The firm’s previous fund was for $127 million, and the Westly Group has been working on raising this current fund for awhile (since mid 2011). Originally the fund was targeted at $175 million. The Westly Group is a little different from other investment firms in that it says its principals have invested more than $50 million of their own money into the company’s funds over the years.

The firm has been one of the more successful cleantech investors out there. Three of The Westly Group’s portfolio companies have gone public on the NASDAQ, including electric car company Tesla, biofuel company Amyris, and Chinese recycling company China Recycling Energy Corporation (CREG). The firm says on its website that “at the end of 2010, we had returned nearly all of invested capital to our limited partners.”

Not all of the Westly Group’s startups have done well, of course. Solar company Amonix has been struggling. Waste-to-fuel startup Enerkem withdrew its IPO plans last year.

With this fund, The Westly Group joins the elite club of venture firms that will continue to make new cleantech investments, including Khosla Ventures, Lux Capital and Braemar Energy Ventures.

Related research and analysis from GigaOM Pro:
Subscriber content. Sign up for a free trial.

• Green IT’s Q4 Winners: Wind Power, Solar Power, Smart Energy
• Green IT Overview, Q2 2010
• The growth and promise of the LED market

This week Reuters published a report, citing anonymous sources, saying that Kleiner Perkins held a meeting with its limited partners (the funds and endowments that put money into Kleiner’s fund) where Kleiner leader John Doerr apologized for a weak fund performance and promised to do better in the future. Kleiner closed on a new $525 million fund a little less than a year ago, and at the time made a bunch of changes.

Kleiner was one of the most aggressive and high-profile venture capital firms to put money into cleantech startups, and at one point had been hoping to invest a third of its funds into green companies. Part of Kleiner’s poor fund performance no doubt has to do with its greentech investments that haven’t made the firm money. And actually a bunch of its investments struggled mightily, like Miasole, Fisker Automotive, and Amonix.

I’ve written a lot on why cleantech and VC is a difficult match. Check out these pieces from over the years:

• “Greentech investing: not working for most”
• “The perils of cleantech investing”
• “We can thank Moore’s Law for the cleantech VC bust”

But one of the more nuanced reasons that I haven’t spent much time on is passion: what I think was investor passion for doing good, for helping fight global warming and for saving the planet. It’s hard to paint that type of enthusiasm as a bad thing. But I think the drive to be known as an investor that makes the world a better place was something that could have distorted the lens used to find investments that will make money.

A lot of the venture investors in Silicon Valley are cut from the same cloth. Many are environmentally-leaning Californians who have kids and who are in their mid-50s and 60s. Many made their fortunes — either through startups or investing — off of the IT sector. The general mindset several years ago was to look for what came next after IT, and greentech provided them with something they could feel good about doing and providing the right legacy for their kids.

That feeling of righteousness is a powerful drug that can cloud rational thinking sometimes. A startup with a potentially game changing innovation that can save the world should succeed — we all want it to succeed — but how much of these investments were hopeful money, blinded by do-gooder passion, as opposed to rational money?

That Doerr put his own personal money into some of these companies as they struggled highlights just how strong the do-gooder pull is and how personal these investments were sometimes. Reuters reported last month that Doerr dipped into his own pocket for the about $2.5 million that struggling solar company Miasole needed to make payroll before it was sold. I’ve heard rumors that Miasole isn’t the only company that Doerr, and Kleiner Partner Ray Lane, put personal funds into. When those companies fail, it’s a slap to the identity of the investor as the savior.

More money going into greentech innovations is the right thing to do from the perspective of the world. The planet needs this technology. But it will likely have to come from non-VC pockets of money, like government funds or project finance.

While Kleiner is the highest profile of the venture firms to make an aggressive bet on cleantech and then (seemingly) retrench, it by no means is the only one. VantagePoint Venture Partners admitted recently that it had to curb its cleantech fund due to lack of interest from investors. Private equity firm Hudson Clean Energy Partners also halted its clean energy fundraising process and the managing director resigned.

Other firms, like Draper Fisher Jurvetson and Mohr Davidow, have shifted strategies to focus on cleantech lite, or cleanweb startups. There’s a few VC firms left that are still trying to do investments in new energy tech and sustainability-focused startups like Khosla Ventures, Braemar Energy Ventures, and Lux Capital, but these are few and far between. The silver lining for those guys is that there’s a lot less competition out there now.

