Solar Power Headed For 45% Annual Growth 402
mdsolar writes "USA Today is running a pretty good article on solar power that gives an overview of the current state of the industry. Highlight include production costs of $1.19/Watt for First Solar, 40% annual cost reductions over the
last five years, revenues expected to triple in three years, and a prediction for 2014 as the year when solar photovoltaic power plants become cheaper than other forms of generation. From the piece: 'Like wind power, solar energy is spotty, working at full capacity an average 20% to 30% of the time. Solar's big advantage is that it supplies the most electricity midday, when demand peaks. And it can be located at homes and businesses, reducing the need to build pollution-belching power plants and unsightly transmission lines. In states such as California, with high electricity prices and government incentives, solar is already a bargain for some customers. Wal-Mart recently said it's putting solar panels on more than 20 of its stores in California and Hawaii. Google is blanketing its Mountain View, Calif., headquarters with 9,212 solar panels, enough to light 1,000 homes.'"
Lots of solar activity these last few years... (Score:5, Informative)
Re:Lots of solar activity these last few years... (Score:4, Informative)
Re:Understatement (Score:2, Informative)
This isn't to suggest that it isn't worth the effort, but I am unclear whether we have the potential to expand facilities in those appropriate areas enough that they could power the entire country well into the future. (For example, solar power in Portland, Oregon is relatively pointless for mass-consumption since you need actual sunlight to generate the electricity).
Re:Understatement (Score:3, Informative)
Where are PV cells from? (Score:2, Informative)
Re:Solar is Limited due to its Low Energy Density (Score:4, Informative)
But with developments in nanotechnology, we could see a drastic drop in the price of solar panels within the next ten years. A solar panel setup that costs US$30,000 now could cost as little as US$3,000, which would suddenly make home power generation very viable indeed. And with MIT and several private groups working on supercapacitor battery packs built from carbon nanotubes, that also makes it viable to store all that power generated in the daytime for use at night.
Re:Where are PV cells from? (Score:4, Informative)
Dude, you're 30 years behind. (Score:4, Informative)
*ahem ahem*
Berkeley Scientists Synthesize Cheap, Easy-to-Make Ultra-thin Photovoltaic Films [lbl.gov]
40% efficient solar cells to be used for solar electricity [physorg.com]
Titania nanotubes could boost solar cell efficiency [nanotechweb.org]
Pink solar cells provide green power on the cheap [engadget.com]
Carbon nanotubes could help make nanoparticle-based solar cells more efficient and practical. [technologyreview.com]
Quantum Dots Enables New Advances in Solar Cell Industry [evidenttech.com]
Green and cheap enough for ya?
Re:It's the grid that's the issue! (Score:2, Informative)
https://eed.llnl.gov/flow/02flow.php [llnl.gov]
22 years to replace net generation (Score:5, Informative)
--
Rent residential solar power: http://mdsolar.blogspot.com/2007/01/slashdot-user
"unsightly transmission lines" (Score:1, Informative)
If you're buying from your electric company... (Score:4, Informative)
Re:Not on my roof (Score:5, Informative)
How many people even live in their houses for that long anymore?
Sure, if you're planning on moving in five years, then you're an idiot to do almost any work on your house. If in doubt, ask a realtor; I believe the investments that tend to help a lot with resale value are things like paint and landscaping, because they improve "curb appeal" a lot, and aren't expensive to do. Solar panels are no different from a kitchen remodeling job in this respect.
Sure, it may add some equity to your home, but not much, especially if the prices DO fall and/or the efficiency of the panels increases significantly during that 10 years. Imagine trying to include your 5 year old computer as part of your home's equity. You're risking a very similar situation with solar.
Apples and oranges. The USA Today article is overstating the rate at which the technology is improving. There's no Moore's Law at work here. It's not like the situation with a computer, where you're guaranteed that it will be obsolete in 5 years.
You're also betting that grid power won't get any cheaper, which may or may not be a good bet, depending on the fuel source of your local power plant.
Where I live (California), the historical trend has been steadily up, in real dollars.
