2019年7月18日星期四

Whats monocrystalline and polycrystalline solar?

Monocrystalline silicon solar cells are mainly made of monocrystalline silicon. Compared with other types of solar cells, monocrystalline silicon cells have the highest conversion efficiency. In the early stage, monocrystalline silicon solar cells occupied the majority of the market share, only after 1998 to take second place to polysilicon market share.
after 2004 the market share of monocrystalline silicon rose slightly, and now the majority of the cells in the market have monocrystalline silicon. Silicon crystal of monocrystalline silicon solar cell is very perfect, its optical, electrical and mechanical properties are very uniform, the color of the battery is mostly black or dark, especially suitable for cutting into small pieces to make small consumer products. The conversion efficiency of monocrystalline silicon cells is 24.7% in the laboratory. The conversion efficiency of commercial silicon cells is 10%-18%.Due to manufacturing process problems, monocrystalline silicon solar cell is generally semi-silicon ingot into cylindrical feed, and then after slicing -> cleaning -> diffusion production -> removal electrode -> production electrode -> corrosion peripheral -> evaporation and reflection reduction film core made of finished products. Generally, the four corners of monocrystalline silicon solar cells are rounded corners. The thickness of monocrystalline silicon solar cells is generally 200uM-350uM thicken making polysilicon solar cells, the high purity silicon used as the raw material is not purified into a single crystal, but is melted and cast into square ingots, which are then processed and sliced like monocrystalline silicon for similar processing.
Polycrystalline from its surface is easy to recognize, silicon is composed of a large number of different sizes of crystallization area (surface crystal crystal), the generating mechanism and single crystal are the same, but because of the silicon wafer by multiple grain group in different size, different orientation, the grain interface photoelectric conversion are susceptible to interference, thus polysilicon conversion rate is relatively low, at the same time, optical, electrical, and mechanical properties of polycrystalline silicon monocrystalline silicon solar cells, good consistency. The maximum efficiency of polycrystalline silicon solar cell laboratory is 20.3%, and the commercial solar cells are generally 10%-16%. Polycrystalline silicon solar cells are square pieces, which have the highest filling rate when making solar modules, and the products are relatively beautiful. The thickness of polycrystalline silicon solar cells is generally 220uM-300uM thick, some manufacturers have produced 180uM thick solar cells, and to thin development, more to save expensive silicon materials.
Polycrystalline silicon solar cells
The article from:www.yiwugreenway.com

2019年7月9日星期二

Standing Seam Kilp Lok 406 Clamp

solar roof clamp 406 are design to match the metal sheet Klip Lok 406 without penetration to the roof.
Standing seam clamp 406

Material
Al 6005-T5
 AL 6063, AL 6003 available
Size
Klip Lok 406
Surface
Anodized, Black Electrophoresis.
Certification
ISO, SGS, Aluminum testing report.
Usage
Metal roof mounting bracket


*metal roof solar panel clamp 

 Quality: Anodizing layer ≥ 12 μm

Tensile Strength≥ 260N/MM2

Non-proportional elongation strength ≥ 240N/MM2

Elongation after break ≥8%

SGS, ISO approved

*solar mounting clamp Warranty:12 years with 25 years lifetime

*solar pv clamp Lead time: 7-15 days

*aluminum solar clamp Price: Factory direct, no extra costs

* aluminum solar roof clamp Quantity: Spare parts will be offered

* Production capacity: 4000000pcs/mon

* Service: OEM, ODM accepted

* Experience: 11 years as a manufacturer


HQ Mount located in Xiamen, China, is specialized in researching and developing, manufacturing, selling solar mounting system solutions.

Our products mainly include roof mount, grounding mount, solar carport, solar farm, floating solar and all mounting accessories.

We can customize solutions for specific projects, ODM and OEM are welcomed. HQ cooperated with several university and third-party testing institution, i.e., SGS, BV.

