Here’s an easy way to learn the way solar panels work.

What is solar power?

Solar energy is radiant energy that is produced by the sun. Daily the sun radiates, or sends out, a huge amount of energy. The sun radiates more energy in a single second than people have used since the beginning of time!

The energy of the sun derives from within the sun itself.

Like other stars, the sun is a big ball of gases––mostly hydrogen and helium atoms. The hydrogen atoms in the sun’s core combine to create helium and generate energy in a process called nuclear fusion.

During nuclear fusion, the sun’s extremely high pressure and temperature cause hydrogen atoms to come apart and their nuclei (the central cores of the atoms) to fuse or combine. Four hydrogen nuclei fuse to become one helium atom. However the helium atom contains less mass than the four hydrogen atoms that fused. Some matter is lost during nuclear fusion. The lost matter is emitted into space as radiant energy.

It takes countless years for the energy in the sun’s core to make its way to the solar surface, and somewhat over eight minutes to travel the 93 million miles to earth. The solar energy travels to the earth at a speed of 186,000 miles per second, the speed of light.

Simply a small percentage of the power radiated by the sun into space strikes our planet, one part in two billion. Yet this volume of energy is enormous. Each day enough energy strikes the United States to supply the nation’s energy needs for one and a half years!

Where does all this energy go?

About 15 percent of the sun’s energy that hits our planet is reflected back into space. Another 30 percent is used to evaporate water, which, when lifted into the atmosphere, produces rainfall. Solar power also is absorbed by plants, the land and the oceans. The remaining could be employed to supply our energy needs.

Who invented solar energy?

Humans have harnessed solar power for hundreds of years. As early as the 7th century B.C., people used simple magnifying glasses to concentrate the light of the sun into beams so hot they would cause wood to catch fire. More than a century ago in France, a scientist used heat from a solar collector to make steam to drive a steam engine.

At the beginning of the 20th century, scientists and engineers began researching ways to use solar energy in earnest. One important development was a remarkably efficient solar boiler introduced by Charles Greeley Abbott, a United States astrophysicist, in 1936. The solar hot water heater became popular at this time in Florida, California, and the Southwest. The industry started in the early 1920s and was in full swing right before World War II. This growth lasted up to the mid-1950s when low-cost gas had become the primary fuel for heating American homes.

People and world governments remained largely indifferent to the possibilities of solar power until the oil shortages of the 1970s. Today, people use solar energy to heat buildings and water and to generate electricity.

How we use solar power today?

Solar power is employed in a variety of ways, of course. There are two very basic types of solar energy:

* Solar thermal energy collects the sun’s warmth through one of two means: in water or in an anti-freeze (glycol) mixture.

* Solar photovoltaic energy converts the sun’s radiation to usable electricity.

Listed below are the five most practical and popular solutions on how solar energy is employed:

1. Small portable solar photovoltaic systems. We see these used everywhere, from calculators to solar garden products. Portable units may be used for everything from RV appliances while single panel systems are used for traffic signs and remote monitoring stations.

2. Solar pool heating. Running water in direct circulation systems via a solar collector is a very practical solution to heat water for your pool or hot tub.

3. Thermal glycol energy to heat water. In this method (indirect circulation), glycol is heated by sunshine and the heat is then transferred to water in a hot water tank. This technique of collecting the sun’s energy is much more practical now than in the past. In areas as far north as Edmonton, Alberta, solar thermal methods to heat water are economically sound. It can pay for itself in three years or less.

4. Integrating solar photovoltaic energy into your home or office. In many parts of the planet, solar photovoltaics are an economically feasible approach to supplement the power of your own home. In Japan, photovoltaics are competitive with other types of power. In the USA, new incentive programs make this form of solar power ever more viable in many states. An increasingly popular and practical way of integrating solar energy into the power of your home or business is through the use of building integrated solar photovoltaics.

5. Large independent photovoltaic systems. When you have enough sun power at your site, you may be able to go off grid. You may also integrate or hybridize your solar power system with wind power or other forms of renewable energy to stay ‘off the grid’.

How do Photovoltaic panels work?

