Photovoltaic Energy System

If photovoltaics are such a wonderful source of free energy, then why doesn't the whole world run on solar power? Some people have a flawed concept of solar energy. While it's true that sunlight is free, the electricity generated by PV systems is not. As you can see from our discussion of a household PV system, quite a bit of hardware is needed. Currently, an installed PV system will cost somewhere around $9 per peak Watt. To give you an idea of how much a house system would cost, let's consider the Solar House -- a model residential home in North Carolina, with a PV system set up by the North Carlina Solar Center to demonstrate the technology. It's a fairly small home, and it is estimated that its 3.6-kW PV system covers about half of the total electricity needs (this system doesn't use batteries -- it's connected to the grid). Even so, at $9 per Watt, this installed system would cost you around $32,000.

That's why photovoltaics(PV) is usually used in remote areas, far from a conventional source of electricity. Right now, it simply can't compete with the utilities. Costs are coming down as research is being done, however. Researchers are confident that PV will one day be cost effective in urban areas as well as remote ones. Part of the problem is that manufacturing needs to be done on a large scale to reduce costs as much as possible. That kind of demand for PV, however, won't exist until prices fall to competitive levels. It's a Catch-22 situation. Even so, demand and module efficiencies are constantly rising, prices are falling, and the world is becoming increasingly aware of environmental concerns associated with conventional power sources, making photovoltaics a technology with a bright future.

Photovoltaics systems are an important power source for space missions. Solar cells have not only enabled to explore space, the solar system, and the Earth in great detail, they also have enabled the emergence of the telecommunications industry.

General schematic of a residential PV system with battery storage

Throw in the mounting hardware, wiring, junction boxes, grounding equipment, overcurrent protection, DC and AC disconnects and other accessories and you have yourself a system. Electrical codes must be followed (there's a section in the National Electrical Code just for PV), and it's highly recommended that the installation be done by a licensed electrician who has experience with PV systems. Once installed, a PV system requires very little maintenance (especially if no batteries are used), and will provide electricity cleanly and quietly for 20 years or more.

Uses of Solar Energy | Solar Cell Function | Building a Solar System | Solar Electricity Systems | Solar Energy Production | Solar System Planning | Solar Energy News | Solar System News | Solar Cell Anatomy | Solar Energy Appliances | Solar Energy Storage System | Solar Hot Water System | Solar System Hardware | Solar System Sizes | Solar Thermal Electricity | Solar Energy Glossary A-Z | Solar Energy FAQs | Hot Shapers in Pakistan | Hot Shapers belt in Pakistan | Snap n grip in Pakistan | Uses of Solar Energy | Telemall | Dubai Escorts | Indian Escorts in Dubai | Pakistani Escorts in Dubai | Dubai Escorts | Indian Escorts in Dubai | Pakistani Escorts in Dubai | Dubai Escorts | Indian Escorts in Dubai | Pakistan Escorts in Dubai | Dubai Escorts | Indian Escorts in Dubai | Pakistani Escorts in Dubai