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Shenzhen Kewell Technology Development Limited
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2013 high efficiency 4w monocrystalline solar cell with lowest price
Kewell company is a high tech environmental friendly enterprice which was established in 1998 .
With the rapid development of solar industry ,kewell company have owned three subsidiary companies -one silicon mine in jiujiang city jiangxi province ,one hardware company and one solar panel factory in shenzhen.our soalr panel factory employed around 200 skilled workers ,10 senior R and D engineers, more than 10 overseas salesperson, 2 after-sales center and 3 production instructors , we would like to offer our customers comprehensive serivice and technical support from pre-sale and after -sale
Under strict quality control system , our products include :
125mm mono solar and 156mm poly and mono solar cell
3w to 300w monocrystalline and poly-crystalline silicon solar panel
5w to 50kw home use or roof solar power system include off-grid system and on-grid system .
200w to 200kw wind turbine system
Which are exported to more than 40 countries such as Europe, America,Africa,Asia ,and gain a higher reputation .we offer OEM,ODM,OBM service as per customer request and aim at making a greater contribution to the usage of solar energy globally
If you are in this line , hope we can cooperate and help you expand your market and realize win-win .
1) i want to introduce you our monocrystalline solar cell
Physical characteristics:
Dimension 156mm x 156mm ± 0.5mm
Thickness Wafer(Si): 200μm ± 20μm
Cell: 240μm ± 40μm
Front: Silver bus bars; Blue/others silicon nitride antireflection coating
Back: Silver/aluminum bus bars; Full-surface aluminum BSF
2) specification
Efficiency Code | 1920 | 1900 | 1880 | 1860 | 1840 | 1820 | 1800 |
Efficiency Eff(%) | >19.10 | 18.90~19.10 | 18.70~18.90 | 18.50~18.70 | 18.30~18.50 | 18.10~18.30 | 17.90~18.10 |
Power Ppm(w) | >4.648 | 4.600-4.648 | 4.551-4.600 | 4.502-4.551 | 4.453-4.502 | 4.405-4.453 | 4.356-4.405 |
Max.Power current Ipm(A) | >8.391 | 8.391 | 8.379 | 8.351 | 8.338 | 8.324 | 8.310 |
Short Circuit Current Isc(A) | >9.205 | 9.205 | 9.133 | 9.074 | 9.001 | 8.940 | 8.878 |
Max Power Voltage Vpm(V) | >0.551 | 0.551 | 0.546 | 0.542 | 0.537 | 0.532 | 0.527 |
Open Circuit Voltage Voc(V) | >0.631 | 0.631 | 0.630 | 0.629 | 0.628 | 0.628 | 0.627 |
Data under standard testing conditions (STC): 1,000W/M, AM1.5, 25
* All figures bear ±3% of tolerance.
* The measurement of cell is calibrated by Fraunhofer ISE.
Typical temperature cofficients :
Voltage -2.12mV/K
Current +2.5mV/K
Power -0.43%/K