Silicon is mounted beneath non-reflective glass to produce photovoltaic panels. These panels collect photons from the sun, converting them into DC electric power. The energy created then flows into an inverter. The inverter transforms the energy into basic voltage and AC electrical power.

Solar cells are prepared with particular materials called semiconductors like silicon, which is presently the most generally used. When light hits the photovoltaic cell, a particular share of it is absorbed inside the semiconductor material. This means that the energy of the absorbed light is given to the semiconductor.

The energy unfastens the electrons, permitting them to run freely. Solar power cells also have more than one electric field that act to compel electrons unfastened by light absorption to flow in a specific direction. This flow of electrons is a current, and by introducing metal links on the top and bottom of the Photovoltaic cell, the current can be drawn to use it externally.

Do you know the positives and negatives of solar technology?

Solar Pro Arguments

- Heating our homes with oil or natural gas or using electricity from power plants running with fossil fuels is a reason behind climate change and climate disruption. Solar power, on the other hand, is clean and environmentally-friendly.

- Solar hot-water heaters require little maintenance, and their initial investment may be recovered within a relatively small amount of time.

- Solar hot-water heaters can work in almost any climate, even in very cold ones. You just have to choose the best system for your climate: drainback, thermosyphon, batch-ICS, etc.

- Maintenance costs of solar powered systems are minimal and the warranties large.

- Financial incentives (USA, Canada, European states…) can aid in eliminating the price of the initial investment in solar technologies. The U.S. government, as an example, offers tax credits for solar systems certified by by the SRCC (Solar Rating and Certification Corporation), which amount to 30 percent of the investment (2009-2016 period).

Solar Cons Arguments

- The initial investment in Solar Water heaters or in Solar PV Electric Systems is higher than that required by conventional electric and gas heater systems.

- The payback period of solar PV-electric systems is long, as well as those of solar space heating or solar cooling (only the solar domestic hot water heating payback is short or relatively short).

- Solar water heating does not support a direct conjunction with radiators (including baseboard ones).

- Some air-con (solar space heating and the solar cooling) systems are very pricey, and rather untested technologies: until recently, solar air-con has not been an economical option.

- The efficiency of solar powered systems is determined by sunlight resources. It is in colder climates, where heating or electricity needs are higher, that the efficiency is smaller.

Article by Barbara Young.

Barbara Young writes on motorhome solar panels; in her personal hobby site 12voltsolarpanels.net. Her work is devoted to helping people save energy using solar energy to reduce CO2 emissions and energy dependency.

Did you ever think of adding some kind of attic ventilation to your house to keep it cooler during exhausting hot summer days or just to get rid of excessive humidity? There are quite a few solar powered attic fans on the market.
Your Solar Link now offers a new model of whisper quiet technology 20″ diameter blade (the largest blade on the market) Multi-Purpose Solar Attic Fans to ventilate attics and to keep your house cooler.

Solar Attic Fan. More about Multi-Purpose Solar Attic Fans.

Its newly designed co-polymer UV resistant shroud is created specifically to increase airflow and to isolate the solar module from heat transfer. Unlike metal it will not rust, corrode, or dent. These particular solar powered attic fans rely on a 30-watts (unlike earlier models with 10-20-watts panels) solar panel to power a DC motor when the sun is shining or even in partially cloudy climates. They are great for both residential and commercial use.
Solar powered fans usually exhaust air at a rate of 800 to 1200 CFM and are set up with intake vents (such as soffit and gable vents) to provide high-capacity powered ventilation without any electric operating costs. Multi-Purpose Solar Attic Fans from Your Solar Link exhaust air at a rate of 2400 CFM plus and are perfect for 1500 – 3000 square feet attic space homes. Most vents are positioned high on the roof, near the ridge, and combined with soffit or gable vents for balanced intake and exhaust air streams.

Image from www.yoursolarlink.com. Solar Attic Fan.
Read more on Multi-Purpose Solar Attic Fans HERE.

Because they cost nothing to operate, solar attic fans are much more affordable than conventional powered attic fans. By reducing your attic temperature, attic fans can help reduce summertime cooling loads, providing ventilation without added utility cost.

