Showing posts with label clean electricity. Show all posts
Showing posts with label clean electricity. Show all posts

Tuesday, April 28, 2020

Off-Grid Residential Solar Power System

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There are three main solar power systems - grid-tied (on-grid, grid-connected), off-grid (stand-alone power system (SAPS), and hybrid solar (battery storage with grid-connection). Since I’ve already written about grid-tied systems, in this post I’ll give some basic information about off-grid residential solar power systems.


An off-grid solar power system is a solar panel system not connected to the grid. This means that you are completely independent of the utility grid and your solar system produces clean electricity for all your energy needs. The system consists of solar panels, an off-grid inverter, charge controller and rechargeable battery storage. An off-grid backup generator is an optional component. 

Before buying and installing an off-grid power system you should know your daily power needs. This will help determine which size system is appropriate for you. You can check out this off-grid system calculator to determine the size of the system for your off-grid home. Your solar panel system can be mounted on the roof or on the ground. 

The off-grid solar power system just like the other solar power systems works by generating electricity from solar panels. That electricity is direct current (DC), so it is converted using an inverter to alternative current (AC) and then it powers your home electronic appliances. AC is the standard form of electricity for anything that “plugs in” to utility power and it is a necessary form for the household appliances to work. 

When solar panels generate excess electricity it charges a solar battery (DC) via a charge controller. The charge controller is an essential component because it regulates the voltage and current that solar battery storage receives, to prevent overcharging and damage. And by saving the solar power in battery storage, it is possible to run your home appliances with energy from the sun, even at night or on cloudy days when solar panels produce less electricity. 

The off-grid solar power systems are much more expensive then on-grind systems due to the high prices of the batteries. It is suitable for one family home if you would like to gain complete energy independence, holiday houses, and especially for houses and farms in remote areas far away from the electricity grid. But although the off-grid solar power system is expensive this is a long-term investment that will save you money and deliver green, reliable power for decades.

See also: Solar Power Calculating Tools Online


Sunday, June 20, 2010

Solar City Tower Waterfall for Rio Olympics 2016

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Rio de Janeiro, Brasil, was selected for the 2016 Olympic Games and it is planning on building a massive solar powered artificial waterfall called "Solar City Tower", designed by Swiss (Zürich-based) company - RAFAA Architecture & Design.


The 344.5-foot tall (105 meters) Solar City Tower is going to be located on the small Cotonduba Island in Guanabara Bay. The enormous waterfall is almost twice the height of Niagara Falls and will be large enough to accommodate the opening and closing Olympic ceremonies. It is one of the first buildings that are being designed for the 2016 Rio Olympics.

This solar energy generating tower will be using many solar panels to produse electricity for the Olympic village by day. Any excess energy would be used to pump seawater into reservoirs at the top, so that it can be released by night as a spectacular waterfall. The falling water would also help turbines create electricity for the nighttime village.

In addition to producing energy, the Solar City Tower would have an elevator to take visitors to the very top of the tower, where a “glass sky walk” offers panoramic views of the surrounding harbor and Rio. There's even a platform at 297 feet (90.5) that provides bungee jumping. The giant tower would also house an auditorium, cafeteria, shop and amphitheater on the ground level.

The Solar City Tower is RAFAA’s entry in the International Architecture Competition for the 2016 Olympics, where the Brazilian metropolis aims to represent the green city of the future and hope to achieve its goal to host the first-ever zero-carbon Olympics.


Thursday, October 1, 2009

Power Your Home with Solar Roof Tiles

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Today the main way for homes to harness solar power is still through bulky rigid panels added to the rooftop or mounted on the ground. But inte recent years there are some innovations within the solar PV industry such as solar roof tiles. Solar roof tiles refer to Building Integrated Photovoltaics (BIPV) systems. They blend in better and help deliver clean, green solar power, without the need to sacrifice the aesthetic look and beauty of your home.

Solar roof tiles are made with built-in photovoltaic cells and the color of the solar tiles range from blue to violet to gray and blends well with most colors. Solar roof tiles are connected to each other via MC or other suitable connector type used inphotovoltaics and they work like conventional solar panels. One tile produces about 60 - 180 watts of electricity, and an entire roof could definitely power your entire house. A real hot sunny day could even mean profit for you, excess energy can be sold at a nearby company.

Solar roof tiles are more expensive than solar panels but in terms of the advantages it gives to a local user, it should outweigh the cons. Also, the government offers considerate breaks in taxes for homes that use solar power electricity.

Some of the companies currently producing solar roof tiles are General Electric, PowerLight, Sharp Electronics, and SunPower Corp.

Solé Power Tile, created by SRS Energy, is the industry’s first building-integrated photovoltaic product designed specifically for curved-roof systems and in my next post I'm going to write about it.


Friday, February 6, 2009

World's Leading Photovoltaic Companies

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PV Solar Panel
Sharp Solar is the world's largest photovoltaic module and cell manufacturer, with an overall capacity of 600 megawatts. It manufactures in Japan, in the UK - near Wrexham, and recently opened a large manufacturing facility in Memphis. Sharp Solar produces both single and multi-crystalline solar cells which are used for many applications. Sharp began its development of solar cells in 1959, with mass production first beginning in 1963. In 1980, it was one of the first companies to introduce calculators powered by solar cells.

Established in 1999, Q-Cells is the world's second largest cell manufacturer, based in Thalheim, Germany (Q-Cells AG was the single largest producer of solar cells in 2007 according to industry data). Its core business is the development, production and marketing of high-quality (mono- and multi-) crystalline silicon photovoltaic cells.

Based in Wuxi, China, Suntech Power is the world's third largest producer of photovoltaics in 2007. Suntech Power manufactures solar cells and modules and it is a global leader in solar energy as measured by both its production output and the capacity of its solar cells and modules.

Headquartered in Kyoto, Japan, the Kyocera Corporation is a pioneer in the solar energy market and began to develop solar cells in 1975. Today Kyocera is one of the world’s leading manufacturers of solar cells and modules, with a highly controlled mastery of all the production steps from wafer and cell fabrication to module assembly.

The Phoenix, Ariz.-based First Solar is a leader in the development and manufacture of high quality thin film solar modules. They manufacture photovoltaic solar modules developing advanced, thin film semiconductor deposition and high volume manufacturing processes, based on Cadmium Telluride (CdTe).

Motech is the largest manufacturer of photovoltaic cells in Taiwan. For over 25 years, Motech Industries, Inc. (Motech) has been creating high quality products, from testing and measuring instruments to solar cells. Motech has now become one of the top 10 producers of solar cells and the 6th largest crystalline solar cell manufacturer in the world (2007).

SolarWorld is headquartered in Bonn, Germany, and purchased Shell Solar's crystalline silicon activities in 2006. SolarWorld is one of the three largest solar energy groups in the world. The SolarWorld Group of companies is involved in every step of the solar value chain from raw silicon to turn-key solar power systems and is active in growing solar markets around the world.

Japanese company Sanyo Electric has been manufacturing solar cells and panels since 1970s. In 1992, Sanyo Electric started the practical application of installing the first PV generation systems on individual houses in Japan. SANYO HIT (Heterojunction with Intrinsic Thin layer) solar panels are a leader in cell and module efficiency with models up to 16.2 Watts per sq. foot (17.4% module efficiency). On July 29, 2008 the company announced, that it achieved a cell conversion efficiency of 22.3% at the research level.

China-based Yingli Green Energy is one of the world's leading vertically integrated PV product manufacturers. Yingli Green Energy sells PV modules under its own brand name, Yingli Solar, to PV distributors located in various markets around the world, including Germany, Spain, China and the United States.

SunPower Corporation is a Silicon Valley based solar company, and is one of the largest in existence.The company designs and manufactures high-efficiency silicon solar cells and solar panels based on an all-back-contact "All-Black" design. They install them through their subsidiary PowerLight. Their Nellis Solar Power Plant is currently the largest PV installation in North America

Schott Solar Germany is among the world's leading fully integrated manufacturers of PV wafers, cells and modules. The company has more than 40 years of experience and offers reliable PV solar electricity modules for almost any kind of application. Schott Solar is also one of the leading companies in thin film technologies.

Renewable Energy Corporation (REC) is based in Norway, and was established in 1996. Over a relatively short period, REC has become the world's largest producer of poly silicon and wafers for PV applications. The company has seven production plants in three different countries and customers all over the world.

Mitsubishi Electric is one of the world’s largest manufacturers and providers of solar power technology, including PV cells, modules and inverters. The company’s eco-friendly photovoltaic systems are used throughout the world to bring clean, reliable energy to residences, business, power generation plants, schools, and factories.

BP has been involved in solar power since 1973 and its subsidiary, BP Solar, is now a major worldwide manufacturer and installer of PV solar cells, with production facilities in the United States, Spain, India and Australia. Headquarters for BP Solar are located in Frederick - a city in west-central Maryland, United States.

Isofoton is a Spanish company, the biggest solar panel manufacturer in Europe. The company designs and manufactures high-efficiency mono crystalline silicon cells (also the most expensive), and it is currently the largest mono crystalline producer worldwide.

Nanosolar
was started in 2002 and is headquartered in Palo Alto, California. Nanosolar is a maker of thin-film solar panels and is a global leader in solar power innovation. Nanosolar Powersheet, a very thin film solar panel has won the Popular Science Innovation of the Year award. The company manufactures Powersheet by printing a solar absorbing “ink” onto a thin rolled metal sheet in a low-cost, fast, continuous process. The company has manufacturing operations in Silicon Valley, California, and the Berlin capital region, Germany.