Archive for January, 2012

Your Questions About Photovoltaic Solar Panels Information

Ken asks…

Where to buy solar panels?

I’m hypothetically speaking but how would i go about converting my house into one that runs on solar panels?
does anybody have any links to information on photovoltaic panels or links to companies that actually sell them, not just talk about them and give u a “quote”? Thanks

Henry Dover answers:

First you have to figure out how much electricity is needed to run your house. Check your electric bills for the last year, figure out an average KWH/ day and the maximum KWH/day used in the year.

Your normal solar system can only generate usable electricity for less than 8 hours a day in the summer and 5 hours a day in the winter. Varies some as you move farther north and how many cloudy days you have. Example Tucson AZ is considered an ideal climate for solar power and has 7.42 sun hours per day maximum and 6.01 sun hours per day minimum (winter) with an average of 6.57 sun hours per day This means an average of 6.5 hours per day of usable solar electricity. Do a search on ” Insolation chart ” to find your area.

Anyway a half decent price for a 1.9 KW system which produces approximately 12KWH per day is around $13,000 un-installed. Add the cost of the installation and the fact that 12 KWH per day is not enough to reduce your bill to zero and a typical whole house system will cost around $80,000 without installation and without battery backups for nighttime electricity.

General information: http://www.homepower.com/basics/solar/
Good luck
Google search on quotes for solar: http://www.google.com/search?hl=en&newwindow=1&safe=off&q=household+%22solar+electric%22+system+quotes&btnG=Search

Mary asks…

Do solar panel cell phone chargers actually work?

I wiil be going on a camping trip soon and will not have any 120v outlets readily available to charge my cell phone or ipod besides a vehicle charger. But I was wondering if anyone has had any experience using portable solar photovoltaic panels to charge their cell phones or other small electronics? I’ve seen some on amazon.com, but Im a bit skeptical about buying one. A link and some information as to how well they work would be appreciated. Thanks.

Henry Dover answers:

I couldn’t find that many reviews but what i did find shows that it is a good way to go here`s the links i found

http://www.12voltsolarpanels.net/charge-your-cell-phone

http://reviews.cnet.com/4520-11288_7-6427792-3.html

http://www.nextag.com/solar-cell-phone-charger/stores-html

Charles asks…

How could i estimate the area of a photovoltaic panel for solar powered garden light?

known info:
At night the LED is illuminated, drawing a current of 25 mA
battery supplies 1.2v
runs for 12 hours at night.
take standard air mass to be AM 1.5 1000 W m^2
No information on panel size,
rough estimate: 5 hours good sunlight per day

Would i need to calculate the daily energy requirement of the LED first?

I’ve calculated the power level to drive the LED is 25 mA x 1.2v = 30 mW
so 30mW x 12hours = 360 mWh = 0.36e-3 Wh

behond this I’m not sure!!!

solar panels power output in a day = efficiency (w/m^2) x area (m^2) x duration of sunlight (s) ws ???

Henry Dover answers:

Energy_led = Energy_pvmodule

Energy_led = t_night*I*V

Energy_pvmodule = Pdc_stc * t_peaksun_eqiv

Solve for Pdc_stc (power direct current at standard test conditions):
Pdc_stc = t_night*I*V/t_peaksun_eqiv

Data:
t_night = 12 hours
t_peaksun_eqiv = 5 hrs
I = 0.025 Amps
V = 1.2 Volts

Result:
Pdc_stc = 0.072 Wdc

This is the minimum nameplate size at standard test conditions that your PV module can be.

In reality, it will need to be much more…because you will need to compensate for battery charging and discharging loss…as well as the inefficiency of the MPPT charge controller.

To figure the area associated with it, you need to know the efficiency of the PV module…call it eta.

Typically, this ranges from 10% for laminates to 22% for some of the best crystalline designs.

Let’s accept eta = 15%.

We equate DC peak power to incident solar radiation (J) multiplied by efficiency (eta) multiplied by module area (A):
Pdc_stc = J*A*eta

Solve for A:
A = Pdc_stc/(J*eta)

J = 1000 W/m^2
eta = 0.15
Pdc_stc = 0.072 Wdc

Result:
A = 0.00048 m^2
aka
A = 4.8 cm^2

Betty asks…

Looking into a solar electricity lease. Seeking advise/information sharing..?

