Solar electrical systems are increasingly being installed all around the world by private households to decrease their electricity costs. This process also reduces their carbon emissions and contributes toward a greener environment. Solar PV panels are a critical part of these photovoltaic or PV systems.
Radiant sunlight energy is plentiful and free. As the price of conventional fossil fuels like crude oil, coal and natural has grown over time, the financial justification for moving to cheaper alternatives has strengthened. Additionally, some governments around the world, especially in Germany, have introduced arrange of incentives to accelerate the shift to PV systems.
A solar panel acts as a collection surface to harness the energy carried by ultraviolet sunlight. The panel is comprised of many solar cells interconnected or wired together. The cells are the central core of the panel, its heart. In addition to capturing the radiant energy, each cell also serves as a diode, permitting electric current to pass in one direction only, blocking current from flowing in the opposite direction.
To emphasize, the solar cell is the vital item of equipment serving to transform solar radiation into electricity. By comparison, the panel serves to protect those cells and provide a base for them to be mounted and wired to each other as one interconnected unit. The cells are mounted onto the panel, the panel is then mounted onto a building roof or ground rack.
Typically, a residential PV system will have the capacity to generate from 600 watts (0.6 kw) up to, say, 10.0 kw. The average sized, four person contemporary home requires about 7.0 kw of electrical power. To be clear, a 5.0 kw system has the capacity to flow or supply 5,000 watts of electricity, sufficient to power 50 light globes rated at 100 watts each. Or as another example, a small two-bar electric heater typically consumes about 1.0 kw of electricity so that a 5.0 kw system will power five those small heaters. These domestic systems are relatively expensive, costing tens of thousands of dollars.
A 7,000 watts PV system is a large configuration, likely requiring over 40 big solar panels. Most domestic systems would probably be smaller installations with smaller capacity. A 7,000 watts solar power system would allow a household to achieve significant power savings (perhaps upwards of 30 percent). The system would also lower carbon emissions by at least 10,000 tonnes per annum.
Panel size varies mainly in line with the size of cells mounted in the panel. Panel size is usually also limited by logistical requirements related to practical handling and installation issues. Panels are normally fixed onto racks erected either on the ground or on building roofs. To maximize their exposure to sunlight, panels are pointed north when south of the equator, and vice versa. Similarly, to optimize cell conversion efficiency, panels are inclined at an angle to the sun (about 30 degrees). Research scientists have confirmed that cell conversion efficiency can be significantly improved if panel inclination angle is varied continuously through the day, and day-by-day during the year, as the suns position relative to the earth changes.
Professional installers are available to install solar PV panels. These highly trained tradesmen are usually registered or certified by a central industry association or body. Installers can assist customers configure the entire PV system that will best meet their needs.
Placing a solar pv on your home or business to lower the cost of electrical power remitted to the utility company is easy and fast. You can take advantage of the clean and free energy provided by photovoltaics in an array panel.
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