Clearly over-exuberant save-the-world optimism wasn’t the only problem with cleantech. The sector is vast, complex, science-heavy, partly regulated, partly government dependent, and many areas haven’t seen innovation in decades.

We’ll be watching closely to see if some of the cleantech 2.0 strategies are actually working and if those include that same do-gooder passion.

Related research and analysis from GigaOM Pro:
Subscriber content. Sign up for a free trial.

• Green IT’s Q4 Winners: Wind Power, Solar Power, Smart Energy
• Flash analysis: the Fisker debacle and its implications on investing, innovation, and government incentives
• Green IT Q1: Cleantech Breaking Out — and Bracing for Hard Times

In recent months two startups that make this type of concentrating solar technology have struggled. In July Amonix said it was forced to shutter its factory near Las Vegas, and last week GreenVolts said it had laid off more than 60 of its 80 workers and is looking for a buyer. ABB, GreenVolts investor, said it decided to stop funding GreenVolts because of the uncertainty in the solar panel market.

The price of solar panels has plummeted in recent months. While that has led to a boom in solar panel installations in the U.S., it has wreaked havoc on the bottom lines of solar panel manufacturers. First Solar and SunPower are turning to solar project development and solar financing programs to help generate revenue. Solar concentrating system makers have to compete with these low cost solar panels, too.

Like ABB’s former connection with GreenVolts, Semprius has a power company in its corner: Siemens. Last year Siemens said it bought a 16 percent stake in the startup and the companies also have a joint partnership to develop and deploy a “plug-and-play” CPV demonstration system based on Semprius’ solar module arrays and Siemens’ automation and control components.

Semprius’ technology is based around what it calls a micro-transfer printing technology, which stamps semiconducting material onto a substrate, such as glass or plastic (see a video here). The technology is a faster and less expensive way to produce semiconductor devices – in this case solar modules, but it could be extended to other industries such as disk drives – than current manufacturing techniques on the market.

Semprius is focusing first on developing modules for solar concentrating photovoltaics that use gallium arsenide-based, multi-junction solar cells coupled with cheap optics to concentrate solar energy onto the high-efficiency cells. The solar modules have a 33.9 percent conversion efficiency of solar light into electricity, which is one of the most efficient in the world.

Semprius has raised close to $40 million from ARCH Venture Partners, Illinois Ventures, Intersouth Partners, In-Q-Tel, Morgan Creek Capital Management and Siemens Venture Capital, as well as $8 million in state and county incentives. The company says North Carolina Governor Bev Perdue will speak at the opening ceremony next week on September 26, and the factory will eventually create 250 jobs.

Related research and analysis from GigaOM Pro:
Subscriber content. Sign up for a free trial.

• Flash analysis: lessons from Solyndra’s fall
• Green IT’s Q4 Winners: Wind Power, Solar Power, Smart Energy
• A 2011 Green IT Forecast

“What happened is that we had a sudden and unexpected change in support from our strategic investor, and that has affected our access to funding. This was a surprise given our recent progress,” said Gudmundson. GreenVolts raised $35 million in funding in December 2011, with $20 million of that coming from ABB. Gudmundson told me that ABB had pulled out of funding the company.

GreenVolts still has a small core team in place, and the team’s plan is now to look for a buyer of its technology or assets. The leftover staff will also still continue to offer customer support on the systems level.

GreenVolts is a seven-year-old company that makes solar concentrating photovoltaic systems that use both solar cells and lenses to produce electricity. The company makes a fully end-to-end array that includes modules, trackers, inverters, and energy management software and also installs projects.

This year has a been a very difficult one for solar manufacturers, both solar panel makers and companies like GreenVolts that make solar concentrating photovoltaic systems. The price of solar panels has plummeted, which has led to panel makers selling panels for below market rates. (On the flip side that has led to a boost in solar panel installations.)

Solar concentrating photovoltaic systems (also called CPV) are also a new, unproven technology in the solar industry. They’re a hybrid of using mirrors to concentrate sunlight (like some of the large solar farms being built in the deserts use) and small cells that convert the concentrated sunlight into electricity. Startup Amonix, which also makes CPV systems, also recently laid off its staff and shuttered its factory.