Looking at leasing to own option (15 year) on a solar photovoltaic panel on my roof. I am looking at low downpayment ($0 to $1000), but that comes with higher purchase price, and 3.5% annual rate increase.
Is such leasing a smart option? What factors should I consider before making a decision? What if I don’t plan to own the house for the 15 years?
Thanks in advance!

Henry Dover answers:

I didn’t notice an annual cost mentioned in your question. If the cost of the leased system is equal to the portion of your electricity bill that would be displaced, I’d say the lease is a good deal. Electricity has increased at about a 6% rate over the years, I believe.

You’ll have to check the contract to see what would happen if you move. Possibly, the balance will be due in full, or they’ll reposess the panels. Will they put a lien against your house on account of this, or are the panels themselves the only security?

Possible red flags:

- They pressure you to sign on the spot.
- They don’t have the full contract handy.
- They are selling a future installation, and have no examples of their installs in your neighborhood.
- They want the deposit long in advance of the actual work being done. (There are many scams where you give a deposit, and you never see them again.)
- They do not have a physical office, where you can drop by and see stacks of panels, inverters, wire, conduit, tools, and other things necessary for an installation by a real company.
- There is no performance guarantee, but the price is fixed. If the deal is you would pay $x per kWh produced, great. But without a performance guarantee, they could put up a cheap, crappy system that hardly saves you any electricity, and you would owe on the lease for the next 15 years, on top of your regular electricity bill.
- There is no provision in the contract for what happens if the system breaks. What if they put up something substandard that breaks after a year, and produces no electricity thereafter? Is it your responsibility to get it fixed? Are you forgiven your lease payment until it is fixed?

Note that the lease-to-own scheme is not the usual way that people choose to get panels installed. With the exception of large corporations that put up on the order of a megawatt of panels, I know of no one who leases.

If this is a company that also does conventional installs (the homeowner owns it outright), and you are able to find references of their work in your area that you can visit, I’d be more inclined to trust them.

Mark asks…

What is the largest solar panel / PV company?

I need to know the largest solar panel / photovoltaic company in the world and in Asia.
I heard that Sun Tech is one of the biggest but I need a more reliable source of information. Can anybody help?

Henry Dover answers:

There are a lot of ways to define largest:

- sales
-market cap
- number of units placed
- number of employees

You should be more specific. Also, remember that some companies that make solar are part of a bigger company, so it is hard to differentiate the solar part from the rest of the company.

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Jan 31, 2012 Solar Events, Conferences and Tradeshows Around The World

Information on 2012 solar events, tradeshows, conferences and other renewable energy fairs in USA and other parts of the world. List your event here.

Your Questions About Why Solar Panels Are Costly

Ken asks…

why are solar panels costly when sand is available everywhere?

Henry Dover answers:

Why are laptops costly, when plastic and wires are available everywhere?
Why are diamonds costly when coal is available everywhere?

Richard asks…

Why do liberals want to charge people for costly green projects during the recession?

Expensive light bulbs, fuel efficient cars, solar panels its all a pretty unaffordable luxury for most Americans. In texas, there barely starting to make an industry that will employ Americans to create solar panels but it still will not reduce the prices all together. Lets face it if we can get water and electricity for free the government will be out of business that is why they want to charge you for air as well.

Henry Dover answers:

Ever seen the EPA guidelines for handling the new and improved so called Green Light Bulbs ? Its about 5 pages long and contains such passages as if a bulb should accidentally break , immediately air out the premises by opening adjacent doors and outside windows . After 15 minutes the area should be considered safe enough to return for disposal . ————-Sounds like a radiation leak exercise to me.

Maria asks…

What do you think is the most creative idea for an Alliterative Fuel Vehicle?

- Electrics have problems with recharge time and distance limits.
- Hybrids are nice but still use gas. Better fuel?
- Bio-diesel is ok but can we create enough oil?
- BMW is using Hydrogen but it is costly to produce and dangerous.

So Yahoo what are your creative ideas. Thanks for your answers in advance.

I have two ideas:
1. A different kind of Hybrid car. Human / Electric. Batteries run the motor but the car only runs if a person is pedaling to spin a generator to feed the batteries. It should also be able to be plugged in for over night recharging.
Solves two problems: Distance and weight loss.

2. Bio-diesel / Electric Hybrid with solar panels and a plug.
Electric as the main source. Plug in is more efficient that burning gas for recharging. Solar, why not use it to recharge when possible. Bio-diesel because when you have to go to it, it still burns cleaner than gas.