How well do solar attic fans work? Check out this video demonstrating solar attic ventilation.

Steps to install a Solar Attic Fan:

1. In attic, mark location of solar powered vent between two roof rafters.
2. Drive nail through center of vent location.
3. Install roof brackets and fall-arrest system to roof.
4. Scribe outline of vent’s flashing on roof using homemade dowel compass.
5. Cut shingles along circular outline with a utility knife.
6. Pull nails and remove shingles from within the circle.
7. Use compass to scribe hole for vent onto roof sheathing.
8. Cut hole in roof with a reciprocating saw.
9. Remove shingles from around the vent opening.
10. Apply continuous bead of tri-polymer roofing cement around hole.
11. Set roof vent over hole, then screw the fan’s flashing to roof.
12. Apply more caulking around flashing.
13. Replace all the roof shingles around the vent fan with 1 ½-inch roofing nails.

Sounds complicated? Not really. If you are hands-on and do-it-yourself type, you can easily put solar attic fan in. Just watch the video below (installing solar powered attic fan in just 30 minutes), read your solar fan manual and follow the steps.

Good luck trying to keep cool this summer and to those who already have installed their solar attic ventilation – enjoy free energy and let us know how it worked out for you!

One of the latest developments in urban design are rooftop gardens and landscaping walls.
Architects all over the world are proving that sustainable, urban agriculture can be economically valuable in the city.

Image from www.canpages.ca. Green Roof Garden.

Image from www.good.is.
Portland’s Vertical Garden on Edith Green-Wendell Wyatt Federal building.

It is green roof gardens that allow bringing vegetation into cities in a big way. The concept is surprisingly as simple as growing various plants up the outer walls and on rooftops. Remember one of the captivating wonders of the ancient world – Babylon Gardens?

Modern architects use concept of “Semiramida Gardens” allowing buildings to reduce heat island effects and to use less energy, saving on annual energy costs.

In the past green roof gardens were attractive and practical, but not edible.
This was until someone with a creative spark decided to make green roofs twice as useful and productive and use rooftop gardens as a source of fresh produce. Now green roof gardens are tied to restaurant businesses. And what could be more ingenious? The food that is used in exquisite culinary creations in the kitchens below grows right on the rooftops of restaurants all over the world!

Let’s take a look at some of the restaurants that implement green roofing produce in their everyday menus…

Image by Chicago Sun-Times. Chicago – Uncommon Ground restaurant rooftop garden.

Uncommon Ground restaurant in Chicago has a 2,500 square-foot rooftop garden. The executive chef tells the Chicago Sun-Times: “We just used the peppers from the garden and stuffed them with chorizo. When things from the farm are ready, we’ll incorporate it however we can. I come up once a day to see what’s ripe and ready.”

Image by Bonnie Alter. Toronto – Fairmont Royal York green roof.

In Toronto, at the Fairmont Royal York, twelve apprentice chefs grow a vegetable and herbs garden, also keeping bees on their roofs.

Image by Blueberry Farmers T&F. Ginza, Tokyo – bees on the roofs.

In Ginza, Tokyo an NPO, Ginza Mitsubachi Project manages to keep some 150 thousand bees with 260kg of honey gained each year. The honey is used in sweets by a celebrated confectionery shop.

Image from www.treehugger.com. New York City – Hydroponic Farm.

New York City’s First Rooftop Hydroponic Farm has been installed and is expected to produce 30 tons of fresh fruit, vegetables and herbs annually from its rooftop garden.

Image by NYBTA. The Science Barge.

Sun Works, the people who built the Science Barge – An Urban Farm that Floats and Grows in NYC, state that New York’s 14,000 acres of unshaded rooftop could feed as many as 20 million people a year, far more than the whole population of the city.

Image from Architects Newspaper. Rooftop garden in Los Angeles.

In Los Angeles, architect Alexis Rochas has put a rooftop garden on an old Holiday Inn that was converted to a condominium. See him talking about this project below.

These are just a few examples of creative uses of rooftops and walls gardens. Technology is moving forward and with a little bit of good will and a whole lot of imagination, there is hope for a wonderful and green future for our cities.

