© 2010 SunPower Corporation Tom Starrs, Managing Director Utility and Power Plants, Americas

© 2010 SunPower Corporation SunPower 2010 – 25 th Anniversary 2 Commercial Power PlantsResidential 2010: Revenue $2.15-$2.25B 5,500+ Employees World-leading solar conversion efficiency 1,500 dealer partners, #1 R&C USA Diversified portfolio: roofs to power plants 550+ MW 2010 production >1.5 GW solar PV deployed 5 GW power plant pipeline

© 2010 SunPower Corporation SunPower Technology Highest Efficiency PV  Up to 50% more energy v. standard PV  Up to 100% more energy v. thin-film PV T0 Single-Axis Trackers  Follows the sun’s path across the sky  Captures up to 25% more of the sun’s energy than fixed-tilt systems  Leading experience and reliability: The world’s most widely deployed single axis tracking system Lowest Impact Technology  Maximizes energy output  Reduces land area required  Minimizes impact to species and habitat 3

© 2010 SunPower Corporation Advantage: PV Advantage: CSP Comments Storage Thermal storage allows extended power production – at substantial additional cost Modularity CSP plants need 250 MW or more for economies of scale – PV is economical at any plant size Water Use CSP requires 800-1,000 gallons/MWh. PV requires none. O &M Multi-MW PV plants can operate unattended, w/ remote monitoring Reliability PV has demonstrated year life with 98%+ availability Price PV was more expensive, now at parity, and trending down PV vs. CSP 4

© 2010 SunPower Corporation California Valley Solar Ranch 5

© 2010 SunPower Corporation Project Location First Solar/ Topaz SunPower/ CVSR California Valley subdivision 7, acre lots Carrizo Plain National Monument 6

© 2010 SunPower Corporation Site Selection – Why California Valley?  Balance between technical, environmental, and policy considerations  Best solar resource in PG&E service territory  315 sunny days/yr / higher elevation / lower temps  Protected from coastal and valley fog / low humidity  Flat, remote site, sufficient for large scale PV  Adjacent to existing high-voltage transmission & highway infrastructure  Restoration of 2 abandoned gypsum mines  Identified in County General Plan Energy Element as “crucial location of high solar potential” 7

© 2010 SunPower Corporation California Valley Solar Ranch Site – 2008 Photo 8

© 2010 SunPower Corporation California Valley Solar Ranch – 2008 Photo 9

© 2010 SunPower Corporation California Valley Solar Ranch – 2008 Photo 10

© 2010 SunPower Corporation Original Design with T20 Trackers Date: Q Arrays & Bldg – 1,935 acres Design emphasis:  Maximize use of flat areas  Minimize grading  Incorporate wildlife corridors GKR impacts:  Not measured  Not known to be present at the time Focus on flattest land Wildlife corridors 11

© 2010 SunPower Corporation Redesign with T0 Trackers – CEQA Alternative #1 Date: Q Arrays & Bldg – 1,793 acres Design emphasis:  Reduce impact on presence of GKR  Widen wildlife corridors  Reduce visual impacts from SR 58 GKR impacts:  50% of known precincts impacted 12

© 2010 SunPower Corporation Redesign to Avoid GKR - CEQA Alternative #2 Date: Q Array & Bldg – 1,977 acres Design emphasis:  Reduce impact on presence of GKR GKR impacts:  25% of known precincts impacted 13

© 2010 SunPower Corporation Redesign to Avoid GKR - CEQA Alternative #3 Core GKR area Proposed addition to project site Date: Q Arrays & Bldg – 2,231 acres Design emphasis:  Consider acquisition of more land to minimize impact on presence of GKR GKR impacts:  Now only 11% of known precincts impacted 14

© 2010 SunPower Corporation “M3” – Mitigated CEQA Alternative #3 15 Date: Q4 – 2010 Design emphasis:  Maximize GKR avoidance  Increase slope tolerance  Refine borders for efficiency  Retain full MW capacity GKR impacts:  Now only 9% of known precincts impacted Proposed addition to project site and expanded corridor Core GKR area

© 2010 SunPower Corporation APPENDIX / PHOTOS 16

© 2010 SunPower Corporation Visual Simulation (looking to Northwest) Visual Simulation of Project looking to Northwest 17

© 2010 SunPower Corporation Visual Simulation (from Hwy 58 looking to East) Visual Simulation of Project from Highway 58 looking East 18

© 2010 SunPower Corporation Construction – Tracker Piers Installed 19

© 2010 SunPower Corporation Construction - Tracker Supports Installed 20

© 2010 SunPower Corporation T0 Tracker - Architecture 21

© 2010 SunPower Corporation 22 T0 Tracker Rows – Close Up View

© 2010 SunPower Corporation 23 T0 Tracker – Close Up View

© 2010 SunPower Corporation Seeding After Construction 24

© 2010 SunPower Corporation Grazing Sheep To Manage Vegetation 25