Lifepo4 48v 50ah 100ah 150ah 200ah Lithium Ion Batteries Storage For Sale

Lifepo4 48v 50ah 100ah 150ah 200ah Lithium Ion Batteries Storage for Sale
lithium battery



Key Features of Lithium Battery

1. Longest Cycle Life and Highest Reliability

2. High Energy Density

3. Low Self Discharge

4. Charging and Discharging in Shorter Time

Specifications of Lithium Battery

Model

Rated Volt

Capacity

Rated Power

Approx Weight

Dimension

Battery Cell

Box Material

Cycles

LFP12-3012.8V30Ah384.0WH3.8KG195*130*155mmCylindrical/PrismaticABS/PVC/IRON>2000@1000%DOD
LFP12-5012.8V50Ah640.0WH6KG239*132*205mmCylindrical/PrismaticABS/PVC/IRON>2000@1000%DOD
LFP12-10012.8V100Ah1280.0WH13KG329*172*214*243mmCylindrical/PrismaticABS/PVC/IRON>2000@1000%DOD
LFP12-15012.8V150Ah1920.0WH19KG483*170*240*240mmCylindrical/PrismaticABS/PVC/IRON>2000@1000%DOD
LFP12-20012.8V200Ah2560.0WH27KG522*240*219*244mmCylindrical/PrismaticABS/PVC/IRON>2000@1000%DOD
LFP12-25012.8V250Ah3200.0WH31KG520*269*220*249mmCylindrical/PrismaticABS/PVC/IRON>2000@1000%DOD
LFP12-30012.8V300Ah3840.0WH38KG520*269*220*249mmCylindrical/PrismaticABS/PVC/IRON>2000@1000%DOD
LFP48-3048.1V30Ah1443.0WH10KG440*260*88mmCylindrical/PrismaticABS/PVC/IRON>2000@1000%DOD
LFP48-5048.1V50Ah2405.0WH16KG442*385*132mmCylindrical/PrismaticABS/PVC/IRON>2000@1000%DOD
LFP48-10048.1V100Ah4810.0WH35KG442*410*220mmCylindrical/PrismaticABS/PVC/IRON>2000@1000%DOD
LFP48-15048.1V150Ah7215.0WH48KG442*484*400mmCylindrical/PrismaticABS/PVC/IRON>2000@1000%DOD



Pictures of Lithium Battery
12.8v 50ah 100ah 300ah lithium iron batteries
Lithium battery 12v 48v 50ah 100ah 200ah 300ah


Projects of Lithium Battery
lithium battery for sale

Greensun provides energy storage batteries such as AGM, GEL, OPZV, OPZS, lithium

batteries, etc. The battery can be divided into 2V battery and 12V battery by voltage.

AGM and GEL batteries are maintenance-free, deep cycle and cost effective.
OPZV and OPZS batteries are usually available in 2V series and have a life span of 15 to 20 years.
Lithium batteries have high energy density, long life and light weight. The disadvantage is high price.
The above batteries are widely used in Solar Power Systems, Wind Energy Systems, UPS System(Uninterrupted Power Supply), Telecom Systems, Railway Systems, Switches and Control systems, Emergency Lighting Systems, , and Radio and Broadcasting Stations.

Greensun Solar Energy Tech. Co., Limited 
Greensun Head office
 Add: No 2000 Changjiang West Road, Shushan District Hefei China 
Tel: +86-158-5511-0194 
Whatsapp: + 86 187 1510 8506 
Fax: +86-551-6880 6668 
Email: manager@greensunpv.com

AC Deepwell Submersible Pump 4" 4ZD6

AC Submersible Pump 4ZD6

*MULTIFUNCTION FOR BOTH DRIVE BY AC AND SOLAR 
*INVERTER WITH MMPT FUNCTION AND DURABLE QUALITY
*WATER LEVEL SYSTEM FOR TANK FULL AND WELL DRY
*ENERGY SAVING, JUST NEED 10% HIGHER SOLAR 
  THAN PUMP POWER


Applications:
Water supply system
booster
Garden and farm irrigation
Lowering underground water level
Various industrial applications

Motor:
Adopted the NEMA standard
Insulation class: F
Protection grade: IP 68
Maximum diameter: Φ143mm
Highest tempera ture of liquid: 35 ℃

Specification:






Greenway Solar Energy Co., LTD), located in zhejiang china, the one stop supplier for solar irrigation and solar off grid home systems. Beside our own brand we are also sole agents of china top brands like Shimge pump, Shiyuan pump, Invt inverter.

Our main products are Solar Dc brush submersible pump, Solar Dc brushless submersible pump, AC 220V / 380V submersible pump, AC/DC solar water pump inverter, Solar home system, Mono and Poly new and china top brands Stock solar panels.

