A solar cell, also known as a photovoltaic (PV) cell, is an electrical device that converts light energy directly into electrical energy through the photovoltaic effect. Essentially, a solar cell functions as a p-n junction diode whose electrical characteristics, including current, voltage, and resistance, vary when exposed to light. Individual cells are interconnected to form PV modules or solar panels, while multiple modules can be connected in series and/or parallel to form larger PV arrays capable of delivering the voltage and current required by a particular system.
The photovoltaic effect was discovered by Edmund Becquerel in 1839, when he observed that sunlight could produce an electric current in a solid material. PV technology developed significantly in the early 1950s as a spin-off of transistor technology, with silicon-based cells initially used as a costly power source for satellites. Continued technological development and cost reductions have enabled photovoltaic systems to become increasingly suitable for residential, commercial, industrial, and utility applications.
PV modules are rated according to their maximum DC power output under Standard Test Conditions (STC), defined by a cell operating temperature of 25°C, solar irradiance of 1000 W/m², and an Air Mass 1.5 spectral distribution. Actual field performance can differ from STC ratings because operating conditions vary. Modern PV modules are designed for reliability, with projected service lifetimes commonly ranging from 20 to 30 years. The project covers PV cell and module technologies, module construction, specifications, manufacturing processes, production-line equipment, plant layout, suppliers, applications, and market considerations.
| Particulars | Value |
|---|---|
| Plant Capacity | 0.375 MW/Day |
| Land & Building (6000 sq.mt.) | Rs. 5.01 Cr |
| Plant & Machinery | Rs. 14 Lac |
| Working Capital for 1 Month | Rs. 19.08 Cr |
| Total Capital Investment | Rs. 24.96 Cr |
A solar photovoltaic cell is an electrical device that converts sunlight directly into electricity through the photovoltaic effect. It is essentially a p-n junction device whose electrical characteristics change when exposed to light. Solar cells are commonly connected in series and parallel to achieve the required voltage, current, and power. Multiple cells are assembled into PV modules, and modules can subsequently be interconnected into larger PV arrays for residential, commercial, industrial, or utility-scale power-generation applications.
A PV cell is the basic unit that converts sunlight into electricity, while a PV module contains interconnected cells sealed in a protective laminate. A PV panel may consist of one or more modules assembled as a pre-wired, field-installable unit. A photovoltaic array is the complete power-generating unit formed by connecting multiple PV modules or panels. These components can be interconnected in series and/or parallel to achieve the voltage, current, and power characteristics required by the overall photovoltaic system.
The principal photovoltaic technologies covered in the report include single-crystalline, polycrystalline or multicrystalline, and amorphous or thin-film technologies. Crystalline silicon modules use silicon-based cells and are widely used because of their established manufacturing technology and electrical performance. Thin-film technologies use much thinner semiconductor layers and can offer different manufacturing and application characteristics. Selection depends on factors such as efficiency, available space, operating conditions, application requirements, and manufacturing considerations.
A typical solar PV module incorporates PV cells, front glass, EVA film, a backsheet, an aluminium frame, a junction box, bypass diodes, connecting ribbons, cables, and suitable sealants. These components collectively provide electrical generation, mechanical support, environmental protection, insulation, and reliable electrical connections. The manufacturing process assembles and encapsulates the components before framing, junction-box work, curing, testing, inspection, and sorting are completed.
Solar PV module manufacturing involves a sequence of material preparation, cell interconnection, lay-up, encapsulation, lamination, trimming, framing, junction-box installation, curing, testing, inspection, and sorting operations. The production line described in the report includes equipment for glass and encapsulant handling, template loading, tabbing and stringing, bussing, inspection, lamination, edge trimming, optical inspection, framing, junction-box processing, curing, module testing, and automatic sorting. The precise process configuration depends on the module design and level of automation.
Solar PV module performance is affected by irradiance, operating temperature, module design, cell characteristics, electrical configuration, and installation conditions. The report explains that PV modules are generally rated under Standard Test Conditions, including a cell temperature of 25°C and irradiance of 1000 W/m². Actual field performance can differ because real operating conditions are not always equivalent to laboratory test conditions. The report therefore includes I-V characteristics, temperature effects, irradiance effects, light intensity, and solar array parameters as important performance considerations.
Solar PV power systems can serve residential, agricultural, industrial, telecommunications, public-service, healthcare, and other electricity applications. PV modules generate direct-current electricity and can be integrated into complete photovoltaic-based electrical systems using suitable system components. Their modular nature allows installations to be configured for different power requirements and operating environments. The report specifically examines applications across agriculture, industry, telecommunications and public services, health, and residential sectors, along with broader photovoltaic power-plant uses.
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