GreenVolts has struggled and pivoted a bit over the years. The company moved away from its original carousel tracker CPV design (images of that here) and had been working on a newer CPV tech (check out more photos on Ed Gunther’s site). I visited the company’s offices and test site last month and took these photos of the system.

But GreenVolts had seemed to be getting on track in recent months. The company announced investment from ABB in December, as well as a partnership with ABB where ABB would sell and market its systems. Having the power player in its corner was a validation of its technology. Was. And now having that company pull out its support is devastating to the company.

Related research and analysis from GigaOM Pro:
Subscriber content. Sign up for a free trial.

• Green IT’s Q4 Winners: Wind Power, Solar Power, Smart Energy
• Flash analysis: lessons from Solyndra’s fall
• Green IT Overview, Q2 2010

The Review Journal reports that the factory has been idle since May, and on Wednesday Amonix began selling off equipment. Amonix told us back in January, after news of the layoffs at the factory first came out, that Flextronics, its manufacturing service provider, had cut staffing at the factory by two-thirds so it could modify the production equipment for making a new product later this year. We’ll update this if we hear more from Amonix.

Amonix has had a rough year. The company lost its CEO late last year in a tragic accident.

Amonix

Amonix was able to win a high-profile, large solar project in Colorado that was backed by a $90 million Department of Energy loan guarantee and is owned by a company called Cogentrix (owned by Goldman Sachs). That 30 MW project — one of the largest of its kind using CPV tech — started producing power in Colorado as of May, Dow Jones reported in May.

The company also managed to raise $129.4 million in the spring of 2010 from investors Kleiner Perkins, Westly Group and the Angeleno Group, as well $25 million from Goldman Sachs and MissionPoint. Dow Jones reported that Amonix also had a $9.5 million federal tax credit and a $15.6 million Department of Energy grant. That’s in addition to the DOE loan guarantee for the Cogentrix project.

Amonix’s technology uses lenses to concentrate sunlight 500 times onto triple-junction solar cells. CPV evangelists says that the technology promises to significantly reduce the amount of solar cells needed for a solar project, which make up a big part of the cost of a solar energy system. The systems can also be smaller and more modular so can be built in more diverse places than the massive desert solar thermal plants. That’s the idea anyway — the technology is still nascent, and clearly faces hurdles.

Related research and analysis from GigaOM Pro:
Subscriber content. Sign up for a free trial.

• Flash analysis: lessons from Solyndra’s fall
• Green IT’s Q4 Winners: Wind Power, Solar Power, Smart Energy
• Green IT Overview, Q2 2010

Amonix

A solar startup with a new type of technology, and funding from Kleiner Perkins and the Department of Energy, will start cutting staff next month, reports Dow Jones Venture Wire. Amonix, which makes concentrating solar photovoltaic tech (CPV) that uses mirrors to concentrate sunlight onto solar cells, will cut 76 workers across its offices in California, according to the report.

Earlier this year Amonix, through its manufacturing service provider Flextronics, also laid off about 200 out of roughly 300 workers at its North Las Vegas solar equipment factory. The company said back then that it made the move so it could modify the production equipment for making a new product later this year. I’m not sure if the workers were ever rehired.

Amonix’s technology has gone into a high profile, large solar project in Colorado that was backed by a $90 million Department of Energy loan guarantee and is owned by a company called Cogentrix (owned by Goldman Sachs). That 30 MW project — one of the largest of its kind using CPV tech — started producing power in Colorado already, says Dow Jones.

But other than that win, Amonix has had a rough year. The company lost its CEO late last year in a tragic accident and the company no longer lists a CEO on it website.

The company managed to raise $129.4 million in the Spring of 2010 from investors Kleiner Perkins, Westly Group and the Angeleno Group, as well $25 million from Goldman Sachs and MissionPoint. Dow Jones reports that Amonix also had a $9.5 million federal tax credit and a $15.6 million Department of Energy grant. That’s in addition to the DOE loan guarantee for the Cogentrix project.

Amonix’s technology uses lenses to concentrate sunlight 500 times onto triple-junction solar cells. Each system has 53-kilowatts of generation capacity and is made up of 7 giant modules mounted on a dual-axis tracker. Each module measures 10-ft. by 49-ft and contains 36 sets of lenses and receivers; each receiver contains 30 solar cells.

CPV-evangelists says that the technology promises to significantly reduce the amount of solar cells needed for a solar project, which make up a big part of the cost of a solar energy system. The systems can also be smaller and more modular so can be built in more diverse places than the massive desert solar thermal plants. Well, that’s the idea anyways — the technology is still nascent.