Father’s Day is approaching and once again we are starting to think of how we can show our appreciation and love. It is always a task to come up the perfect gift.
This is when many of us run into the problem… What do men like? What would our dads like?
If you think it is a good idea to purchase a pair of socks, tie or fancy liquor, think again!

1. The gift has to be thoughtful, meaning it has to appeal to the taste and personal interests of the men you give it to (Surprise! Lots of us have no idea of what our own fathers would like!).

2. It is nice if it is a long term (lasting) gift. Meaning a gift food basket will be forgotten (and eaten) very quickly.

3. Gifts have to be ready to go out of the box. Don’t give him something that says “assembly required” on the box. This will ruin that special day.

One of the best ideas to give as a gift on the Father’s Day is giving high-tech gadgets. Not all men like tools, but none of them can resist a cool and necessary gadget!

One of the interesting gadgets this year is the Solar Pocket Charger.

Solar Pocket Charger. Image by Your Solar Link.

It is a new category of solar products developed to create a more sustainable world.
These stylish, sleek and reliable pocket size solar battery chargers produce enough energy to keep your father’s gadgets going.
In remote locations, on vacation or in an emergency situation, the solar chargers will juice up his electronic devices. When conventional electrical supplies fail or are not available, these solar chargers prove to be reliable and only solution.
He can just keep it on his car dashboard and it will get charged by the sun, no effort is required!

The Solar Pocket Charger is great as a solar phone charger for any type of Mobile Phones, IPhones, PSA, PDA, Mp3 Players, Satellite Navigation, and much more.

Connectors included: Mini USB, Motorolla V66, Nokia 8210, Nokia 6101, Female USB, Samsung D80, Sony K750, Micro USB, LG KG800, Nintendo DS, Sony PSP, I-pod, USB Cable, DC Cable.
Includes an accessory bag to keep all your devices in one place and your charger protected.
A Solar Charger is easy to use and ready to go right out of the box.

Read more about Solar Pocket Chargers HERE.
And good luck with your shopping for the Father’s Day!

You may have recently moved to a new house and decided to add some twinkle to your garden, back yard, lawn or patio. Or maybe it is a place where you have spent all your life and now you’d like to do a few subtle or dramatic changes with outdoor lighting. It could be that you just want to add a bit of creative touch to your apartment balcony where you catch a breath of fresh air after a long day. Your neighbors across the yard have some nice string lights on their balcony and you are starting to think about doing something similar.
Where do you start?

Solar Path Lights. Image by Your Solar Link.

It can be a challenging and at the same time a fun process when looking into creating outdoor lighting for your home, yard or garden. The fun part of the process is that you are in control of creating a unique outdoor environment, inspired by your own imagination. You can create a comforting, welcoming mood with unique and eye-catching outdoor lighting.
However two challenges come to mind – finding a good bargain on the lights themselves, and the cost of hiring a licensed electrician to do the installation.

This is where solar powered outdoor lights step in. Solar lighting has become an increasingly popular alternative to the conventional and costly electric lights that currently illuminate our homes and living spaces.
Solar lights are affordably priced, simple and safe to install yourself (no digging ditches, laying the wire and attaching it to a junction box), and solar lights can be relocated easily, and above all else, you also save on electricity costs.

Solar lights use photovoltaic cells that absorb sunlight during the day and turn it into energy. Rechargeable batteries store the energy, making it available at night when it is needed. LED (light emitting diode) bulbs, which require little power and last 10 times longer than incandescent bulbs, provide the illumination. There is no wiring necessary to connect the lights to each other or to the electric grid.
Until recently, most solar lights emitted only muted light and were not all that reliable. With the latest developments in the solar lighting industry, this has changed and super-bright LEDs have replaced more conventional filament bulbs.
Light-emitting diodes (LEDs) create light without producing the waste heat of regular bulbs, are very bright, and yet require a minimal amount of electricity to function. The result is a reliable, long-lasting light source that will typically work for the life of the solar light product.
Other progress in solar lighting technology has been made in the development of more efficient, affordably-priced photovoltaic cells, improved circuitry, and more efficient batteries.