So again what are your ideas. Just curious. Thanks.
OK, I get it people I made a spelling error and forgot to spell check. Please remember “Let those who have never made a spelling mistake, cast the first bit of sarcasim!” Thanks

Henry Dover answers:

Electric cars are getting better when it comes to mileage per hour of recharging. But they still require energy, namely electric energy. Which begs the question “what do you think is the best idea for alternative production of electricity?” Maybe solar generation will be made more efficient over the next decade if both business and government invest enough in the technology.

Hybrids are a good stepping stone. It’s still some gasoline, but at least you get superb mileage and consume less petro.

Hydrogen is a rather stupid idea since it is not only dangerously explosive, but takes more energy to initially produce than it releases when burned. I’m not saying there is no role for hydrogen fuel, just that it can never be a major energy staple.

I think biofuel, especially cellulose ethanol, is the most practical long-term solution to our fuel energy issues. Critics will insist that ethanol doesn’t work, that its production consumes more oil energy than the bio energy we get out of it. But that is only because we use mediocre biofuel crops (such as corn) and we produce it by more primitive means.

Brazil, which uses the “old production” method still gets a strong net energy gain on its sugarcane ethanol, mainly because sugarcane is a better crop for producing “old” ethanol than corn. But the “new” way of producing alcohol from fiber rather than sugar could increase gallons-per-acre yield more than twofold from Brazil’s sugarcane and make ethanol a truly feasible fuel. In temperate climates with distinct winter seasons, switchgrass and hempstalk would be excellent “new” ethanol crops since sugarcane isn’t hardy and the new method produces far more fuel anyway.

Even with alternative fuel we still have to cut down on the total miles that society drives by encouraging more carpooling, mass transit, and opportunities to work/shop closer to home.

Mark asks…

Why can’t we harness the sun’s energy properly?

I was just wondering why we can’t, are the conversion methods too complicated, long, or costly?
Obviously there is a reason we can’t, otherwise we’d be using it instead of secondary sources surely?

Tried googling already but it just comes up with solar panels… but that’s not really what I mean.

thanks

Henry Dover answers:

Solar power cannot be harnessed during a storm, on a cloudy day or at night. This limits how much power can be saved for future days. Some days you may still need to rely on oil to power your home.

Mandy asks…

Do most people who try to be “green” only do it up to the point until it’s an inconvenience or too costly?

I have no problem with people doing that. That’s your choice. That’s why a free market is great. I myself only do a few things, not because I believe in the cause, but because it saves money. But do most “green” people preach that it’s what we should do to save the planet only do it to a point? If they were truly believers, wouldn’t they hold off on that new 52″ plasma tv as it uses more energy than a standard projection or lcd tv? Shouldn’t they get rid of that electric can opener or battery-operated toothbrush? Shouldn’t they install energy efficient windows and doors? And when they do, how do they dispose of the old one’s without polluting the environment more? And shouldn’t they not drive a car at all since even a hybrid still pollutes? Why not hold off buying that Prius and invest in a car with solar panels? If they are so concerned, why not lead by example instead of telling me what I need to do while they do the bare minimum and parade around as if they’re so noble?
Nickel, while I don’t agree with you, I appreciate your input. I like that someone from Europe could put their opinion. I think the EU assuming that the common citizen doesn’t know isn’t a fair assumption. There are more than enough sources to find out a valid argument for either side of this debate. It’s just a matter of deciding which makes more sense when combined. I’ve heard just about every argument, and I believe that while the earth is warming, it is not caused by humans. As for relying on politicians to make all the decisions, that’s dangerous, which is why there are some unfair laws regarding the environment in Europe. Politicians are in the game of politics, so they shouldn’t be trusted to always do what they “believe” is right. As for my children, I believe their existence will be just as good as mine is, since I don’t believe the world is in dire straits like many would have you believe.

Henry Dover answers:

Star for you! I 100% agree with you! I was feeling pretty cynical yesterday, when I answered a question about someone wanting to be “green.”

Here’s the link to THAT question:

http://answers.yahoo.com/question/index;_ylt=AknsqPBgXq3M1zHLEFsZx_Pty6IX;_ylv=3?qid=20071210194356AAUknPU&show=7#profile-info-AA12157050

For my husband and I, who really DO live very “green” lives, I get pretty tired of the folks who do one little thing, and then think they have saved the earth.

