Solar Cell Charge

In this day and age, many people have a big dilemma. Almost all of us are dependent on electronic devices, from cell phones, GPS, portable media players and even laptop computers. Most of us also are concerned over the environment, and want to be able to use our toys and still be nice to Mother Earth.

If you are one of these people, one of the best ways you can start doing your part in saving the planet is with cell phone solar chargers. A solar cell charger uses the power of the sun to recharge the battery in your phone, no matter what make or model it might be. In addition, many also buy adapters for their other portable electronic devices.

You can find many different kinds of cell phone solar charges. Some are so small they can fit easily in a briefcase or back pack, and set up whenever you are in a sunny location, to keep your cell phone’s battery topped off, or in an emergency situation. Solar power technologies are becoming so advanced now that even on cloudy days they have some kind of electrical output. In addition, to charging up battery, a solar cell charger has an internal battery so that you have back up at night or on really stormy days. These can also be recharged over time, or when you get to a place that has a USB port.

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Many people are worried about the price of cell phone solar chargers because they may have heard they are expensive. It really depends on the output of the solar cell charger, what kinds of features it has, and what kinds of accessories are included. If you just want a basic solar charger, one that only has a cell phone plug and a USB port, you are looking at around $20. The larger the cell, them more out put it has, and the more adapters the more money. The Solar i-101 for example has a 1350mAh polymer rechargeable battery, an output of 5-6 volts. It can charge a cell phone in about any hour, and the internal battery can be charged within 15 hours of direct sunlight, or in four hours with the included USB jack. It also includes a bundle of five adapters, and costs just around $30.

While this may sound a little expensive for cell phone solar chargers, they can pay for themselves in a short period of time. If you ever get stranded and need to recharge or keep your cell phone going, these could save your life. Even so, it is important that you really shop around for your solar cell charger, because prices can vary greatly from retailer to retailer. While you may be able to find a small assortment of chargers from local electronic outlets, for the best prices as well as selection it is a good idea to go online. Here you will find the best deals.

Cell phone solar chargers can be a great addition for anyone who likes to get out and enjoy life, but also wants to still stay connected, whether that is being able to contact someone in an emergency, check their Email, or listen to music. These simple solar cell charging products can let you help save our planet, even on a small scale, letting your feel like you are doing your part in reducing our carbon footprint.

Originally published here.

Most people think of freeways as utilitarian structures, and nothing more. But for Swedish architect and urban strategist Mans Tham, freeways are majestic structures that could serve another important Acer aspire 4720 battery purpose.

In an effort to make freeways more attractive and functional, Tham would like to see Los Angeles’ famed highways covered in photovoltaic cells to power the very city the freeway bisects.

Aside from providing extra electricity to cities throughout the region, the proposal could “bring green-tech jobs for farming, harvesting and processing to the very neighborhoods that today are the most disadvantaged by their proximity to the freeway.”

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Tham estimates that if the Santa Monica Freeway was covered with solar panels between downtown L.A. and the coastline, Hp pavilion dv6000 battery it could provide 115 MW — enough electricity to power the needs of a city like Venice, California.

“The possibility of producing energy within the city is much better than ruining a desert for a solar farm and then losing energy on expensive transmission lines,” said Tham. “By letting infrastructure be a visually powerful part of the city, inside and out, its citizens are allowed to understand and cherish the complexity of their daily urban life.”

Tham’s aptly named “Solar Serpents in Paradise” plan also includes electric car charging stations under overpasses and adjacent algae ponds fed by the carbon dioxide-rich freeway air. The build-up of algae can then be harvested for biofuel.

This is not the solution to Toshiba pa3594u-1bas battery solve all energy concerns in highly urbanized regions, admits Tham. But he believes his plan could make better use of existing land, and is one of many steps necessary towards smarter cities.

Originally published here.

As the world advances, new technologies arise – or, in some cases, older technologies are exhumed and improved upon.

Although most people are under the impression that the field of photovoltaics is a new subject, based on recent invention, this is not actually the case. But first of all lets take a look at what “photovoltaic” means.

