Mount Diablo Unified School District Development of a

Mount Diablo Unified School District Development of a 11. 2 MW Multi-Campus Solar Project October 26, 2010

Agenda Triple Bottom Line Benefits of Solar System Sun. Power’s Overview Capabilities v Economic Benefits v Environmental Achievements v Educational Opportunities v System Specifications v Corporate Strength v Project Team v O&M Services v Performance Guarantee 2

PG&E Source of Energy – Expensive and Volatile PG&E is largely dependent upon natural gas, an expensive and volatile source of power. California nuclear plants are being decommissioned, not replaced Map of the United States Showing Locations of Sites Undergoing Decommissioning: Source: PG&E, http: //www. pge. com/myhome/edusafety/systemwork s/electric/energymix/index. shtml Source: US Nuclear Regulatory Commission, http: //www. nrc. gov/info-finder/decommissioning/ 3

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Comparing the Solar Choice and the Non-Solar Choice Neither choice is cost or risk free (i. e. , electricity is not free) – Not doing solar means continuing to purchase ~ 21 million k. Wh ($3. 68 million) per year of electricity at unknown but likely increasing rates over the life of the system. – Doing solar would reduce PG&E usage by ~17 million k. Wh per year and would enable the District to capture ~$16 million in CSI incentive payments during the first 5 years. 5

Energy Bill Savings Sun. Power will offset 91% of the District’s PG&E bills by generating 81% of the District’s energy usage UTILITY COST OFFSET = 91% Annual PG&E Energy Bill – All 51 Schools * (Before Solar) Annual PG&E Energy Bill – All 51 Schools * (After Solar) Estimated Bill Savings from Solar Generation Percentage of PG&E Energy Bill Reduced $ 3, 681, 410 $334, 991 $3, 346, 418 91% RENEWABLE ENERGY TARGET = 81% Electric Energy Usage – All 51 Schools* 21, 305, 397 k. Wh Sun. Power Solar Generation 17, 171, 710 k. Wh Percentage of Energy from Solar 81% *Annual Current Energy Bill is based on PG&E rate tariff as of June 1 st, 2010 (Historical Energy Bill $3, 365, 134) 6

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Environmental Achievements Mt. Diablo USD environmental achievements sets the bar high for other Districts in carbon footprint reduction Equivalent savings (based solely on offset CO 2 emissions) Annual Lifetime 1, 858 55, 740 17, 709, 484 531, 284, 533 Removing cars (cars) 1, 494 44, 811 Homes Powered (homes) 1, 435 43, 055 722 21646 Planting trees (acres) Not driving (miles) Offset Home Energy Use (homes) 8

Educational Opportunities Mt. Diablo USD’s students will have access to educational opportunities on renewable energy Program Elements • Lesson Plans (“How Does Solar Work? ” and more) • Multimedia and Social Networking Tools • Teaching Videos • Real-Time Data Monitoring Activities connected with your District’s solar power systems • Classroom & Assembly Guest Speakers 9

System Overview TECHNICAL OVERVIEW Systems PROJECT ECONOMICS 11. 191 MWp of parking canopy and shade structures Total Footprint 666, 109 sq ft Energy Density 16. 8 watts/sq ft Shade Structure only (%) 19% Parking Canopies only (%) 39% Energy Cost ($/25 -year k. Wh) $60, 166, 112 $0. 1487 per k. Wh Schools "zero out bill“ or 80% load offset 46 Constrained Sites 5 42% Mix of Shade and Parking (%) System Price Module Type Sun. Power 318 MAINTENANCE – 20 -year maintenance, including cleaning and upkeep Average Performance (Yield) 1, 525 k. Wh/k. Wp – 20 -year Performance Guarantee at 95%, valued at full value of lost power (PG&E + CSI incentives) Energy Output (Year 1) 17, 171, 710 k. Wh –Systems built over 3 increments from Q 3, 2011 – Q 1, 2012 Energy Output (over 25 years) 404, 495, 967 k. Wh –Warranties: modules for 25 years; inverters for 20 years 10