Related research and analysis from GigaOM Pro:
Subscriber content. Sign up for a free trial.

• Green IT’s Q4 Winners: Wind Power, Solar Power, Smart Energy
• Green IT Overview, Q2 2010
• Flash analysis: lessons from Solyndra’s fall

Bloomberg took a look at this project, which is light on details about ENN, a private company which started off as a car rental company in 1989 and morphed into a natural gas distributor, a clean coal technology developer and more recently a solar panel maker and project developer. The company also develops golf courses and other types of real estate for the tourism industry, according to its website.

What we do know

Nevada’s Clark County has agreed to sell 9,000 acres that it owns for $500 per acre, or about one-eighth of its assessed value, according to Laughlin Nevada Times, to ENN to build the solar projects and eco-community. Part of the deal will require ENN to pour in $100 million by 2014 and $1 billion by 2018 to build the project. ENN also will have to secure a contract to sell power from its planned solar project before it can start building on the land, which is located in the town of Laughlin, roughly 100 miles south of Las Vegas.

The deal is unusual not just for the high amount of promised investment from ENN’s founder and chairman Wang Yusuo, a project that the company said will create over 4,000 local jobs. But for a Chinese manufacturer, a factory in the U.S., would probably require significantly higher production costs.

The project is also oh-so political. It’s being touted by U.S. Senate majority leader and Nevadan Harry Reid, who has been a long time supporter of clean energy and green jobs for both Nevada and on the federal level. And like all politicized clean energy, the ENN project sounds like one of those well-meaning efforts to bring jobs to a depressed community, but that probably just won’t work out as planned.

In the past, Reid has also lent a hand to California solar company Amonix, which opened a factory in North Las Vegas in May 2010. Over a year later Amonix laid off about two-thirds of the workers there because it said it needed to modify the machines to make a new generation of solar energy equipment.

Old-skool solar

ENN’s solar experience is also grounded in an aging solar technology. The company entered the solar panel manufacturing market in 2007,  chose to use amorphous silicon and bought equipment from Applied Materials, which got out of that line of solar factory equipment business in 2010 because it couldn’t attract enough buyers.

Amorphous silicon technology isn’t as efficient at converting sunlight into electricity as other technologies, such as the use of silicon or cadmium-telluride, though it’s supposed to be far cheaper to make. But prices for competing technologies, such as silicon and cadmium-telluride solar panels, have fallen quickly in recent years – about 50 percent during 2011 alone because there was an oversupply of them. Many startups that bought amorphous silicon factory equipment from Applied and other suppliers either went out of business or stay small. A major maker of amorphous silicon solar panels, Energy Conversion Devices in Michigan, filed for bankruptcy in February.

ENN is not a brand new entrant to the U.S. market,. Last November, the company announced the completion of a 4.3 MW solar power project in New Jersey that used its solar panels.

The company also has signed several technology and project development agreements with Duke Energy, when both announced a broad agreement in 2009 to work on various renewable energy, clean coal and smart grid projects, including solar power plants in the United States. In May last year, two companies said they also would work together to test technologies for creating smart cities in China and the U.S.

Photo courtesy of ENN Group, Solopower, and Suntech.

Related research and analysis from GigaOM Pro:
Subscriber content. Sign up for a free trial.

• Green IT Overview, Q2 2010
• Green IT’s Q4 Winners: Wind Power, Solar Power, Smart Energy
• Report: Cleantech’s Third-Quarter Growing Pains

SunPower calls the new offering its C7 Tracker, which includes a set of curved mirrors that concentrate and direct sunlight onto a row of solar cells to produce electricity (see video). This whole set up sits on top of a tracker that rotates the mirrors and cells to follow the sun’s movement – CPV technology works best under direct sunlight in cloudless days.

The new system concentrates the sunlight seven times and uses SunPower’s silicon solar cells, which are 22.8 percent efficient. The use of the mirrors means SunPower can use smaller solar cells to produce the same amount of energy. The company says a 400 MW project that uses its C7 Tracker will need less than 70 MW of its solar cells. The C7 Tracker also comes with a wireless monitoring and control system.

