Solar Photovoltaic Products
      Solar Photovoltaic Modules
      Solar Photovoltaic Systems

CEL is the pioneer in India to develop process technology for solar photovoltaic cells. Starting in 1976, the company began processing 2 inch wafer with Vacuum metalisation Technology when only major Oil Companies were Investing in R&D to develop solar photovoltaic technology. From such humble beginning, CEL progressed to develop and engage in commercial production of 4 inch round silicon wafers exhibiting efficiency in excess of 12%.

Being a technology company, CEL initiated linkages with Inter University Micro Electronic Centre (IMEC) of Belgium to undertake commercial production of the Screen Printing Diffusion Process developed by the latter. Solar Photovoltaic cells currently manufactured at CEL exhibits efficiency in excess of 15% (after anti-reflection coating) and uses two sets of back printing to achieve high back surface field (BSF) and high Open Circuit Voltages (Voc) in addition to the unique proprietary Screen Printing Diffusion.

Specifications	4 inch round cells	5 inch Pseudo square cells
Isc	2.5 A	4.6 A
Voc	605 mV	605 mV
Pm(typical)	1.05 W	1.95 W
Pm with AR Coating (Optional)	1.15 W	2.13 W
Modules wattage from 36 Cells(Non AR Coated)	38 Wp	74 Wp

Note: 1) All specification subject to tolerance of + 5%
         2) Ask for Cells for Guaranteed modules wattage

Laser Grooved Buried Contact Technology Cells (LGBC).

CEL also manufacture LGBC Technology cells through Technology linkage with the University of New Wales, Australia. LGBC technology offers unique features compared to Screen Printed Technology Cells

- Employ double diffusion to achieve up to 15% higher collection of carriers.
- Back Surface Fields (BSF) is created by a process of Aluminium evaporation.
- Laser Grooved Grid lines are 60 Micron deep and 40 micron wide with grid lines   separated by just 1.2 mm.
- Bus bars are laser grooved and each bus bar has about 20 grooves separated by a mere   100 microns.
- Electroless plating of Nickel, Copper and Silver on grooves to ensure low resistivity.
- High Fill Factor and consequently higher efficiency.

LGBC Cells exhibit efficiency of   over 17% and are available in 4 inch round and 4 inch PS sizes.

Specifications	4 inch round cells	4 inch Pseudo square cells
Isc	2.65 A	3.35 A
Voc	615 mV	615 mV
Pm(typical)	1.28 W	1.57 W
Modules wattage from 36 Cells	43-45 Wp	50-55 Wp

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