1. The Role of Solar Power in the Great Energy Transition October 19, 2007 Niels Wolter Wisconsin Energy Conservation Corporation

2. Solar Energy Equivalent to an eight inch layer of oil covering the earth each year 100,000 Terawatts strike the earth, human’s use about 15 Terawatts

3. Photovoltaic (PV) Effect Where there is sun there is power! Semiconductors

4. The Power of Solar 250 watts of panel (15 ft 2 ) Powers WI home refrigerator for 50 years Cost of the solar system about $2000 Solar CEOs have promised 50% cost reduction By 2012

5. Germany, with less sun than Wisconsin

6. Solar Power Today solar meets 0.066% of world power needs Tucson Electric Power Co.'s vice president: “Arizona could get 100% of its energy needs from solar by 2100” 4.6 Megawatt plant in Arizona

7. Market Booming U.S. market growing 43% /yr (last 4 years) Wisconsin growing 80% /yr 250 kW in 2006 $68M of venture capital in first 3 quarters, 2007 Increase use 100X, meets <10% of world’s power

8. Future of Solar Electric Power Solar Electric Modules: With each doubling of production cost drop by 19% Cost parity with coal fired power: Today, parts of California and Hawaii 2011, all of California 2015, Germany 2017?, Wisconsin 2020, China Could provide power to the world’s 1.6 billion people living without power

9. Wisconsin

10. Solar Thermal Power 10 cents/kWh today 7 cents/kWh in near future Store heat for 12 hours >60% capacity factor

11. Solar Thermal Power Generation FPL, PG&E and Ausra Commit to Develop 1,500 MW of Solar Power, Sept 28th PG&E Signs Agreement With Solel for 553 Megawatts of Solar Power, July 28th An area 92 x 92 miles could meet all US power needs A 30 MW system is planned for Florida!! Wisconsin Florida

12. Solar Panels in Moroccan Desert Power the World

13. Niels Wolter Solar Electric Program Manager Wisconsin Energy Conservation Corporation nielsw@weccusa.org