A historical connection

Using trackers has been a SunPower specialty. The company has designed trackers for its conventional silicon solar panels for years. The company often uses the trackers for large-scale projects on the ground (as opposed to the rooftop). Its tracker design experience is an advantage. A tracker for a CPV system must have a precise aim at the sun to harvest direct sunlight. A tracker for conventional solar panels doesn’t have to be so accurate in order to produce ample power because those solar panels can make use of indirect and reflected light.

SunPower is working on lining up utilities as customers – the company not only sells equipment to distributors and developers, it also develops solar farms.

The company made it known that it was interested in CPV earlier and showed off its early designs at conferences last year. It’s no stranger to the technology long before that. SunPower worked on a CPV technology in the early 90s but found little customer interest. It then shifted its focus to develop solar cell technology that led SunPower to become the producer of the most efficient silicon solar cells today.

Most of the solar panels today are made with silicon cells. The price of silicon used to be sky high about six years ago, and that prompted a slew of startups and investors to find ways to reduce the cost of solar cell materials. CPV seemed promising because less solar cell materials are needed when you can use mirrors to concentrate sunlight and produce the same amount of electricity. But as with many early-stage technology approaches, many CPV companies took more time and money to nail down their designs, and during that time the price of silicon fell dramatically and rendered traditional solar panels a whole lot cheaper.

Gaining respect

In the past two years, some CPV companies were able to complete the first installations of their equipment and that was important to show there was customer interest for CPV. SolFocus built a 1 MW project at a community college in California in 2010 – that was the largest CPV project in the country then. Rival Amonix has since broken that record with a 2 MW system it completed earlier this year. The company also is supplying its equipment for a 30 MW project in Colorado by Cogentrix, which has gotten a $90.6 million federal loan guarantee for the project.

Those early installations, if they perform as promised, will help to convince banks and utilities to invest in CPV technology.

The use of curved mirrors to concentrate sunlight isn’t a new concept – many companies have been developing various versions of concentrating solar technologies that use flat or curved mirrors. Companies such as BrightSource Energy uses the mirrors to concentrate the sunlight to heat water and produce steam, which is then piped to drive a turbine generator for electricity production (this type of technology is called concentrating solar thermal).

Although CPV technology is competitive against other solar technologies, it can deliver that cheaper electricity only in parts of the world that see a lot of direct sunlight. In other words, the technology doesn’t like cloud covers, where as conventional solar panels can still produce some electricity on cloudy days. As a result, the best locations for CPV power projects include the American Southwest, parts of Middle East, southern Europe and Australia.

Photos courtesy of SunPower (first two images) and Amonix

Related research and analysis from GigaOM Pro:
Subscriber content. Sign up for a free trial.

• After Solyndra: analyzing the solar industry
• Flash analysis: lessons from Solyndra’s fall
• A 2011 Green IT Forecast

Alta Devices is combining the material gallium arsenide, which is already pretty efficient at converting sunlight into electricity, with a process that can harvest additional energy from the material. The ultra-efficient gallium arsenide cell is also super-thin yet able to convert more sunlight into energy than silicon and cadmium telluride cells: the two most widely used solar cell materials today.

An Alta cell is about 1 micron thick compared with 150-200 microns for silicon cells and roughly 15 microns for cadmium-telluride, Norris said. Making thinner cells is a goal for all cell developers because it cuts costs.

Alta has achieved 28.2 percent efficiency with its cells, an efficiency that breaks the previous record of 26.4 percent for gallium arsenide cells and has been verified by the National Renewable Energy Laboratory, the company said. At 28.2 percent, the cells are far more efficient than the most efficient silicon solar cells available on the market today. SunPower is making solar cells with 22.4 percent efficiency and panels at roughly 20 percent efficiency, the company announced earlier this month. First Solar, the world’s largest cadmium telluride cell maker, is making panels at 11.7 percent efficiency. Panel efficiencies tend to be 10-12 percent less than cell efficiencies.

The startup chose to use gallium arsenide because it is naturally more efficient at converting sunlight into electricity compared to silicon and other materials. But the chief reason gallium arsenide isn’t commonly used in solar cells today is its cost. Because of its high price, solar cell developers typically have used very little of it and only in combination with other materials to develop a type of multilayer cells that are found in solar electric systems that use mirrors to concentrate sunlight by hundreds of times onto the cells.

