Solar Technologies for Now and the Future

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Solar Technologies for Now and the Future

• Sustainable Silicon Valley
• Educational Forum
• April 28, 2006

Bill Scott Akeena Solar
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ENERGY EFFICIENCY, SOLAR AND DEMAND RESPONSE
Santa Clara Valley Water District, San Jose May
5, 2006 830am to 230pm

• NEW UTILITY ENERGY INCENTIVES
• BUNDLING STRATEGIES FOR MAXIMUM PAYBACK
• Display Booths/Networking

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ENERGY EFFICIENCY, SOLAR AND DEMAND RESPONSE

• BEST PRACTICES for efficiency rebates and
  incentives, new solar power federal incentives
  and state rebates, and demand response in your
  energy portfolio.  Learn cost-effective
  strategies to gain the quickest investment
  payback.
• TOP ENERGY EXPERTS   PGE Efficiency and Solar
  Programs, Barry Cinnamon - President, California
  Solar Energy Industries Association, SCVWD Energy
  Team and many more
• CUTTING EDGE PRODUCTS AND SERVICES Tools and
  advice from our sponsors to achieve your energy
  goals! 
• Details and registration info at
  http//www.svlg.net/Events/energyincentives.htm  

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Solar Electricity Product Overview

• PV
• Crystalline Si
• Amorphous Thin Film
• Other
• BIPV
• Concentrating Solar Power
• Centralized Solar Thermal Power

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Crystalline Silicon

• Polycrystalline Si
• Made from melting Si into ingots, slicing off
  wafers
• Cell efficiencies of 14 - 15
• Widest use
• Monocrystalline Si
• Grown crystals, more uniform structure
• Higher cell efficiencies (17 - 22)
• Higher cost and better space utilization
• Most often manufactured in framed modules

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Amorphous Thin-Film Si

• Si solution layered onto various substrates
• Conversion efficiencies of 9 to 12
• Some framed module products, others bonded to
  flexible roofing materials
• Very uniform appearance, but less effective space
  utilization
• Less costly to produce than crystalline modules

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Other Materials

• CIGS - Copper Indium Gallium Diselenide
• Applies as thin-film to various substrates
• Still in development (Nanosolar, Miasole,
  Daystar, others)
• Efficiencies expected to better Amorphous
  Thin-Film Si (14 ?)
• Expected to be less costly per watt, more ft2
• CIS - Copper Indium Diselenide
• Still in development, efficiencies of 12 to 14
  anticipated
• Polymer (plastic) PV materials Konarka
• Wide range of point applications

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Building Integrated PV

• Roof tile replacements
• Solar glass
• Thin film bonded to single-ply membrane roofing
  material

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Concentrating Solar Panels

• Fresnel lenses in tracking panels concentrate
  light 5001 on smaller amount of Si (Xerox PARC
  Research)
• Tracking mirrors focus sunlight on stationary Si
  (Energy Innovations Sunflower)

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Centralized Solar Power
11
25 m2
12
300 m2