• Polycrystalline Solar Panels for 20kw Rooftop Systems System 1
  • Polycrystalline Solar Panels for 20kw Rooftop Systems System 2
Polycrystalline Solar Panels for 20kw Rooftop Systems

Polycrystalline Solar Panels for 20kw Rooftop Systems

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Loading Port:
Tianjin
Payment Terms:
TT OR LC
Min Order Qty:
78000 watt
Supply Capability:
10000000 watt/month

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CNBM Polycrystalline Solar Panels for 20kw Rooftop Systems


Solar modules use light energy (photons) from the sun to generate electricity through the photovoltaic effect. The majority of modules use wafer-based crystalline silicon cells or thin-film cells based on cadmium telluride or silicon. The structural (load carrying) member of a module can either be the top layer or the back layer. Cells must also be protected from mechanical damage and moisture. Most solar modules are rigid, but semi-flexible ones are available, based on thin-film cells. These early solar modules were first used in space in 1958.


Polycrystalline Solar Panels for 20kw Rooftop Systems

Specifications:

Electrical connections are made in series to achieve a desired output voltage and/or in parallel to provide a desired current capability. The conducting wires that take the current off the modules may contain silver, copper or other non-magnetic conductive transition metals. The cells must be connected electrically to one another and to the rest of the system. Externally, popular terrestrial usage photovoltaic modules use MC3 (older) or MC4 connectors to facilitate easy weatherproof connections to the rest of the system.


solar panels from 5W--300W, made of TAIWAN MOTECH brand cells,with CO in TAIWAN,Mono and Poly with VDE,IEC,CSA,UL,CE,ISO.

We import solar cells from Taiwan Motech brand, with this CO in taiwan and our CSA certification,we can still sell goods to Anti-dumping areas like USA. Our main products are solar panels, off grid and on grid solar home systems , solar street lighting systems, solar water heating system,solar pump,solar attic fan, solar DC LED lights and solar DC refrigerators.

Certificates : ISO, CE, VDE IEC, MCS, CSA-UL, CEC.
Delivery time: sample 10days, order 25-30days.
Sample: charged.
Payment term: T/T 30% as deposit, 70% before shipment. Or irrevocable L/C at sight.
Trade term: FOB Shenzhen or CIF destination seaport or Airport.

Characteristics:

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.
IX.The certificate issued by international authority: UL, TUV, IEC, VDE, CE.
 

Quality and Safety

1. Rigorous quality control meets the highest international standards.

2. High-transmissivity low-iron tempered glass, strong aluminium frame.

3. Using UV-resistant silicon.

4. IS09001/14001/CE/TUV/UL  

Warranties

1. 10 years limited product warranty

2. 15 years at 90% of the minimal rated power output

3. 25 years at 80% of the minimal rated power output

Technical date :

ITEM NO.:

Poly 156*156 cell ,60pcs . Power range from   230Wp-260Wp

Maximum Power(W)

230

235

240

245

250

255

260

Optimum Power Voltage(Vmp)

29.4

29.5

29.7

30.1

30.3

30.5

30.7

Optimum Operatige Current(Imp)

7.83

7.97

8.08

8.14

8.25

8.37

8.48

Open Circuit Voltage(Voc)

36.7

36.8

36.9

37.1

37.3

37.5

37.7

Short Circuit Current(Isc)

8.52

8.59

8.62

8.65

8.69

8.73

8.78

Solar Cell:

156*156 Poly

Number of Cell(pcs)

6*10

Name of Solar Cells

Polycrystalline Cell

Size of Module(mm)

1650*992*40/45/50

Cable & Connector Type

Pass the TUV Certificate

Frame(Material Corners,etc.)

Aluminium-alloy

Back sheet

TPT

Weight Per Piece(KG)

19.5KG

FF (%)

70-76%

Junction Box Type

Pass the TUV Certificate

Tolerance Wattage(e.g.+/-5%)

±3%, or 0-3%

Front Glass Thickness(mm)

3.2

Temperature Coefficients of Isc(%)

+0.04

Temperature Coefficients of Voc(%)

-0.38

Temperature Coefficients of Pm(%)

-0.47

Temperature Coefficients of Im(%)

+0.04

Temperature Coefficients of Vm(%)

-0.38

Temperature Range

-40°C to +85°C

Surface Maximum Load Capacity

5400Pa

Allowable Hail Load

23m/s ,7.53g

Bypass Diode Rating(A)

12

Warranty

90% of 10 years, 80% of 25 years.

Standard Test Conditions

AM1.5   1000W/ 25 +/-2°C

Packing

carton or pallet

1*20'

14 Pallets / 316pcs

1*40'STD

25 Pallets / 700pcs

Polycrystalline Solar Panels for 20kw Rooftop Systems

Polycrystalline Solar Panels for 20kw Rooftop Systems



FAQ:

I..Will you focus on the safety of the goods during transportation?