CFL bulbs happen to be one of my big pet peeves right now. I too was suckered into them. When I found they were not holding up to their promises, I did some research, and found they are made in China, use more electricity to produce than they will ever save, of course are shipped over the ocean, are toxic waste, since they have mercury in them, last only about 7 months in my house (vs 3 years for the incandecents!), and certainly not the seven perdicted years, and to top it off, are packaged in plastic clam shells instead of the highly recyclable cardboard of incandecents.

And yet people are trying to pass LAWS that state I MUST use them (here in the U.S.)? Oh please!

No vehicle my husband and I drive is newer than 20 years…not a single one. Some are over 40 years old. The tractors we use are even older than that (1930′s for some).

Our vehicles all did their manufacturing environmental damage more than a generation ago. Every one of them can run on the biofuel we produce right here on our farm. If my husband and I needed or wanted to, we could become nearly totally indepentant of foreign oil. Of course funny enough their are laws that prevent us from driving our biofuel on the roads, so we don’t. Be green! Oh no, wait…it’s illegal to be green!

Shall we talk about the fact that I produce very humanely raised and cared for meat goats, and meat rabbits? It is however totally illegal for me to butcher an animal for our customers, right here in very clean, very sanitary open air, and sunshine outdoors. I can however take my animals to be butchered at a slaughterhouse that processes 400 or more animals an hour and allow my customers to pick the meat up there. Of course I know which is cleaner, and much more humane, but that does not matter…it is still illegal for me to butcher for my customers in environmentally green ways. Thank heavens in my state it is still legal for customers to come to my farm and butcher the animals themselves….I’m sure that loophole will be closed eventually.

I agree with you, that a free market is great. Funny thing is, the greener your lifestyle, the more likely you are to run into laws that make it illegal.

Let’s face it….the Government only wants people to become so independant. If people were suddenly driven to become very independant, living green lives, in a mostly agrarian way, it would drastictly lower the taxes the Government brought in, and there-by lower the amount of power the Government has (just think of it!). No, wait…don’t think…it makes the Government nervous when people turn off the TV and think for themselves.

What really drive me nuts are the hypocrits. People who tell me I’m cruel and heartless for killing and butchering a cute widdle bunny wabbit, or widdle goat I’ve raised….while freely admiting they eat meat! So they will consume the flesh of some animal they have no idea what was fed to it, what drugs were pumped into it, nor how it was treated…yet I’m the cruel one?! Oh please!

I hate the hypocrits who preach living a green life, and yet do not do it themselves, indeed spend time jetting about the world (think Gore). I am really botherd by the new trend of people and companies toward buying “carbon credits.” What a HUGE load of horse pucky! Bloody well clean up your own act, don’t pretend it’s all better, because you purchased carbon credits from someone else who REALLY does live a green lifestyle!

Ok….I think I’m going to stop right there, before I say something I shouldn’t.

Great question!

~Garnet
Homesteading/Farming over 20 years

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Your Questions About Why Solar Panels Are Costly

Ken asks…

why are solar panels costly when sand is available everywhere?

Henry Dover answers:

Why are laptops costly, when plastic and wires are available everywhere?
Why are diamonds costly when coal is available everywhere?

Richard asks…

Why do liberals want to charge people for costly green projects during the recession?

Expensive light bulbs, fuel efficient cars, solar panels its all a pretty unaffordable luxury for most Americans. In texas, there barely starting to make an industry that will employ Americans to create solar panels but it still will not reduce the prices all together. Lets face it if we can get water and electricity for free the government will be out of business that is why they want to charge you for air as well.

Henry Dover answers:

Ever seen the EPA guidelines for handling the new and improved so called Green Light Bulbs ? Its about 5 pages long and contains such passages as if a bulb should accidentally break , immediately air out the premises by opening adjacent doors and outside windows . After 15 minutes the area should be considered safe enough to return for disposal . ————-Sounds like a radiation leak exercise to me.

Maria asks…

What do you think is the most creative idea for an Alliterative Fuel Vehicle?

- Electrics have problems with recharge time and distance limits.
- Hybrids are nice but still use gas. Better fuel?
- Bio-diesel is ok but can we create enough oil?
- BMW is using Hydrogen but it is costly to produce and dangerous.

So Yahoo what are your creative ideas. Thanks for your answers in advance.

