Solar Polycrystalline Panels (25W-35W)

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Solar Polycrystalline Panels (25W-35W)

Introduction of Solar Polycrystalline Panels  (25W-35W)

Solar polycrystalline panels is designed for large electrical power requirements. It is the optimal choice for both on-grid and off-grid power systems. CNBM Solar panel offers high performance of power per square foot of solar array.Poly- or multicrystalline silicon(poly-Si or mc-Si): made from cast square ingots — large blocks of molten silicon carefully cooled and solidified. Poly-Si cells are less expensive to produce than single crystal silicon cells, but are less efficient. US DOE data shows that there were a higher number of multicrystalline sales than monocrystalline silicon sales.


Characteristics of Solar Polycrystalline Panels (25W-35W)

I Solar Cell : High efficiency crystalline solar cell. Even if under the weak light, the solar module can produce maximum power output.

II Tempered glass (toughened glass): Anti-reflecting coating and high transmission rate glass increase the power output and mechanical strength of solar module.

III EVA and TPT: Using high quality EVA and TPT to prevent destroying and water.

IV AI frame: Without screw, corner connection. 6 holes on the frame can be installed easily.

V Junction box: Multi function junction box with water proof.

VI Long lifetime: ≥25 years; Less power decrease.

VII Good performance of preventing from atrocious weather such as wind and hails.

VIII Resisting moisture and etching effectively, not effected by geology. .


Standard Test Conditions of Solar Polycrystalline Panels (25W-35W)

The opto-electrical specifications shown below are stabilized values being measured at Standard Test Conditions of multicrystalline silicon Solar Panel, Irradiance: 1000W/m2, Spectrum: AM1.5 at 25°C, The info below is subject to manufacturing tolerances. Where appropriate minutes of measurement are available and are used for the dimensioning of the installation.


Advantages of Solar Polycrystalline Panels (25W-35W)

• CNBM Solar performance guarantees for 25 years

• 2 years guarantee for workmanship for multicrystalline silicon Solar Panel

• Timeliness of delivery

CNBM International Corporation's products including Monocrystalline Solar Panel, Polycrystalline Solar Panel ( multicrystalline silicon Solar Panel) have received and enjoyed famous reputation in many countries and regions in the world .As a solar panel manufacturer in China, we strive to provide our customers with excellent service, superior products and unmatched value. 


Characteristics  of Solar Polycrystalline Panels  (25W-35W)

Max Power Voltage Vmp (V)




Max Power Current Imp (A)




Open Circuit Voltage Voc (V)




Short Circuit Current Isc (A)




Max Power Pm (W)





Temperature Coefficient of Cells



Temperature Coefficients of Isc (%/℃)


Temperature Coefficients of Voc (%/℃)


Temperature Coefficients of Pmp (%/℃)


 The dimension of the modules can be changed according to the demand of clients



Operating Temperature

–40 °C to +85°C

Storage Temperature

–40 °C to +85°C

Max System Voltage



Guarantee of Solar Polycrystalline Panels (25W-35W)

Products Guarantee

2 yrs free from defects in materials and workmanship

Performance Guarantee

No less than 90% within 10yrs and no less than 80% within 20yrs




The Equipment of Solar Polycrystalline Panels (25W-35W)

Solar Polycrystalline Panels (25W-35W)


The usage of Solar Polycrystalline Panels

Solar Polycrystalline Panels (25W-35W)


