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Solar Water Heater |
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Solar Lighting |
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| Product Overview | Solar Home Lighting System | Solar Street Lighting System Solar Lantern | Solar Garden Lighting System | Solar Power Plant | FAQs |
 Frequently Asked Questions - Solar Lighting |
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What is Photovoltaic Power? Photovoltaic (PV) power is the power available by converting light into electricity with photovoltaic cells. These solar cells are specially constructed from semiconductor materials, and are treated to generate a flow of electricity when light falls on them. Back to Top How do PV Cells Work? An electrical field is created near the top surface of the cell where these two materials (N-type silicon & P-type silicon) are in contact, called the P-N junction. When sunlight strikes the surface of a PV cell, this electrical field provides momentum and direction to light-stimulated electrons, resulting in a flow of current when the solar cell is connected to an electrical load. Back to Top What are Cells, Modules, & Arrays ? How does A PV System Work? PV systems are like any other electrical power generating systems, just the equipment used is different than that used for conventional electromechanical generating systems. A PV system consists of all the equipment, components and materials needed to generate solar energy, including solar panels (often called modules), a support structure, wiring, an inverter, a meter and other equipment as required by a specific application. Digiflic Solar can also customize systems to meet any need. Although a PV array produces power when exposed to sunlight, a number of other components are required to properly conduct, control, convert, distribute, and store the energy produced by the array. Back to Top Why Are Batteries Used in Some PV Systems? Batteries are often used in PV systems for the purpose of storing energy produced by the PV array during the day, and to supply it to electrical loads as needed (during the night and periods of cloudy weather). Other reasons batteries are used in PV systems are to operate the PV array near its maximum power point, to power electrical loads at stable voltages, and to supply surge currents to electrical loads and inverters. In most cases, a battery charge controller is used in these systems to protect the battery from overcharge and overdischarge. Back to Top What are Stand-Alone Photovoltaic Systems ?
Is solar power difficult to use ? Although the production of solar panels incorporates a high-tech manufacturing process, it’s really very easy to use a photovoltaic system. Solar panels have no moving parts to wear out, they can be used alone or in combination with other energy sources, and they are silent, reliable and long lasting. Back to Top Are there incentives available for PV systems ? What happens on cloudy or overcast days, when the sun isn't shining ? In remote, off-grid applications, a PV system is connected to a battery storage system as a backup power source. In grid-connected applications, the PV system works in parallel with the utility power grid. For example, when building electricity demands exceed the solar power output, the local utility makes up for the shortfall. Conversely, when the PV system generates. Back to Top What are the advantages of a PV ? PV systems can be designed for a variety of applications and operational requirements, and can be used for either centralized or distributed power generation. PV systems have no moving parts, are modular, easily expandable and even transportable in some cases. Energy independence and environmental compatibility are two attractive features of PV systems. The fuel (sunlight) is free, and no noise or pollution is created from operating PV systems. In general, PV systems that are well designed and properly installed require minimal maintenance and have long service lifetimes. Back to Top
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