I have two ideas:
1. A different kind of Hybrid car. Human / Electric. Batteries run the motor but the car only runs if a person is pedaling to spin a generator to feed the batteries. It should also be able to be plugged in for over night recharging.
Solves two problems: Distance and weight loss.

2. Bio-diesel / Electric Hybrid with solar panels and a plug.
Electric as the main source. Plug in is more efficient that burning gas for recharging. Solar, why not use it to recharge when possible. Bio-diesel because when you have to go to it, it still burns cleaner than gas.

So again what are your ideas. Just curious. Thanks.
OK, I get it people I made a spelling error and forgot to spell check. Please remember “Let those who have never made a spelling mistake, cast the first bit of sarcasim!” Thanks

Henry Dover answers:

Electric cars are getting better when it comes to mileage per hour of recharging. But they still require energy, namely electric energy. Which begs the question “what do you think is the best idea for alternative production of electricity?” Maybe solar generation will be made more efficient over the next decade if both business and government invest enough in the technology.

Hybrids are a good stepping stone. It’s still some gasoline, but at least you get superb mileage and consume less petro.

Hydrogen is a rather stupid idea since it is not only dangerously explosive, but takes more energy to initially produce than it releases when burned. I’m not saying there is no role for hydrogen fuel, just that it can never be a major energy staple.

I think biofuel, especially cellulose ethanol, is the most practical long-term solution to our fuel energy issues. Critics will insist that ethanol doesn’t work, that its production consumes more oil energy than the bio energy we get out of it. But that is only because we use mediocre biofuel crops (such as corn) and we produce it by more primitive means.

Brazil, which uses the “old production” method still gets a strong net energy gain on its sugarcane ethanol, mainly because sugarcane is a better crop for producing “old” ethanol than corn. But the “new” way of producing alcohol from fiber rather than sugar could increase gallons-per-acre yield more than twofold from Brazil’s sugarcane and make ethanol a truly feasible fuel. In temperate climates with distinct winter seasons, switchgrass and hempstalk would be excellent “new” ethanol crops since sugarcane isn’t hardy and the new method produces far more fuel anyway.

Even with alternative fuel we still have to cut down on the total miles that society drives by encouraging more carpooling, mass transit, and opportunities to work/shop closer to home.

Mark asks…

Why can’t we harness the sun’s energy properly?

I was just wondering why we can’t, are the conversion methods too complicated, long, or costly?
Obviously there is a reason we can’t, otherwise we’d be using it instead of secondary sources surely?

Tried googling already but it just comes up with solar panels… but that’s not really what I mean.

thanks

Henry Dover answers:

Solar power cannot be harnessed during a storm, on a cloudy day or at night. This limits how much power can be saved for future days. Some days you may still need to rely on oil to power your home.

Mandy asks…

Do most people who try to be “green” only do it up to the point until it’s an inconvenience or too costly?

I have no problem with people doing that. That’s your choice. That’s why a free market is great. I myself only do a few things, not because I believe in the cause, but because it saves money. But do most “green” people preach that it’s what we should do to save the planet only do it to a point? If they were truly believers, wouldn’t they hold off on that new 52″ plasma tv as it uses more energy than a standard projection or lcd tv? Shouldn’t they get rid of that electric can opener or battery-operated toothbrush? Shouldn’t they install energy efficient windows and doors? And when they do, how do they dispose of the old one’s without polluting the environment more? And shouldn’t they not drive a car at all since even a hybrid still pollutes? Why not hold off buying that Prius and invest in a car with solar panels? If they are so concerned, why not lead by example instead of telling me what I need to do while they do the bare minimum and parade around as if they’re so noble?
Nickel, while I don’t agree with you, I appreciate your input. I like that someone from Europe could put their opinion. I think the EU assuming that the common citizen doesn’t know isn’t a fair assumption. There are more than enough sources to find out a valid argument for either side of this debate. It’s just a matter of deciding which makes more sense when combined. I’ve heard just about every argument, and I believe that while the earth is warming, it is not caused by humans. As for relying on politicians to make all the decisions, that’s dangerous, which is why there are some unfair laws regarding the environment in Europe. Politicians are in the game of politics, so they shouldn’t be trusted to always do what they “believe” is right. As for my children, I believe their existence will be just as good as mine is, since I don’t believe the world is in dire straits like many would have you believe.

Henry Dover answers:

Star for you! I 100% agree with you! I was feeling pretty cynical yesterday, when I answered a question about someone wanting to be “green.”