Alta’s technology was developed out of research from co-founder Eli Yablonovitch, a professor at UC Berkeley, who worked on a technique called “epitaxial lift-off,” which makes it possible to create very thin gallium-arsenide cells with internal structures that can squeeze more power from the sunlight that enters the cells. The tech enables a photon to produce more electricity after it has entered a solar cell, because when photons enter a cell, they tend to knock loose the electrons in the material and create holes that can hold those electrons. The free electrons can be collected and create current, which then combines with voltage from the electrical field in the cell to form power.

Not all the electrons in the process can be collected to create electricity, but the electrons that can’t be collected can be formed into photons, and can be used to knock loose more electrons to increase the overall power output of the cell, Norris said. The process of an electron becoming a photon again (after rejoining the hole) is called “radiative recombination. “It’s called photon recycling. What we focus on is making use of the primary (energy) loss mechanism inside the material,” Norris said.

Alta is still in the product development stages: It concocted the best cells in its lab. The company plans to build a pilot factory in Sunnyvale, Calif., and start producing cells next year, Norris said. The cells will be entombed in plastic materials to keep moisture out and make the cells flexible for many applications, and Alta wants to sell cells to companies who will assemble them into panels or embed them in roofing and other building materials. Alta also will likely produce its own panels as well.

The plan is to start commercial shipment in 2013.  “Nobody has commercialized a gallium arsenide thin film yet. We are going to be the first to do that.” Earlier this year, Alta said it had raised $72 million from investors including Kleiner Perkins, Dow Chemical and a joint venture among GE, ConocoPhilips  and NRG Energy.

In Monday’s announcement, Alta Devices mentioned research by one of its co-founders and Caltech professor Harry Atwater, who is presenting a paper about silicon microwires. The silicon microwire research is actually not related to what Alta Devices is working on, Norris said.

Image courtesy of the NASA Goddard Space Flight Center

Related research and analysis from GigaOM Pro:
Subscriber content. Sign up for a free trial.

• Flash analysis: lessons from Solyndra’s fall
• Green IT’s Q4 Winners: Wind Power, Solar Power, Smart Energy
• After Solyndra: analyzing the solar industry

Semprius already had a partnership with Siemens to jointly develop and deploy a “plug-and-play” CPV demonstration system based on Semprius’ solar module arrays and Siemens’ automation and control components. Last year, the companies said the systems are planned to be installed in numerous test sites, including at utility, commercial, and government facilities. In Siemens’ announcement this morning, it says it will act as a strategic investor to help Semprius develop the technology.

Semprius’ innovation is around what it calls a micro-transfer printing technology, which rapidly stamps semiconducting material onto a substrate, such as glass or plastic (see a video here). The technology is a faster and less expensive way to produce semiconductor devices – in this case solar modules, but it could be extended to other industries such as disk drives – than current manufacturing techniques on the market.

The startup is focusing first on developing modules for solar concentrating photovoltaics that use gallium arsenide-based, multi-junction solar cells coupled with cheap optics to concentrate solar energy onto the high-efficiency cells.  The system will use dual-axis trackers, which could be a tech easily supplied by Siemens. Semprius is also backed by investors ARCH Venture Partners, Applied Ventures, and Illinois Ventures.

Siemens owns substantial clean power and solar technology, bought solar thermal company Solel back in 2009 and has been developing solar thermal products for various plants going online soon.

Solar concentrating PV hasn’t gotten a lot of respect in the past, but in recent months has gotten a growing amount of attention and interest via a series of projects, power contract announcements and a $90.6 million federal loan guarantee for a large 30 MW solar power plant in Colorado. Globally, around 690 MW worth of solar concentrating PV projects are in development, including 28 MW in operation, 41 MW under construction, and another 621 MW under development, according to GTM Research.

Solar concentrating PV aims to cut costs by using slivers of solar cells that can covert high amounts of sunlight into electricity. But the tech also has more moving parts than traditional solar panels (more things that can break and have to be fixed), and the cost of silicon isn’t very high at the moment. Currently, the three solar concentrating PV technology front-runners are Amonix, SolFocus and Soitec’s Concentrix.

Image courtesy of SolFocus.

Related research and analysis from GigaOM Pro:
Subscriber content. Sign up for a free trial.

• Green IT’s Q4 Winners: Wind Power, Solar Power, Smart Energy
• A 2011 Green IT Forecast
• 7 Things That Spell Growing Pains for 2011 Greentech