Yes, Safety of the cargo is the primary element that we would consider on transportation.

II..How would guarantee the quality will meet the requirements of your clients?

Before shipment, we will have inspection for each batch of goods.

III..What certificates do you have?

IEC,UL,TUV,CSA,etc.

IV..Can you do OEM according to clients’ requirements?

Yes, we have our own brand while we can provide OEM service.


Q:Can solar panels be installed on electric fences?
Yes, solar panels can be installed on electric fences. Solar panels can provide the necessary power to energize the electric fence, making it a more sustainable and cost-effective solution.
Q:What is the average payback period for solar panels?
The average payback period for solar panels is typically around 7 to 10 years. However, this can vary depending on factors such as location, system size, local energy rates, and available incentives.
Q:Got a small project here in a remote location. There is to be a 2 volt deep cycle battery, the equipment to be powered from battery and solar panel to charge battery. The 2 volt battery puts out 55 AH. the max constant power draw from the equipment to be powered is 7.9 watts. Will a 30 watt panel at 2 volts be enough to run this system during sunlight and charge the battery for the equipment to run overnight?And, at 55 AH, how long can I keep a constant draw of 7.9 watts without a recharge?Thanks to all the input!
o work out the wattage correctly, the panel needs to be sized according to how much power you are going to use. (Later on you're going to need a bit of info on each electrical item you need to be solar powered).
Q:Can solar panels be installed on metal roofs?
Yes, solar panels can be installed on metal roofs. In fact, metal roofs are considered to be one of the best types of roofs for solar panel installation due to their durability, longevity, and ease of installation. The metal roof provides a stable and secure base for mounting the panels, ensuring optimal energy production. Additionally, the smooth surface of metal roofs allows for efficient panel placement, maximizing sunlight absorption.
Q:I paid for an appraisal and the home was valued at $25,000. The problem I have with this is my house is equipped with solar panels. I paid about $25000 for them. A comparable house sold for $225,000 4 months ago. Same amount of rooms, bathrooms, square feet, lot size and curb appeal (landscaping). But no solar panels. Home prices in my neighborhood have also gone up. I would like to know if there is any way I can dispute this as I feel I just wasted a lot of money on a incorrect appraisal.
You haven 't done your research. Solar panels reduce the value of a home. If you do own them outright, instead of renting them with a contract, be sure that the appraiser knew it or knows it now. It may not change the appraisal amount. If you are renting, the value will be worse. Nobody will buy a house and pay you for the contract you signed - for renting them.
Q:Can solar panels be used in developing countries?
Yes, solar panels can be used in developing countries. In fact, they can be a highly effective and sustainable solution for providing electricity in areas where access to energy is limited. Solar panels are easy to install, require minimal maintenance, and can harness the abundant sunlight available in these regions. Additionally, solar energy can help reduce reliance on expensive and polluting fossil fuels, improve access to electricity for schools, hospitals, and homes, and contribute to the overall development of these countries.
Q:I'm making a model of a solar photovoltaic tower for a school project. I need a way to store energy, and we thought about using capacitors (mainly because of our somewhat limited funding). The tower will have a small photovoltaic panel (around the size of a laptop keyboard with number pad) and some (around 50) quot;heliostats(just the mirrors, no moving parts). What kind of capacitors should i use? and would a capacitor bank be better? i am getting confused with all those uF, pF and can't see the difference.Thanx in advance
You need a rechargeable battery.Those uF you are talking about are Micro farads and pf are a million times smaller,they are less than gnat-bites compared to any rechargeable battery.You can get metal/metal hydride storage batteries (about .4v)and connect them in series if the voltage you generate is greater than that or in parallel if voltage is lower.Hard to advise without knowing voltage output from your design.As to getting hold of them there are so many in use you are sure to find someone who will lend a few (I would anyway!).
Q:How do I hook up solar panels to my home
Seriously, the best way to get an idea of what it takes is to call up a solar installer and get a free quote for your home. It costs you nothing, except your time. If there are no installers in your area, you may be in a bad location for solar.
Q:i want to build a stationary model of a solar panel and i dont know if it is going to be too simple or not i also want ideas to make it betterplease criticism is allowedmy idea was to make a case, just like a real solar panel, and take plexiglass to make it. i want to add some models of photovoltaic cells that look like they are in a solar panel . i want to add the fake shoulderings as well . i want to make the case openable by hinges.i would like some of your thoughts and ideas to help me .thx
Build okorder /
Q:Can solar panels be used in areas with high levels of rainfall?
Yes, solar panels can be used in areas with high levels of rainfall. While rainfall may temporarily reduce the amount of sunlight reaching the panels, modern solar panels are designed to efficiently capture and convert even diffuse light. Additionally, regular rainfall can help keep the panels clean, improving their overall performance.

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