Navigation Links
Affordable solar?
Date:12/12/2011

It's time to stop thinking of solar energy as a boutique source of power, says Joshua Pearce.

Sure, solar only generates about 1 percent of the electricity in the US. But that will change in a few years, says Pearce, an associate professor of electrical engineering and materials science at Michigan Technological University. The ultimate in renewable energy is about to go mainstream.

It's a matter of economics. A definitive new analysis by Pearce and his colleagues at Queens University in Kingston, Ontario, shows that solar photovoltaic systems are very close to achieving the tipping point in many regions: they can make electricity that's as cheap sometimes cheaperthan what consumers pay their utilities.

Here's why. First, the price of solar panels has plummeted. "Since 2009, the cost has dropped 70 percent," says Pearce. But more than that, the assumptions used in previous studies have not given solar an even break.

"Historically, when comparing the economics of solar and conventional energy, people have been very conservative," says Pearce.

To figure out the true cost of photovoltaic energy, analysts need to consider several variables, including the cost to install and maintain the system, finance charges, how long it lasts, and how much electricity it generates. Pearce and his colleagues performed an exhaustive review of the previous studies and concluded that the values given those variables were out of whack.

"It is still a common misconception that solar PV technology has a short life and is therefore extremely expensive," he said. However, PV panels are solid-state electronic devices with no moving parts and should last a long time. "Based on the latest long-term studies, we should be doing our economic analysis on a 30-year lifetime at minimum," Pearce said.

In addition, most analyses assume that the productivity of solar panels will drop at an annual rate of 1 percent or more, a huge overestimation, according to Pearce. "If you buy a top-of-the-line solar panel, it's much less, between 0.1 and 0.2 percent."

Finally, "The price of the solar equipment has been dropping, so you'd think that the older papers would have higher cost estimates," Pearce said. "That's not necessarily the case." Equipment costs are determined based on dollars per watt of electricity produced. Very recent studies set the amount between $2 and $10. The true cost in 2011, says Pearce, is under $1 per watt for solar panels on the global market, though system and installation costs vary widely. In some parts of the world, solar is already economically superior, and the study concludes that solar will become an increasingly economical source of electricity over expanding geographical regions.

In regions with a burgeoning solar industry, thanks to government programs that pay a premium for renewable energy, there are lots of solar panel installers, which heats up the market. "Elsewhere, installation costs have been high because contractors will do just one job a month," says Pearce. "Increasing demand and competition would drop installation costs considerably."

Furthermore, economic studies like Pearce's don't generally taken into account solar energy's intangible benefits, reduced pollution and carbon emissions. And while silicon-based solar panels do rely on a nonrenewable resourcesandthey are no threat to the world's beaches. It only takes about a sandwich baggie of sand to make a roof's worth of thin-film photovoltaic cells, Pearce said.

Based on the study, and on the fact that the cost of conventional power continues to creep upward, Pearce believes that solar energy will soon be a major player in the energy game. "It's just a matter of time before market economics catches up with it," he says.


'/>"/>

Contact: Joshua Pearce
pearce@mtu.edu
906-487-1466
Michigan Technological University
Source:Eurekalert  

Related biology news :

1. On the road to creating an affordable master instrument
2. Reinventing the toilet for safe and affordable sanitation
3. Would convenient access to affordable fresh produce improve eating habits?
4. Purple Pokeberries hold secret to affordable solar power worldwide
5. Forsyth scientist receives major grant to support rapid, accurate, affordable test for tuberculosis
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Affordable solar?
(Date:2/3/2017)... ANTONIO , Feb. 3, 2017  Texas Biomedical Research ... Dr. Larry Schlesinger as the Institute,s new ... Texas Biomed effective May 31, 2017. He is currently the ... Director of the Center for Microbial Interface Biology at Ohio ... Schlesinger as the new President and CEO of Texas Biomed," ...
(Date:2/1/2017)... 2017 IDTechEx Research, a leading provider of ... the availability of a new report, Sensors for Robotics: Technologies, ... Reading ... ... Source: IDTechEx Report "Sensors for Robotics: Technologies, Markets and Forecasts 2017-2027: ...
(Date:1/25/2017)... NEW YORK , Jan. 25, 2017 /PRNewswire/ ... and Access Management (IAM) lifecycle is comprised of ... infrastructure for the purpose of maintaining digital identities ... enterprise resources and applications. There are significant number ... compliance from time to time by optimizing processes ...
Breaking Biology News(10 mins):
(Date:2/22/2017)... ... February 22, 2017 , ... Park Systems , a leader in ... for all SPIE attendees and Park customers on Feb. 27, 2017 from ... San Jose Convention Center. The luncheon will feature a talk on Automated AFM ...
(Date:2/22/2017)... CINCINNATI , Feb. 22, 2017 Scientists ... drives inflammation and organ damage in Gaucher and maybe ... fewer risks and lower costs than current therapies. ... Children,s Hospital Medical Center , which also included investigators ... , report their data Feb. 22. The study ...
(Date:2/22/2017)... , ... February 22, 2017 , ... ... and development of precision treatments for neurodegenerative diseases, today announced it has issued ... ProMIS approach.” This is one of a series of commentaries from ProMIS’s scientific ...
(Date:2/22/2017)... , ... February 22, 2017 , ... LabRoots , ... scientists from around the world, is pleased to announce the launch of a new ... and mathematics (STEM) fields. , This merit-based scholarship is open to all high school ...
Breaking Biology Technology: