or material decomposition in the whole life of solar modules;
  • Optional bonded back rails (required for installation);
  • Advanced encapsulation ensures a high resistance against UV, temperature and weather;
  • Start-of-art production process and qualified raw materials ensure the top quality and safety.
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