Green Options

If you’ve ever flown into LAX on a clear day, you have seen the miles of industrial buildings that stretch out into the desert. Edison International has seen it too, and has taken advantage of one of those empty rooftops to install the largest solar panel installation in the state.

Mounted on the roof of a distribution center owned by Prologis in Fontana, 50 miles east of LA, the 600,000 square feet of panels will produce about 2 megawatts, enough electricity to power up to 1,300 homes. The thin-film panels were installed by First Solar. Even better, this is only the first of about 150 similar projects planned for factory and warehouse roofs in SoCal.

Solar PV manufacturer Oerlikon Solar has pioneered a new thin film solar technology process, which it claims has made its solar cells 7 per cent efficient - a 16 per cent energy improvement over its previous technology. The advance has led to a 50 per cent increase in the capacity of its thin film solar fabrication plant.

So, why is this important? Well, thin film cells are typically a lot cheaper to produce than more common silicon solar cells, but often suffer from significantly lower conversion efficiencies. Oerlikon’s breakthrough moves us a lot closer to the day when thin film becomes more cost-effective than silicon-based panels - which could mean a dramatic rise in the adoption of solar power in homes and businesses.

Scientists at the University of New South Wales have set a new world record by creating the first silicon solar cell to achieve 25% efficiency.

Team leader, Prof. Martin Green of the university’s ARC Photovoltaic Centre of Excellence, says their world-beating solar cell is now a massive six percent more efficient than the next best technology. The record edges the current generation of solar cell technology closer to the theoretical limit of 29% efficiency.

A season has passed since we covered the installation of Magco Inc.’s new thin film solar panel installation. The previous article generated a lot of interest and questions, so it’s time to get back on the roof and report on some real-world figures.

If you need a refresher on thin film solar technology, check out two of our previous posts. The important thing to remember here is that thin film solar is lighter than silicon panels, and uses different wavelengths of light.

In May of 2008, Magco Inc. installed 27kW of Unisolar’s triple-junction laminate panels. That’s 4,900 sq ft of thin film goodness. The building contains a warehouse and offices, and it has a metal roof. The solar panels were literally glued to the roof.

Total installation cost: US$215,000 (including inverter and hiring a master electrician)

Energy produced each month provides about 1/3 of Magco’s total needs. That may not seem like a lot, but recall that this includes a warehouse with associated heating/cooling, machinery and equipment. Magco anticipates producing about US$9,000 each year from the panels. So let’s do the math:

This past week was an eventful one for thin-film solar companies Nanosolar and AVA Solar , which received a total of over $400 million in funding.

Nanosolar, which took in $300 million, has now raised nearly half a billion dollars of capital. The company plans to use the money to expand thin-film solar panel production at its San Jose and Berlin factories.

Thin film solar technology has attracted interest from venture capitalists because of its higher efficiency, lower use of limited silicon, and more easily automated production processes. Now, established Japanese players in the solar arena are getting in the thin film game, followed by companies in China and India, as reported in Renewable Energy World.

• Mitsubishi Chemical already produces materials for the solar industry but sees opportunity to produce the cells

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Many people envision solar power as rigid silicon panels mounted on a roof. With thin film solar cells, you’re more likely to not see them, or even know they’re there. This article is about a real-life thin film solar project.

Not many bloggers are able to witness the technologies we research and write about. It’s one thing to be able to buy afford a cool “green” gadget (usually not very green), but another to see the many forms of solar, wind, geothermal, etc., which are always changing and developing around the world. So when my employer decided to go solar, you might imagine my excitement.

At the moment I work for Magco Inc., a Tecta America company. Tecta is a national commercial roofing corporation that can install green roofs, solar lighting, and solar panels alongside a variety of traditional roofing systems. This solar project is pretty straight forward: our building has a big, flat roof on top of a hill without any shade. You’d have trouble finding a sunnier spot for solar panels.

I was double delighted when I heard that they ordered thin-film solar! Naturally inquiring minds wanted to know: why and what kind?

A May 16 article in the New York Times focused on the debate in Germany regarding whether generous subsidies for solar energy should be continued. Buried in the story was the remarkable fact that Germany has created 40,000 jobs in formerly blighted industrial areas by “turbo-charging” the growth of the solar industry there. Imagine if our government took a leadership role in jump-starting solar production in areas like [...]

New trends spotted at the American Solar Energy Society conference last week in San Diego (courtesy of Illinois Solar Energy Association President Mark Burger, who attended):

• From Bosch, a new generation of solar flat plate collectors (used in solar thermal water heating applications) that can be mounted on the roof at a lower angle, addressing some peoples’ aesthetic concerns. The panels are also lighter-weight and easier to mount even on high roofs. Low-profile collectors were also

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From time to time the National Renewal Energy Lab (NREL) reminds us that the US used to be a leader in innovation. This time it’s in the area of solar thin film technology. The goal with solar thin film technology is to surpass the efficiency level of silicon solar cells. Efficiency refers to the rate at which sunlight falling on a solar cell is converted to electricity. Silicon has been the most efficient material, but it is is expensive and limited, so the world is seeking alternatives. (Picture above from the Dept. of Energy shows thin film manufactured by Iowa Thin Film Technologies.)

NREL has set a new world record using CIGS (copper indium gallium diselenide) thin film, which in tests has reached 19.9 percent efficiency, coming very close to the 20.3 percent level of multicrystalline solar cells.

Who says President George Bush isn't green? Alright, well, most of you — but in a day and age when it's hip to be environmentally-friendly for all the right (and wrong) reasons, the current administration is making green headlines on a more consistent basis. From the Associated Press comes news this morning that Energy Secretary Samuel Bodman is set to announce funding from Bush's Solar America Initiative for growing technology company,

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