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Q:rooftop pool solar panel leaks?
Depending on the material and operating temperature of the panel, it MAY be possible to fix it very simply and easily by applying Hot Glue Gun adhesive over the cracked area. The high temperature glue gun adhesive melts at approximately 60 degrees Farenheit, and if the collector temperature does not quite reach, or exceed that operating temperature, then that repair method should work. Another possibility is an aerosol spray can product called LeakEnder. This is usually available at your local hardware store, or the major home improvement centers [like Lowe's, Sutherland's, Home Depot, McCoy's, etc.]. After preparing the area to be patched by cleaning, you just spray the LeakEnder patching material on the crack and an eighth of an inch or so around. IF the operating pressure or the collector is very low, it MAY even be possible to patch the leak with nothing more than a narrow strip of DUCT TAPE!!!!! Another possibility, but unless carefully accomplished is to weld the crack with a Soldering Gun and some scrap plastic from packaging material. The problem with this fix is that you must be very experienced in application of heat from the Soldering Gun, OR you will melt a larger hole in the collector tube than the crack was. Regardless of patching method, it is CRITICAL that the cracked area to be patched MUST be CLEAN and DRY BEFORE applying any patching material. Good luck!
Q:what kind of rays are used in solar panels?
Ultra Violet rays from the sun.
Q:Are our scientists making solar panels all wrong??
There are two basic types of solar panels. ) Thermal absorbers 2) Photovoltaics Thermal absorbers are black in order to convert sunlight to thermal (heat) energy. The whole idea is to capture all of the light with a dark surface, convert it to thermal energy and transfer the energy into your home for water heating or space heating. If you make the surface white or reflective, then the surface will absorb only a small fraction of the available light, hence the efficiency will be very low. In other words, the panel will not produce any heat. Photovoltaic panels produce electricity instead of heat energy. Photovoltaic panels are made from thin slices (“waffers”) of silicon with special coatings on the front and back surface. One of these coatings on the front is an antireflection coating to capture the light and channel it toward the silicon. Underneath the antireflection coating the silicon waffer is coated with other chemicals that convert the sunlight to electricity. The combination of these coatings gives the panel a dark color, usually blue or black. Here's the bottom line. If you want thermal heat or electricity from solar panels, the panels have to capture the light. When that light is captured, the surface appears dark because no light (or very little) light is reflected back to our eyes. It is not possible for a surface to be an efficient absorber, capturing all available light, and at the same time appear white or bright color or reflective to our eyes.
Q:How much energy does it take to make, install, and eventually dispose of a solar panel?
The attached link is to an article from the 200 Home Power magazine. In that article the energy payback was found to be between 2 and 4 years. Newer panels are more efficient primarily because the silicon wafers used today are thinner. The silicon cell embodies most of the energy required to make a solar panel. Today most solar panels will produce the amount of energy required to manufacture them in between about 9 months and 2 years depending upon the specific technology used to make it. Solar panels are expected to produce energy for between 30 and 50 years. Therefore it takes around 5% of their total energy production to produce them. Note that these figures depend upon where the panels are installed. Panels in very sunny areas may generate more than 3 times the energy of panels in a cloudier area. Edit - The energy payback meta-study that carbonates references below mention one particular study Alsema (2000), which the authors used as a baseline to come up with their 4 year payback figure. These studies DO NOT assume ideal conditions. The Alsema study assumes an annual an irradiation of 700 kWh/m2/yr. That is the United States average irradiation and does take into account cloudy weather and the like. Under idea conditions the amount of energy collected can be almost twice as much. Albuquerque New Mexico is an example. The figures I mentioned above are recent values reported by several different panel manufacturers with whom I discussed the issue at the 2006 IEEE 4th World Conference on Photovoltaic Energy Conversion held this May. The very long payback times that carbonate highlights are almost certainly wrong. The study he references concludes that paybacks range between 2 and 8 years with 4 years being the most likely. In my opinion payback times are actually a fair bit shorter based on conversations with the manufacturers.
Q:Questions about charging batteries via solar panel...?
You did not give the AH rate from your 24V battery pack,therefore , unable to suggest a correct current rate solar panel. The solar panel open voltage rate at least 30V to charge a 24V cell. No harm to controller since the charging current is so small even bike is in running condition.
Q:advice what solar panels to purchase?
Selecting the right solar panels is like shopping for a car. Shop around and compare prices. Make sure the frame material will not rust or corrode away after a few years if you are near the ocean. Talk to satisfied customers is always wise. Get the guarantee in writing.
Q:Solar panels and your opinion?
You ask a great question, because this should really be a financial decision, and not only an environmental one. Depending on which state you live in, the payback on a system is often in the 5 to 2 year range. The great thing about solar panels is that the fuel source is free and you don't need to speculate on your future costs. You pay for the equipment up front, and then you just enjoy the free power. Most solar panel systems last at least 30 years, so compare the cost of solar panels to paying your average electric bill 360 times. And that does not include any inflation of energy cost increase. Check out our website to learn more.
Q:What is the main material for making solar panels?
The correct name of solar panels is solar photovoltaic panels, making its main material is monocrystalline silicon or polysilicon silicon, monocrystalline silicon silicon chip more crystalline silicon wafer photoelectric conversion rate is high, the price is also more expensive silicon wafer.
Q:Solar Panel Voltage Question?
Hmmm (8v -7v)/ 0 ohms .... shakes head....
Q:Do I only need solar panels to have energy in day and through the night?
You can energize your home with a solar panel system if it sized correctly and if you have sufficient space for the panels oriented in the correct position. The solar panels will not provide your power directly since most of the devices we use are AC. The system will include and inverter for conversion from DC to AC. It will also include batteries to store your daytime energy for your nighttime use. If considering a solar panel system look and the references below and don't forget to do a home energy audit first to minimize your electrical needs so you can invest in a smaller system. I would also recommend incorporating solar hot water heating system, separate from solar panels. This will also minimize the amount of solar panels you will need.

1. Manufacturer Overview

Location Jiangsu, China
Year Established 2004
Annual Output Value Below US$1 Million
Main Markets Australia;Asia;South East Asia; South America;North America; Europe;Africa
Company Certifications ISO 9001:2008; CE; TUV; UL

2. Manufacturer Certificates

a) Certification Name  
Validity Period  

3. Manufacturer Capability

a)Trade Capacity  
Nearest Port Shanghai
Export Percentage 1% - 10%
No.of Employees in Trade Department 200-300 People
Language Spoken: English;Chinese
b)Factory Information  
Factory Size: Above 8,000 Square meter
No. of Production Lines 6
Contract Manufacturing OEM Service Offered;Design Service Offered
Product Price Range Average