1. Solar-to-EV Project at the San Diego Zoo Western Underground Conference April 10, 2013 © 2013 San Diego Gas & Electric Company. All copyright and trademark rights reserved.

2. Sustainable Communities Program Goal: Work with our customers to showcase energy efficient, sustainable projects that incorporate SDG&E-owned clean generation systems Integrate photovoltaics, plug-in electric vehicle (PEV) chargers and energy storage with advanced communications & control systems in support of SDG&E’s Smart Grid Deployment Plan Systems – photovoltaics, fuel cells & energy storage Owned, maintained & operated by SDG&E Typically interconnected on utility side of the meter No effect on customer utility bill SCP now has 36 projects for a total of nearly 4.4 MW Includes a 400 kW fuel cell Awarded the US Green Building Council Leadership Award

3. Sustainable Communities Program This is an innovative distributed-generation program in answer to adding more renewable energy to our grid Potential Benefits to customer: Collaborate with SDG&E on a Smart Grid project Energy Dashboard Education for occupants and visitors Community partner to help provide locally generated clean power Public Recognition – Sustainable Communities Champion Award, website, advertisement recognition & case studies Possible LEED ® points or payment for space occupied by photovoltaics system Potential Benefits to utility: Clean, renewable distributed generation on the grid New advanced energy storage projects will: Reduce intermittency from PV Offset PEV charging Peak shave utility peak load Showcases SDG&E’s environmental stewardship

4. Steps in the process Contract terms: 20 year lease with options at years 10 and 15 to renew, purchase the energy system or request removal of the system Lease payment (if applicable) is paid annually, but the first five years are paid upfront – Lease payment is $0.01/kWh per year, calculated up front based on nameplate of PV – e.g. 100 kW PV – annual lease payment of $1,700 PV/Clean Energy Installation: 1. SDG&E issues a RFP to approved solar vendors 2. SDG&E awards the bid 3. Solar vendor designs the PV/Clean Energy system 4. Solar vendor obtains permits 5. Work with construction schedule to install the system 6. Commission the system

5. SCP Installations to date: 36 Projects for a total of 4,380 kW They collectively generate enough energy at peak production to supply 2,855 homes. The energy produced prevents more than 8.9 million pounds of CO 2 equivalent from entering the atmosphere each year. The GHG savings from the electricity produced is equivalent to not driving a car 11.6 million miles, or planting over 133,000 trees.

6. Solar-to-EV Project at the San Diego Zoo Project Summary A solar photovoltaics system harnesses energy from the sun to charge cars, store solar power for future use and provide renewable energy to the community – 10 solar canopies of 9 kW for a total of 90 kW – 5 Plug-In Electric Vehicle charging stations (includes an ADA accessible charging station) installed and owned by a third party – Advanced energy storage using Li-Ion batteries – 100 kW/100 kWh Reduce intermittency from PV Offset PEV charging Peak shave utility peak load

7. Solar-to-EV Project at the San Diego Zoo The Solar-to-EV project is a collaboration between the San Diego Zoo and Smart City San Diego Smart City San Diego combines the resources of SDG&E, City of San Diego, University of California San Diego, General Electric and CleanTECH San Diego to improve the region’s energy independence, reduce greenhouse gas emissions and assert San Diego as a clean energy leader. This Solar-to-EV project will serve as a new energy infrastructure blueprint that can be replicated in the San Diego region and beyond.

8. San Diego Zoo Plug-In Electric Vehicle Chargers

9. San Diego Zoo Wide Angle View

10. San Diego Zoo Aerial View

11. San Diego Zoo Energy Storage Schematic 11 KEY:# Energy Flows 1 PV to Power Converter 2 Bi-directional Converter to Battery 3 Power Converter to EV 4 Bi-directional inverter to grid 1 2 3 4 PV Array Multi-Port Converter/Inverter AC Battery PV Port ES Port ES Port Grid EV Port Port Grid GRID Meter DC Power Converter Power Converter

12. San Diego Zoo Energy Dashboard Education

13. San Diego Zoo Energy Dashboard Green Features

14. San Diego Zoo Energy Dashboard SDG&E’s Environmental Stewardship

15. Case Study - Energy Innovation Center Roof Top Solar: 47 kW SDG&E-owned system Six Solar Trees ® create a Solar Grove ® : 62 kW SDG&E-owned system Newly developed solar tracking technology will increase energy production ~20% compared to stationary systems Integrated with advanced energy storage Plug-in electric vehicle (PEV) chargers ©Envision Solar International, Inc. Ted Walton Photography

16. Case Study - Energy Innovation Center Education dashboard showcasing the rooftop vs. the solar grove production ©Envision Solar International, Inc. Ted Walton Photography

17. Newest Projects Click to add text – Next level text here UC San Diego Structural Materials Engineering Bldg. 120 kW photovoltaic system – Seeking LEED® Gold UC San Diego Charles David Keeling Apts. 41 kW photovoltaic system – LEED Platinum Sharp Rees-Stealy Medical Center Downtown 120 kW photovoltaic system – Seeking LEED Gold

18. 18 connected…..to the sun Two pilot programs: Share the Sun and SunRate Programs to add 20+ MW of local solar Pending Commission Approval Integrating Renewable Energy into the Distribution System Sustainable Communities Program Integrates utility owned clean generation and smart grid technologies within sustainable projects Participants “host” generation systems by leasing space to SDG&E

19. connected to the sun 2/3 of customers can’t take advantage of rooftop solar Expands solar to all customers -- opens new market for solar developers Application filed to implement two pilot program elements: Share the Sun -- enables customers to invest in solar systems from a solar provider SunRate -- allows customers to purchase green energy from local solar projects under contract to SDG&E Connecting Customers to Solar Energy Share the Sun For solar providers & customers For customers SunRate

20. connected to the sun Potential Benefits Expands local solar access and greater alternatives to customers – Removes site restrictions and building ownership as a hurdle to solar energy use – Customers can lock-in their commodity price with a longer- term commitment – Customers can take their solar subscription with them when moving – Provides access to solar projects that have the benefits of optimal location, scope and scale Creates a sustainable market and new business opportunities for solar in SDG&E territory that does not rely on cross subsidies 20

21. Sustainable Communities Program Questions?