First there was Moore's Law; now, 'Gore's Law'?

Former US VP sees solar advances on same dramatic path as chip tech

In pushing the US to produce all of its electricity from environmentally friendly sources in 10 years, former Vice President Al Gore points to the accomplishments of the tech industry, especially the dramatic gains in computing capability, as an example of what tech innovators can do.

"Think about what happened in the computer revolution," Gore said on NBC's Meet the Press program on Sunday. "We saw cost reductions for silicon computer chips of 50 per cent for every year and a half for the last 40 years," he said. "We're now beginning to see the same kind of sharp cost reductions as the demand grows for solar cells -- they build new, more efficient facilities to build these solar cells."

Gore, who has formed a group, The Alliance for Climate Protection, for solar cell creation, was referring to Moore's Law, which explains the dramatic gains in compute performance. It stems from a 1965 paper written by Intel co-founder Gordon Moore, which found that the number of transistors put on a chip doubles every 18 months.

But does Moore's Law also apply to the solar energy industry? The short answer is no. As with microprocessor technology, price and performance of photovoltaic solar electric cell is improving. And Gore can clearly point to price drops of solar cells to make his case. But the efficiency of those solar cells - their ability to convert sunlight into electric energy - is not increasing as rapidly.

In 1980, a solar cell cost about US$18 a watt; today that cost ranges roughly from $3 to $4 a watt, although some manufacturers say they can get the price much lower. For instance, XsunX, has said its technology can produce energy for US$1.58 a watt; It's aiming for improvements that would take that price below a $1 a watt.

But solar cells are just one aspect of the cost of solar power. Solar modules, the panels that comprise solar cells, have to be constructed with equipment such as inverters that convert DC into AC power, batteries and increasingly expensive metals, such as copper. Those necessities can double the per-watt cost of what someone pays for electricity from their utility. That's one reason installations are heavily subsidized by the government.

Microprocessors use silicon, as so do solar electric cells. But while microprocessor producers can use improved design and manufacturing techniques to improve chip efficiency and performance, improvements to solar cells means changing materials. "Solar cells are dealing with the material science...," said Bill Johnson, senior research engineer at the Florida Solar Energy Center in Cocoa, Fla. "It's really hard to change the materials."

Although the cost of producing solar cells has declined, their ability to convert sunlight into electricity, remains low. Sunlight delivers about 1 kilowatt of energy per square meter, and only around 10 per cent of it is converted into electricity though some laboratories and companies report higher efficiency results.

Join the PC World newsletter!

Error: Please check your email address.

Our Back to Business guide highlights the best products for you to boost your productivity at home, on the road, at the office, or in the classroom.

Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Patrick Thibodeau

Computerworld
Show Comments

Essentials

Microsoft L5V-00027 Sculpt Ergonomic Keyboard Desktop

Learn more >

Lexar® JumpDrive® S57 USB 3.0 flash drive

Learn more >

Mobile

Lexar® JumpDrive® S45 USB 3.0 flash drive 

Learn more >

Exec

HD Pan/Tilt Wi-Fi Camera with Night Vision NC450

Learn more >

Audio-Technica ATH-ANC70 Noise Cancelling Headphones

Learn more >

Lexar® Professional 1800x microSDHC™/microSDXC™ UHS-II cards 

Learn more >

Lexar® JumpDrive® C20c USB Type-C flash drive 

Learn more >

Budget

Back To Business Guide

Click for more ›

Most Popular Reviews

Latest News Articles

Resources

PCW Evaluation Team

Michael Hargreaves

Windows 10 for Business / Dell XPS 13

I’d happily recommend this touchscreen laptop and Windows 10 as a great way to get serious work done at a desk or on the road.

Aysha Strobbe

Windows 10 / HP Spectre x360

Ultimately, I think the Windows 10 environment is excellent for me as it caters for so many different uses. The inclusion of the Xbox app is also great for when you need some downtime too!

Mark Escubio

Windows 10 / Lenovo Yoga 910

For me, the Xbox Play Anywhere is a great new feature as it allows you to play your current Xbox games with higher resolutions and better graphics without forking out extra cash for another copy. Although available titles are still scarce, but I’m sure it will grow in time.

Kathy Cassidy

STYLISTIC Q702

First impression on unpacking the Q702 test unit was the solid feel and clean, minimalist styling.

Anthony Grifoni

STYLISTIC Q572

For work use, Microsoft Word and Excel programs pre-installed on the device are adequate for preparing short documents.

Featured Content

Latest Jobs

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?