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BP Solar Sticks with Silicon

Continued from page 1

By Kate Greene

Thursday, October 19, 2006

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TR: But there's still the cost issue of installing solar modules. What approaches are you taking to reduce costs there?

LE: There are some innovations in the value chain that we're on the front edge of, including how you access your customer. In the U.S. we are selling products in more than 250 Home Depots, in California, New Jersey, and New York. Having in-store solar-sales capability basically simplifies the value chain so you don't have BP Solar selling to a group that sells to another group that goes out and markets the product. There's only the installer in between, and we endorse their capabilities.

Another aspect that we're looking at is how you actually construct a frame [for a solar module]. Rather than using extruded aluminum framing, we're looking at a cast polyurethane mold. It's stronger, it's lighter, it's easier to install, and it looks cool. And if you were really into the architecture, you could have different colors, different types of arrays. [Aesthetics] is a big barrier for going mainstream within solar because people don't want to feel like they've got a bunch of screen doors screwed into their roofs. And then the ultimate is if you make the solar as part of the roof, so you bring together building materials with the photovoltaic industry and say, Let's build a new roofing material that's pre-wired for new construction.

TR: Do you think that in the next couple of years we'll see more economically successful solar efforts?

LE: What's different now is that we've had a few years of high oil prices, we've had increased public pressure for policies that will allow for energy independence, and the environmental reality of making a difference in the carbon footprint of the planet is more accepted. So I think all those say there will be a big jump in continued demand. What we see is the demand forecast is significantly higher this year--and it just keeps getting bigger as more countries and more states enact policies to enable continued growth.

Comments

  • Solar keps getting better
    An 8% improvement in the price/performance ratio is good, but marginal. Better is BP's focus on the whole value chain.  Integrating solar panels with the building, replacing the roof rather than adding on to it, is a critical next step.

    An even better next step:  integrating solar's DC output with all the DC electronics in the house (or office).  Cut out all the costs of converting to AC and back to DC.  Let's do it!
    Rate this comment: 12345

    MarkShapiro
    10/19/2006
    Posts:13
    Avg Rating:
    4/5
    • Re: Solar keps getting better
      How about thinking broader than just generating electricity?  Why not water cool the rooftop panels (they probably lose a lot of energy as infrared) and have part of the electrical output of the solar panel drive a water pump to pre-heat water for the home.  It's basically taking a page from the co-generators.  Total efficiency would then be higher for the panel since more energy is being harvested.  
      Rate this comment: 12345

      kearns
      10/19/2006
      Posts:29
      Avg Rating:
      4/5
      • Re: Solar keps getting better
        By using Poly instead of aluminum, you can actually design the panel as to allow water channels be integrated into the overall design to accomplish the co-gen - thus heating both a fluid and converting the electricity via the glass and gaining some aethetics to boot.
        Rate this comment: 12345

        mkogrady
        10/19/2006
        Posts:198
        Avg Rating:
        3/5
  • . . . and better
    By all means, collect the heat as well.  Integrate it with domestic hot water and space heating.  It would be yet more efficient with concentrator photovoltaics such as those using fresnel lenses and non-imaging concentrators.

    And, any light that gets through the cells or around the edges between the cells can be used to illuminate the building.
    Rate this comment: 12345

    MarkShapiro
    10/20/2006
    Posts:13
    Avg Rating:
    4/5

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