When shopping for solar lights, it’s important to match the light to the function you want it to perform. Consider these three primary categories of solar lights for use in the landscape: decorative accent lights, path lights and spotlights.

Decorative Solar Accent Lights.

Solar Butterfly Lights with Amber LEDs. Image by Your Solar Link.

Solar accent lights create an enjoyable and inviting glow for your landscape. They are designed to mark a place. Solar accent lights can be used to mark landscape hazards, such as a step or a rock that could be a hazard in the dark. They also can be used as garden features themselves, such as decorative solar figurines.
This type of solar light is not used to intensely illuminate an object or light up a pathway. But they would be a good choice to softly illuminate shrubbery and low hedges. Due to their low light output, accent lights usually stay lit longer than other types of solar lights. A quality accent solar light can run many nights on just a single day of sunlight charge.

Accent solar lights typically use efficient multi-crystalline solar cells that allow them to charge even on a cloudy day or in partially shaded areas.
Some accent lights utilize amber LEDs to create a softer ambience. Some of them can change colors, blink or flicker to simulate candle light.

Color Changing Solar Accent Lights. Image by Your Solar Link.

Amber LEDs use less electricity than the white LEDs, meaning they are going to stay on even longer after a short sun charge.
Compared to the other types of solar lights, accent lights have the lowest light output and are among the most affordably priced.

Solar Butterfly Lights with Amber LEDs. Image by Your Solar Link.

Path Solar Lights.
Path solar lights are good for lighting paths, walkways, driveway perimeters or other regions around your home and in your landscape. They are often used in multiples to guide the way along a set of stairs or a dark walk.

Path solar lights. Image by Your Solar Link.

Path lights usually come with a choice of ground stakes, flange mounts and hanging hooks. This gives the user a wide choice of placing options.
They also have on-off switches, a feature that allows the homeowner to store the electrical charge for a special event and ensure the longest potential run time. Some models may offer options such as high-low power, colored lenses, or timers. Solar path lights are in the mid-range choice in terms of price and light output.

Motion Sensor Path Solar Lights. These Path Lights increase in brightness as people pass by.
Image by Your Solar Link.

Task Solar Lights (Solar Security Lights, Solar Flood Lights and Solar Spotlights).
These solar lights are the brightest group of solar lights and usually carry the highest price tag. They are designed to direct a bright beam of light on plants, statuary or entryways.

Solar Spot Light. Image by Your Solar Link.

Solar task lights and spotlights are usually designed so they can be mounted in a number of ways and can be adjusted to shine in any direction. Most often, the solar panel can be mounted independently from the light (the two connected by a wire), which allows you to place the panel in a position where it will get the sun, and the light where you need it to shine at night.

What to consider when choosing solar lights for your exterior lighting needs.

Step 1.
Decide if you need decorative accent, path or task solar lights.

Step 2.
Find out whether the battery needs full sunlight to charge. Some lights charge with partial sun and work great under trees or in areas with low sunlight. This type of solar light can also be charged on a cloudy day.

Step 3.
Consider the operating time. Usually solar lights perform year round and even charge the battery to provide operation during long winter nights. Some solar lights shine for several days before needing to recharge.

Step 4.
Check the type of light bulb the solar light uses. LED lights offer the brightest and most efficient light when it comes to efficiency, size, price and energy usage. Some accent solar lights use amber LED lights to create a softer glow.

Step 5.
Compare extra items like timers or an on-off switch to the cost. Colored lenses change the look of the solar lights without compromising the brightness. Some solar lights mount to your house, hang from trees or can be mounted to your patio rail.

Step 6.
Match the lighting to your landscape theme. Decorative solar lights (figurines) can create an interesting theme for a landscape or lawn, or while positioned next to shrubbery trimmed to your taste. Country style solar lanterns will add that special countryside charm to your garden. Hanging Japanese Soji lanterns on your trees or patio will bring an Asian flare to your outdoors. Modern stainless steel solar accent lights complement contemporary landscapes. An ultra bright stainless steel solar light will be a great choice to light up your flag pole.

The possibilities are unlimited!