Northgate High School SYSTEM SPECIFICATIONS Mounting Type PC (array 1 -8) SS (array 9) Module Type System size k. WDC System size k. WAC Energy Yield (k. Wh/k. Wp) 1 st Year Energy Production (k. Wh) Total Footprint (sq ft) Sun. Power 318 1037 917 1, 549 1, 606, 602 61, 718 PROJECT DETAILS Rate Tariff Annual Current Energy Usage (k. Wh) Annual Current Energy Bill ($)* Average Energy Value ($/k. Wh) Business As Usual E 19 S 1, 914, 387 300, 030 0. 1567 ECONOMIC BENEFITS % Energy Usage Offset % Energy Bill Offset Annual Savings ($) After Sun. Power Solution A 6 1, 606, 602 0 0. 1867 ENVIRONMENTAL BENEFITS 84% 100% 300, 030 CO 2 Emissions Savings (lb) Annual Equivalent Planting Trees (acres) Annual Equivalent Removing cars (units) 1, 686, 187 174 140 11

Northgate High School 12

Northgate High School 13

Northgate High School 14

Northgate High School 15

Glenbrook Middle School SYSTEM SPECIFICATIONS Mounting Type Module Type System size k. WDC System size k. WAC Energy Yield (k. Wh/k. Wp) SS (array 1 -3) Sun. Power 318 201 178 1, 549 1 st Year Energy Production (k. Wh) 312, 052 Total Footprint (sq ft) 11, 988 PROJECT DETAILS Business As Usual A 6 W 370, 200 68, 035 0. 1838 PG&E Rate Tariff Annual Current Energy Usage (k. Wh) Annual Current Energy Bill ($)* Energy Value ($/k. Wh) ECONOMIC BENEFITS % Energy Usage Offset % Energy Bill Offset Annual Savings ($) After Sun. Power Solution A 6 312, 052 0 0. 2180 ENVIRONMENTAL BENEFITS 84% 100% 68, 035 CO 2 Emissions Savings (lb) Equivalent Annual Planting Trees (acres) Equivalent Annual Removing cars (units) 353, 076 37 29 16

Glenbrook Rendering 17

Glenbrook Rendering 18

Project Team’s experience and knowledge ensure project success § Experience working with the MDUSD § Sun. Power’s commercial division (300 employees) based in Contra Costa County § Member of the Contra Costa Council Project Phase Design, Engineering & Permitting Installation Equipment Operations, Maintenance, Performance Monitoring Expertise Business Entity Location Design/Engineering/Permitting Sun. Power Corporation Richmond Architects/Engineering Geotechnical Engineering Construction Management Electrical PV Modules Inverters Performance Verification Monitoring, System Maintenance & Support ATI Architects and Engineers ENGEO Incorporated Sun. Power Corporation Taber Construction Inc. Del Monte Electric Sun. Power Corporation Satcon Sun. Power Corporation Danville San Ramon Richmond Concord Dublin Milpitas Fremont Richmond 19

Sun. Power Overview 5, 000 Employees Highest efficiency in the world $1. 5 B in Annual Revenue Tracker Technology Over 25 years experience Extensive Educational Experience Over 550 systems, and 450 MWp installed DSA Approval on Ground, Parking and Rooftop Systems Established and Proven. Technology Leaders. 20

Sun. Power’s O&M Experience and Capabilities Experience v Currently managing over 450 MW of solar system in 4 continents v Over 550 systems monitored v New capacity commissioned: v v v Over 120 MW in 2008 Over 100 MW in 2009 40 in house O&M team members Capabilities v Full service O&M including operations, maintenance, meter reading, and warranty administration v Most experience PV Technicians in the Business v More operational systems under management v Comprehensive monitoring and reporting capabilities 21

Sun. Power’s technology combined with best-in-class O&M services ensures the greatest return O&M Approach Scope of Services Performance Scope of Services Operation at Peak Production Performance Plus (w/ Module Cleaning) Customer Technical Support Hotline Performance Monitoring Website Sun. Power’s O&M Approach Performance Reports Daily Performance Monitoring and Notification Reliability Availability System Longevity System Uptime Monthly Preventive Maintenance & Inspections Annual System Testing Annual Performance Review Annual Corrective Maintenance Module Cleaning Annual 22

Performance Monitoring Website http: //www. sunpowermonitor. com/commercial 23

Sun. Power’s Performance Guarantee § Experience – Sun. Power has over 50 Performance Guarantees in place. – Backed by Sun. Power’s Operations Center based in Richmond, CA § MDUSD Performance Guarantee Contract: – 95% of expected output – 20 -year Term – Upside Sharing by Sun. Power: none – Accounts for value of PG&E energy rates + CSI incentives § Average reimbursement rate: ~21 cents 24