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Just nine days into the new year, SunPower has already come out with what should be viewed as positive news — so why has its stock stumbled? The company has unveiled construction plans and a financing deal with GE Energy Financial Services, yet its shares have […]

Just nine days into the new year, SunPower has already come out with what should be viewed as positive news — so why has its stock stumbled? The company has unveiled construction plans and a financing deal with GE Energy Financial Services, yet its shares have slumped 20 percent since the first trading day of 2008. But SunPower is not alone. Other solar companies, especially many of the newly public Chinese firms such as Trina Solar, Yingli Green Energy and Solarfun Power Holdings, have seen their stocks fall as well.

We’re thinking solar is about to swing into one of those boom-and-bust cycles, familiar to those in the housing or semiconductor industries, and investors should expect more volatility ahead. As in those industries, building solar cells is a big, capital intensive business and economies of scale are the primary way to make money. When demand starts to fall or there’s too much supply, it takes a while to adjust the course. It’s about time for solar to begin its adjustment.


Much as chip companies in the late 90s faced the rise of Taiwanese foundries as competitors, solar cell manufacturers have seen an influx of low-cost competition from the east. In 2007, several Chinese solar cell companies hit the American public markets. SunPower has some innovation and design expertise that can protect its margins, but first it has to get large enough to wrangle the best prices out of materials suppliers, as well as build out factories it can run at full capacity.

SunPower, with its plans for a manufacturing plant in the Philippines, is offsetting some of its costs, but it still has net profit margins over the last 12 months of only 2.5 percent. That’s pretty slim, and compared with some of the Chinese companies in this field, whose net profit margins have ranged anywhere from 6 percent to 30 percent over the last 12 months, SunPower looks overvalued. It also has little room for error in its business plan.

With planned capacity for solar manufacturers due to top 12 GW in the next year and demand estimated to range between 3GW and 5GW, there is also the real danger of too much supply. That’s good for buyers of solar cells, but bad for sellers. The latest energy bill, signed in December by President Bush, didn’t renew the solar tax credit, which means demand won’t be spurred by subsidies. Unless oil continues to rise beyond $100 a barrel, making solar energy cheap by comparison, this year may be rough for SunPower and its stockholders.

SunPower’s stock had flown higher than many of its competitors, which is why its fall in the last few days has been so dramatic — it has seen $1.6 billion erased from its market cap. SunPower may be a harbinger for a solar bust, but much like the chip industry, whose products are always in demand, solar should eventually rebound with slightly more realistic valuations.

  1. While I don’t disagree that solar stocks are over-valued and due for a correction, your rational is slightly off base. An excess of manufacturing capacity does not necessarily mean a supply/demand imbalance. In a market where manufacturers are supply constrained (polysilicon shortage) one would expect there to be excess capacity. In addition, with the exception of Suntech few Chinese companies are manufacturing cell technology. Many are simply buying cells from Europe and manufacturing modules. Lastly, while the failure to extend the ITC will have a significant impact upon the domestic demand, modules are a commodity in a global market. The US is not the primary market for most soalr technology. Again, I don’t disagree that many solar stocks (First Solar) are due for a correction.

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  2. Stacey Higginbotham Thursday, January 10, 2008

    Dan I’m glad we agree on the valuation and I do agree that the ITC will have a local, rather than global affect, but I think it may affect stocks trading on U.S. markets simply based on perception. Also, with Germany phasing out its solar subsidies, demand in one of the, if not the, largest market for solar could fall. Since most of the solar panel manufacturers have supply contracts already in place for their polysilicon supplies that match with their planned manufacturing capacity, I’m not sure how much their growth will be constrained by that in the near term. But you’re right about the Chinese guys. Maybe the comparison was too broad.

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  3. [...] 16th, 2008 at 10:16 am in Energy We’ve seen solar stocks take a hit so far this year. SunPower’s shares have slumped 20 percent since the first trading day of 2008, and Chinese solar companies Trina Solar, Yingli Green Energy [...]

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  4. Green energy is definitely the best solution in most cases. Technology like solar energy, wind power, fuel cells, zaps electric vehicles, EV hybrids, etc have come so far recently. Green energy even costs way less than oil and gas in many cases.

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  5. I found your blog on google and read a few of your other posts. I just added you to my delicious. Keep up the good work. Look forward to reading more from you in the future.

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  6. [...] checking out and their number is toll free 1-800-SUNPOWER (786-7693). Their stock price has been bouncing around a little bit recently but as one of the big players in the space we are confident in their [...]

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