If solar/microgeneration takes off, there could be an abundance of grid power, causing prices to plummet, especially if people start generating more power than they use -- unlikely, but certainly possible if panel efficiencies increase.
No way, not any time in the near future. The number of people who have residential photovoltaic systems installed is extremely small, way too small to lower the market price of power through supply and demand.
especially if people start generating more power than they use -- unlikely, but certainly possible if panel efficiencies increase.
Where I live, the way the deal works is that if you generate more power than you use over the course of 12 months, then you simply don't pay any money to the electric company, but they will never send you a check for the surplus. When you buy a residential PV system, they very carefully size it so that it will cover about 80% of your yearly use. If they sized it too big, it would risk wasting your money by overproducing, which you don't get paid for doing.
Re:$/Watt (Score:5, Informative)
Or it WILL have a meaning.
Currently - the economic terms are based on how much oil we can pump out of the ground in a given time-frame.
When oil (fossil fuels) ceases to be the primary driver of economies - it looks like solar is poised to take over as the #1 technology (with wind/nuclear/geothermal coming in somewhere next); and solar will likely be a function of square-footage-of-sunlight-per-year. The more land a person owns, in a sunny energy-producing region, the more wealth, over time, that person can create. Simply by covering it with solar panels, the more efficient, the better, and praying for sun. Electricity will be a market, there will always be buyers. Locale will probably produce different market rates, because of transmission losses. People will eventually start floating solar farms at sea, and putting them into space (though those, apparently don't scale DOWN well, you need a certain MINIMUM to beam the power via microwaves, efficiently).
But you're right. The $/kw-h calculation looks quite silly when you have solar power. There was a lot of FUD about solar about 5-10 years ago, that solar cells had a reputation for "wearing out" after 10-15 years, or losing power over time. This caused some solar-opponents to create a $/kw-h calculation; how much power you could expect to get out of a solar cell over the lifetime of the cell. Some even claimed that they cost more energy to manufacture than they'd ever produce. This was dead wrong then, and it's dead wrong now: there were some specific kinds of solar cells made in the 1970's that had defects, with dyes that turned brown, etc. Other solar cells went "bad" when their glass enclosures cracked, or their solder joints failed, etc - all things that could be repaired, or engineered for better longevity. These are no longer issues in any modern solar technology. We don't know about these new nanotechnology or thin-film based solar panels. Only time will tell. But it's not likely that they're going to "wear out" like this. For all effective purposes - you manufacture a solar cell, and it produces electricity "forever".
bucks (Score:2, Informative)
Anyway, solar works, and well, within its limitations. Once you have it up and installed the only remaining question you will have is why did you wait. The first time your grid juice goes down and you still have full power, you'll *really* smile about it. Maintenance is pretty easy, occasionally clean the panels off and top off the batts with distilled water. I used good disconnects and actually covered the panels before, or did the maintenance at night on new moon nights when the least amount of power is being generated. Also wait for the batts to cool down a little before opening them up, and pour in the fresh water slowly, and you can read up how to build a proper battery bank housing unit with ventilation, which is required, you use a small DC fan as an air PUSHER into the unit with an exhaust someplace safe, you don't PULL the gassy air out. big PVC pipe is fine, the bottom of your storage bank container gets lined with sintra and put some baking soda down there on the bottom, just in case. I found a bright headlamp worked good for battery maintenance, keeping my hands free,(and goggles of course and rubber gloves, cheap insurance) and a big turkey baster for the last little bits into the cells to get it "just right". Just remember, you got a LOT of amps sitting there, you don't want to weld yourself!
Oh ya, on the batts. Double size your battery bank (or a lot more than what you think, whatever). Figure out what you need, get double, then they are always shallow cycling and they will last a long time, plus install a "desulphator", you can google that up and see which one you might like, they work pretty well from my experience, the batts I have one on are from 98 and still working fine.
Re:Understatement (Score:5, Informative)
"The environmental impact and the safety risk of solar cells are infinitesimally small compared to conventional sources of energy like coal, oil, gas or atomic energy. With the latter, the danger is global (emission of carbon-dioxide) and longterm (for example the problems of disposal of nuclear energy). This is regarding regular operation already. If we think about solar panels running for 30 years that don't produce any pollutants, the environmental damage is obviously kept very limited.
The process of production for solar cells is well developed and tested. From the chemical and toxin point of view, even a mass-production of solar cells will not implicate any significant environmental or health problems."
Where is your counter evidence?
Re:Dude, you're 30 years behind. (Score:2, Informative)
Liquid HF - one of the most dangerous liquids in existence, I might add.
Liquid HCl
Liquid H2SO4
Gaseous Cl2
Gaseous HBr
Gaseous BCl3
Gaseous SF6
Gaseous N2O
Gaseous CHF3
Gaseous CF4
Gaseous BF3
Liquid EKC - I believe EKC220 or EKC245, one of the nastiest liquids you can handle. That's just to start. There's even more exotic chemicals out there that are by no means clean. And let's not forget that photoresist is a known carcinogen, and smells really nasty to boot.
Lead by example (Score:2, Informative)
Re:Solar is Limited due to its Low Energy Density (Score:3, Informative)
--
Rent solar power and save: http://mdsolar.blogspot.com/2007/01/slashdot-user
Re:Crap on... (Score:2, Informative)
Re:Crap on... (Score:3, Informative)
As a quick illustration of the point, one of these systems [altenergystore.com] costs $22,610 before freight and installation, and (depending on where you live) puts out about 20% of its peak wattage over 24 hours. That's roughly 15 kwh per day, or 5475 kwh annually - or, in round figures, about $600 worth of electricity at retail price - and, at the typical surcharges for green power, around $800. The cost of borrowing the money, just for the kit, is around about $1600 a year.
Re:Understatement (Score:3, Informative)
If we were to try to convert to solar now, would end up with exactly the same problems you have with oil production - toxic chemicals released into the environment. solar requires silicon, and that silicon has to be produced in refineries (just google to see the implications of large scale silicon production). once you have the silicon you have to make the cells, which requries certain significantly toxic chemicals including arsenic. obviously i don't have any large scale disasters to point to, because the solar industry is still too small to be more then a blip on the radar. but if we ramped up production to the same scale as oil? you bet we would have a whole bag of new problems to deal with.
Re:Understatement (Score:4, Informative)
You mean, like these guys? [qesc.com] Electricity is nothing more than an energy source...
Now, imagine running a third world steel foundry on solar power.
Ok. Where are you going with this?
That's the gripe many developing nations have with Kyoto - how are they supposed to enter the 20th century if they can use coal fired power?
What is the gripe? Unless you're implying (unsaid) that coal is inherently better. Well, for right now, it's still cheaper. But the price of solar cells continues to drop nicely, which is the point of TFA. And, using solar energy means you don't have to invest in Megabux power grids or railroads for the tons of coal to be used.
Re:You're a special case (Score:2, Informative)
Re:Understatement (Score:4, Informative)
Here is a US government source which says essentially the same thing:
http://www1.eere.energy.gov/solar/man_pro_implica
"Because manufacturers use a wide variety of processes to make PV cells, a wide range of chemicals--some of them toxic or hazardous--are employed in PV cell production. In terms of worker safety and health, simple protective and administrative measures can be used effectively to protect those who produce PV systems. In terms of the environment, the PV production process produces small amounts of waste materials, but this is minimal relative to the emissions from conventional energy sources.
And all this is without even a lot of effort invested (compared to the hundreds of billions spent annually on conventional solutions). Overall, limiting pollution will only get better per unit as production increases and new manufacturing ideas come along (like using vegetable dyes or plastics for PV panels and so on).
Who benefits from FUD being spread about solar power?
Re:Crap on... (Score:3, Informative)
It's carbon-neutral, unlike the coal or natural gas which probably powers your stove.
Re:Understatement (Score:2, Informative)
--
Rent solar power: http://mdsolar.blogspot.com/2007/01/slashdot-user
Solar and transportation (Score:2, Informative)
--
Rent solar power for your home: http://mdsolar.blogspot.com/2007/01/slashdot-user