A new study questions the safety of the solar company's panels. But pricing of silicon may be a bigger problem
FIRST SOLAR HAS WORKED MIGHTILY in the last year to reassure investors that its "thin-film" solar-energy panels will continue to enjoy a cost advantage over rivals' increasingly cheap silicon-based wares. Shares of Tempe, Ariz.-based First Solar (ticker: FSLR) have yo-yoed from 170 to 100 and then back to about 140 recently, as the company's gross margins veered from 56% to 42% and then back up to 50% for the March 2010 quarter—reflecting the competitive pressures that we predicted when the price of raw silicon began to drop ("Nightfall Comes to Solar Land," March 30, 2009).
First Solar panels at work in Germany. Competitors now are challenging its prices and the safety of its products.
But another front is heating up in First Solar's fight with competitors like Suntech (STP), Trina Solar (TSL) andYingli Green Energy (YGE)—a debate over the long-term safety of First Solar products. First Solar's panels use cadmium-tellurium technology while the others use silicon wafers. The company has presented tests to show that the highly toxic cadmium is safely sealed in glass, and First Solar runs a voluntary program that will reclaim the panels at the end of their 30-year lives. Yet some silicon-panel rivals have argued for the treatment of First Solar products as hazardous waste.
On July 28, the California Department of Toxic Substances Control will hold a workshop in Sacramento to discuss how solar panels should be exempt from the state's hazardous-waste category. A non-profit group concerned about cadmium toxicity released a lab study last Thursday that asserts that cadmium-tellurium panels crushed in a landfill would leak the toxic substance at levels exceeding California's allowed levels.
The report was commissioned by The Non-Toxic Solar Alliance, a group organized by a University of Stuttgart professor named Jürgen Werner. The analysis (which is available atwww.ntsa.eu/Downloads_Links.html) was conducted by an outfit called Sierra Analytical Labs in Laguna Hills, Calif. It crushed the product samples and immersed them in a mildly acidic solution (with a pH level of 5) meant to replicate the liquid runoff in a landfill. The resulting cadmium levels, said the lab, were almost three times the threshold considered hazardous.
Other lab studies had concluded that, under realistic conditions, the cadmium-based panels did not release the toxic substance at dangerous levels, including studies sponsored by the U.S. Dept. of Energy.
First Solar's vice president of sustainable development, Lisa Krueger, says the company welcomes attention to the end-of-life handling of solar cells and notes that First Solar has established a trust to prefund the recycling of its products. The regulation of First Solar panels when they eventually become waste does not affect the company's production and sale of the products.
That solar panels make questionable landfill is nothing new, says Vasilis M. Fthenakis, a scientist at Brookhaven National Lab and an engineering professor at Columbia University who has studied the life cycle of solar panels. "All types of modules will fail those tests," he says of the recently-released study. "We don't advocate for any photovoltaics to be thrown into landfills. We advocate for all photovoltaic panels to be recycled."
So it's very possible that cadmium turns out to be less of a problem for First Solar than the still-falling prices of silicon used by its rivals
FIRST SOLAR HAS WORKED MIGHTILY in the last year to reassure investors that its "thin-film" solar-energy panels will continue to enjoy a cost advantage over rivals' increasingly cheap silicon-based wares. Shares of Tempe, Ariz.-based First Solar (ticker: FSLR) have yo-yoed from 170 to 100 and then back to about 140 recently, as the company's gross margins veered from 56% to 42% and then back up to 50% for the March 2010 quarter—reflecting the competitive pressures that we predicted when the price of raw silicon began to drop ("Nightfall Comes to Solar Land," March 30, 2009).
First Solar panels at work in Germany. Competitors now are challenging its prices and the safety of its products.
But another front is heating up in First Solar's fight with competitors like Suntech (STP), Trina Solar (TSL) andYingli Green Energy (YGE)—a debate over the long-term safety of First Solar products. First Solar's panels use cadmium-tellurium technology while the others use silicon wafers. The company has presented tests to show that the highly toxic cadmium is safely sealed in glass, and First Solar runs a voluntary program that will reclaim the panels at the end of their 30-year lives. Yet some silicon-panel rivals have argued for the treatment of First Solar products as hazardous waste.
On July 28, the California Department of Toxic Substances Control will hold a workshop in Sacramento to discuss how solar panels should be exempt from the state's hazardous-waste category. A non-profit group concerned about cadmium toxicity released a lab study last Thursday that asserts that cadmium-tellurium panels crushed in a landfill would leak the toxic substance at levels exceeding California's allowed levels.
The report was commissioned by The Non-Toxic Solar Alliance, a group organized by a University of Stuttgart professor named Jürgen Werner. The analysis (which is available atwww.ntsa.eu/Downloads_Links.html) was conducted by an outfit called Sierra Analytical Labs in Laguna Hills, Calif. It crushed the product samples and immersed them in a mildly acidic solution (with a pH level of 5) meant to replicate the liquid runoff in a landfill. The resulting cadmium levels, said the lab, were almost three times the threshold considered hazardous.
Other lab studies had concluded that, under realistic conditions, the cadmium-based panels did not release the toxic substance at dangerous levels, including studies sponsored by the U.S. Dept. of Energy.
First Solar's vice president of sustainable development, Lisa Krueger, says the company welcomes attention to the end-of-life handling of solar cells and notes that First Solar has established a trust to prefund the recycling of its products. The regulation of First Solar panels when they eventually become waste does not affect the company's production and sale of the products.
That solar panels make questionable landfill is nothing new, says Vasilis M. Fthenakis, a scientist at Brookhaven National Lab and an engineering professor at Columbia University who has studied the life cycle of solar panels. "All types of modules will fail those tests," he says of the recently-released study. "We don't advocate for any photovoltaics to be thrown into landfills. We advocate for all photovoltaic panels to be recycled."
So it's very possible that cadmium turns out to be less of a problem for First Solar than the still-falling prices of silicon used by its rivals