The word “photovoltaics” can be split up in to two parts: “photo” and “votlaic”. The term “photo” is derived from the Greek word “phos” which means “light.” A “volt” is a measurement unit for electrical force. So, literally, “photovoltaic” means “electricity through light.” And that is exactly what the word means: “capturing solar energy in the form of light and converting it into electricity.”

So how do we convert sunlight into solar energy and electricity?

In order to convert sunlight into electricity you need to use a material called a “semiconductor”.

In simple terms, a semiconductor is a material that acts as an insulator, but is also able to conduct electricity under certain conditions. We employ the characteristics of semiconductors when we convert solar energy (in the form of sunlight) into electricity. It is done as follows:

When a semiconductor (such as silicon) is exposed to sunlight, it releases small amounts of electrical energy. This is due to the process that occurs when electrons (bits of electricity) leave the surface of the semiconductor, as a result of being hit by light. We call this the “photoelectric effect.”

Sunlight is made up of “photons”, which are particles of solar energy. Not all photons are the same and not all carry the same amount of energy. A simple explanation for this is that light comes in many colors. Some forms of light are visible to the eye, while some forms are invisible (such as ultraviolet or infrared light). But, regardless of color or visibility, the fact remains that light is still light and the basic particle of light is still a photon.

When a photon hits a photovoltaic cell (also called a “PV cell” for short) one of three things occurs:

1. The photon can be reflected by the photovoltaic cell

2. The photon can be absorbed by the photovoltaic cell

3. Or (believe it or not) the photon can even pass right the photovoltaic cell. Only the photons which are absorbed by the photovoltaic cell are converted into solar energy (in the form of electricity).

When a photon is absorbed by the semiconductor (the material in the photovoltaic cell which produces electricity) the solar energy of the photon is passed to an electron in one of the atoms of the semiconductor. With this additional energy the electron is able to break away from its atom. Thus an electrical current is established.

This is the simplicity of what occurs in a photoelectric cell, when sunlight is converted into electricity. The electricity so produced can now be power an electrical device.

As you can see, the field of photovoltaics consists of the technology and the principles we use to convert solar energy into a usable form.

Photovoltaic Systems

Now that we know what a photovoltaic cell is and how it works, lets take this a step further and take a look at what a photovoltaic system is.

A photovoltaic system has consists of the following components:

A “photovoltaic module”, or “pv module”. This is a group of photovoltaic cells connected together. It is commonly referred to as a solar panel, though the terms “PV module” and “solar charger” are used to describe it as well. One or more batteries to collect and store the solar energy, which was converted into electricity by the PV modules (or solar panels, solar chargers, or whatever you choose to call them). A “charge controller”. This an electrical device which prevents the batteries from being ruined through overcharging, and which also prevents electrical current from flowing back out of the battery into the PV module or solar panel. “An inverter.” An inverter an electrical device which changes the electricity produced by the PV modules into alternating current. Alternating current is the type of electricity you get from your wall sockets at home. An inverter is only used with PV systems when you want to produce alternating current as your end result. If you run your house on solar energy, the inverter is installed between the batteries and the fuse panel.

A good quality PV system will operate for more than twenty years. The PV module, having no moving parts, has an expected lifetime exceeding thirty years. Most system problems occur due to poor or sloppy installation.

So how much electricity does a photovoltaic system generate?

The average PV system will generate about 180 kilowatt-hours per square meter, in most areas of the United States.

A photovoltaic system rated at 1 kilowatt will produce 1800 kilowatt hours per year.

In case you are not clear on what a “kilowatt-hour” is, this is a way of measuring the amount of electricity produced or consumed.

Let me put it in monetary terms, which might be easier to understand. Many photovoltaic panels are guaranteed to last a minimum of twenty years – and in fact, most claim to last thirty years. Even if we factor in the natural loss of efficiency in the PV modules over a period of twenty to thirty years, a PV system will generate close to 36,000 Kilowatt-hours in twenty years and 54,000 kilowatt hours over thirty years.

This is the equivalent of $10,000 worth of electricity at current energy prices.

Therefore, though initial installation of a PV system might seem a little costly, in the long run it is far cheaper to run on solar energy.

There are different types and sizes of solar panels (photovoltaic cells) which produce varying amounts of solar power.

Originally published here.