Tom Starrs Managing Director Utility and Power Plants

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

Sun. Power 2010 – 25 th Anniversary 2010: Revenue $2. 15 -$2. 25 B World-leading solar conversion efficiency 5, 500+ Employees Diversified portfolio: roofs to power plants 550+ MW 2010 production 1, 500 dealer partners, #1 R&C USA >1. 5 GW solar PV deployed 5 GW power plant pipeline Residential Commercial Power Plants © 2010 Sun. Power Corporation 2

Sun. Power Technology Highest Efficiency PV § Up to 50% more energy v. standard PV § Up to 100% more energy v. thin-film PV T 0 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 © 2010 Sun. Power Corporation 3

PV vs. CSP 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 25 -30 year life with 98%+ availability Price PV was more expensive, now at parity, and trending down © 2010 Sun. Power Corporation 4

California Valley Solar Ranch www. californiavalleysolarranch. com www. sunpowercorp. com © 2010 Sun. Power Corporation 5

Project Location Sun. Power/ CVSR First Solar/ Topaz California Valley subdivision 7, 200 2. 5 acre lots Carrizo Plain National Monument © 2010 Sun. Power Corporation 6

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” © 2010 Sun. Power Corporation 7

California Valley Solar Ranch Site – 2008 Photo © 2010 Sun. Power Corporation 8

California Valley Solar Ranch – 2008 Photo © 2010 Sun. Power Corporation 9

California Valley Solar Ranch – 2008 Photo © 2010 Sun. Power Corporation 1 0

Original Design with T 20 Trackers Date: Q 1 2009 Wildlife corridors Arrays & Bldg – 1, 935 acres Design emphasis: §Maximize use of flat areas §Minimize grading §Incorporate wildlife corridors GKR impacts: Focus on flattest land §Not measured §Not known to be present at the time © 2010 Sun. Power Corporation 1 1

Redesign with T 0 Trackers – CEQA Alternative #1 Date: Q 1 2010 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 © 2010 Sun. Power Corporation 12

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

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

“M 3” – Mitigated CEQA Alternative #3 Date: Q 4 – 2010 Design emphasis: § Maximize GKR avoidance § Increase slope tolerance Core GKR area § Refine borders for efficiency § Retain full MW capacity GKR impacts: Proposed addition to project site and expanded corridor § Now only 9% of known precincts impacted © 2010 Sun. Power Corporation 15

APPENDIX / PHOTOS © 2010 Sun. Power Corporation 16

Visual Simulation (looking to Northwest) Visual Simulation of Project looking to Northwest © 2010 Sun. Power Corporation 17

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

Construction – Tracker Piers Installed © 2010 Sun. Power Corporation 19

Construction - Tracker Supports Installed © 2010 Sun. Power Corporation 20

T 0 Tracker - Architecture © 2010 Sun. Power Corporation 21

T 0 Tracker Rows – Close Up View © 2010 Sun. Power Corporation 22

T 0 Tracker – Close Up View © 2010 Sun. Power Corporation 23

Seeding After Construction © 2010 Sun. Power Corporation 24

Grazing Sheep To Manage Vegetation © 2010 Sun. Power Corporation 25