Solar First provides water proof solar carport system

Solar First provides optimum, high-quality and cost-effectiveness waterproof solar carport system solutions which is fast easy in installation and free in maintenance with long life span for more than 25 years. Solar carport system are ideally for residential homes, private villas, airports, schools, public units etc. for parking 1 to 100 cars with following benefits:

1.Full Aluminum structure+ full stainless steel fasteners
2.Optional anodizing surface: white, black, yellow, brown
3.Full water proof, no leaking.
4.Excellent in climatic adaptability and friendly in environment

Xiamen Solar First Energy Technology Co., Ltd. is an international high-tech enterprise which specializes in researching and developing, manufacturing, providing solar PV products in solar field for many years. With advanced technology and excellent service, Solar First devotes itself to offer the first-class solar mounting systems all over the world.

Solar First has developed a series of solar products, including solar PV ground mounting system, solar PV roof mounting system, solar light system and solar tracking system, etc. which have gotten international certifications like AS/NZS1170, TUV, CE, UL and ISO for approved as the leading structural design and performance. Furthermore, all of our products can be OEM customized.
waterproof solar carport system

2019年7月7日星期日

Household Solar System Installation Ⅰ

The household solar plant( also named as small-scaled distributed solar system) is found on rooftop usually. However, not all rooftop is suitable for installation. That’s why we need to consider specific condition based on the principle of economy.

Followed is some know-how about household solar system installation for your reference. 



Choosing Installation Site:
The best site for installing household PV is rooftop or open ground. What needs to be considered includes coverage, housing structure and bearing weight, ground condition and weather change. For example, the bearing weight of rooftop should be over 20kg/㎡. While the wooden beam should be excluded for its life span may be less than that of solar system, say 25 years.



Specific Rooftop Style
“人”Style Rooftop
When installing PV station on this rooftop, the tilt angle don’t need to be perfect and the shadowing must be considered. Usually, the bracket will be flattened facing the south and linked with the rooftop by using klip lok. Finally, the panels are installed on bracket. It will maximize the using coverage of rooftop and keep elaborate.



Flat Rooftop
Installing on flat rooftop need to take both the best tilt angle and panel distance under consideration.



Household Open Ground
When installing on household open ground, clients could choose ground screw or concreted bar as base depending on the earth condition and cost control, and designing the strength of bracket based on the weather condition.
Most importantly, the panel size may alter micro when temperature changes, so there should be 3 cm between panels.

Above are solar panel installation knowledge in different sites, next FOEN will tell you more about the choice of accessories some special design.


2019年5月15日星期三

Knowledge for Operating & Maintaining Solar Panels from Foenpv.com

 Article from Foenpv.com

1.Solar Panel De-dusting

At present, some photovoltaic power generation stations rely solely on natural actions such as rainfall and wind to remove the accumulated ash on panels. Some small photovoltaic power stations adopt manual cleaning methods, using mop, rubber scraper or soft cloth.

It is difficult to clean large and medium-sized photovoltaic power stations manually, so mechanical cleaning is generally adopted. One is High Pressure Water Gun Cleaning: the water is pressurized to form mixture of water and vapor, washing solar panels to be clean. Therefore, it is widely used in many photovoltaic power stations. There is also mechanical dust removal technology, using mechanized brush combined with automatic dust removal device for solar panels, and sweeping away the dust by mechanical force.

FOEN Aluminium Co., Ltd

FOEN's bracket system in Oman


2. Avoiding Shadows

Before the construction of solar aluminium bracket, it is necessary to do a good job in the early stage of exploration, to determine whether there will be shelter by the existing buildings (planned buildings should also be expected), high-voltage line, railing and vegetation, and to find a way to eliminate the shelter or shift the installation location.

Some people always want to do something for power station, such as installing fence, plugging bird repellent rod which would reduce the efficiency of panels. Some even put vegetables and clothings on panels, resulting block on stations.


FOEN's solar bracket system in Bahrain


3. Avoiding Hot Spot Effect

In order to avoid hot spot effect, the construction project department need to do a good job of technical disclosure before construction and strengthen random inspection of project quality during construction. Only in this way can the impact of hot spot effent on life span of module be reduced.

Protection measures during module production section include: controlling the reverse current of battery, minimizing the impurities inside battery, adopting parallel diode protection, etc.

Protection measures for application include: adopting batteries (or components) with good performance consistency, trying to ensure that components are not blocked during installation, cleaning in time when there is dirt on them, etc., so as to maintain a good power output of the solar system.