Here’s the link to THAT question:

http://answers.yahoo.com/question/index;_ylt=AknsqPBgXq3M1zHLEFsZx_Pty6IX;_ylv=3?qid=20071210194356AAUknPU&show=7#profile-info-AA12157050

For my husband and I, who really DO live very “green” lives, I get pretty tired of the folks who do one little thing, and then think they have saved the earth.

CFL bulbs happen to be one of my big pet peeves right now. I too was suckered into them. When I found they were not holding up to their promises, I did some research, and found they are made in China, use more electricity to produce than they will ever save, of course are shipped over the ocean, are toxic waste, since they have mercury in them, last only about 7 months in my house (vs 3 years for the incandecents!), and certainly not the seven perdicted years, and to top it off, are packaged in plastic clam shells instead of the highly recyclable cardboard of incandecents.

And yet people are trying to pass LAWS that state I MUST use them (here in the U.S.)? Oh please!

No vehicle my husband and I drive is newer than 20 years…not a single one. Some are over 40 years old. The tractors we use are even older than that (1930′s for some).

Our vehicles all did their manufacturing environmental damage more than a generation ago. Every one of them can run on the biofuel we produce right here on our farm. If my husband and I needed or wanted to, we could become nearly totally indepentant of foreign oil. Of course funny enough their are laws that prevent us from driving our biofuel on the roads, so we don’t. Be green! Oh no, wait…it’s illegal to be green!

Shall we talk about the fact that I produce very humanely raised and cared for meat goats, and meat rabbits? It is however totally illegal for me to butcher an animal for our customers, right here in very clean, very sanitary open air, and sunshine outdoors. I can however take my animals to be butchered at a slaughterhouse that processes 400 or more animals an hour and allow my customers to pick the meat up there. Of course I know which is cleaner, and much more humane, but that does not matter…it is still illegal for me to butcher for my customers in environmentally green ways. Thank heavens in my state it is still legal for customers to come to my farm and butcher the animals themselves….I’m sure that loophole will be closed eventually.

I agree with you, that a free market is great. Funny thing is, the greener your lifestyle, the more likely you are to run into laws that make it illegal.

Let’s face it….the Government only wants people to become so independant. If people were suddenly driven to become very independant, living green lives, in a mostly agrarian way, it would drastictly lower the taxes the Government brought in, and there-by lower the amount of power the Government has (just think of it!). No, wait…don’t think…it makes the Government nervous when people turn off the TV and think for themselves.

What really drive me nuts are the hypocrits. People who tell me I’m cruel and heartless for killing and butchering a cute widdle bunny wabbit, or widdle goat I’ve raised….while freely admiting they eat meat! So they will consume the flesh of some animal they have no idea what was fed to it, what drugs were pumped into it, nor how it was treated…yet I’m the cruel one?! Oh please!

I hate the hypocrits who preach living a green life, and yet do not do it themselves, indeed spend time jetting about the world (think Gore). I am really botherd by the new trend of people and companies toward buying “carbon credits.” What a HUGE load of horse pucky! Bloody well clean up your own act, don’t pretend it’s all better, because you purchased carbon credits from someone else who REALLY does live a green lifestyle!

Ok….I think I’m going to stop right there, before I say something I shouldn’t.

Great question!

~Garnet
Homesteading/Farming over 20 years

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Portugal, home of the biggest solar plant in the world

In today’s era, when Global warming is on its high, Portugal, a small country in Southern Europe, is taking a bold stake in renewable energies. Thanks to the “great Portuguese sun”, Portugal is now home of the world’s biggest and most powerful solar energy plant. The 11-megawatt plant (located near Serpa, a small town in the country’s southern province of Alentejo) with its 52,000 photovoltaic modules, which producing 20 gigawatt hours of power each year delivers enough electricity to power 8,000 homes, is a part of Portugal’s plan to produce 45 % of its electricity from renewable energy sources. Apart from solar energy, Portugal is also turning to wind and wave power to reduce its oil imports and meet its international commitments to reduce carbon dioxide emissions, having in this matters one of the most ambitious targets in the world.
If God has given to the Portuguese no oil, they will have to suffice only with their wind, their sun and their waves — and it seems that with more than 305 days of sun per year, and 1250 km of Atlantic coastline they are just about to make it.

Duration : 0:1:54


[youtube yDixxAS820U]

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