Behind the Meter Battery Energy Storage System M&V Study Study Results Report with Addendum 1 AUGUST 1, 2019 Prepared for: San Diego Gas & Electric Company Emerging Technology Program Kate Zeng Christopher M. Roman 8306 Century Park Court San Diego, CA 92123 Prepared by: Information & Energy Services, Inc. Michael Rogers, PE, CEM James Bottomley, EIT 16770 Santanella Street San Diego, CA 92127 Table of Contents 1.0 Executive Summary ............................................................................................ 5 1.1 Synopsis ....................................................................................................................................................................... 5 1.2 Project Background ................................................................................................................................................ 5 1.3 Results .......................................................................................................................................................................... 6 1.3.1 Peak-Shaving Strategy .................................................................................................................................................... 6 1.3.2 Demand Response .............................................................................................................................................................. 7 2.0 Technology Overview ....................................................................................... 12 2.1 Energy Storage Systems ...................................................................................................................................... 12 2.2 SGIP Requirements ............................................................................................................................................... 15 2.3 30 kW / 60 kWh System ..................................................................................................................................... 16 2.4 250 kW / 500 kWh System ................................................................................................................................ 17 2.5 Description of Incumbent Technology .......................................................................................................... 19 3.0 Evaluation Methodology .................................................................................. 20 3.1 Study Goals ............................................................................................................................................................... 20 3.2 Measurement & Verification Overview ........................................................................................................ 21 3.3 Metering Plan .......................................................................................................................................................... 23 3.4 Metering Verification Plan ................................................................................................................................. 24 3.5 DR Event Simulation Methodology................................................................................................................. 26 3.5.1 Scope of Testing ............................................................................................................................................................... 26 3.5.2 Notifications ...................................................................................................................................................................... 26 3.5.3 Vendor Availability Forecasting............................................................................................................................... 27 3.5.4 DR Baselines and Curtailment Analysis ................................................................................................................ 27 4.0 Findings ........................................................................................................... 29 4.1 Effects on Utility Demand Baseline ................................................................................................................ 29 4.2 Demand Response Effects .................................................................................................................................. 37 4.3 ESS Round-Trip Efficiency Analysis ............................................................................................................... 42 4.4 Discharge Cycle Analysis .................................................................................................................................... 43 4.5 Financial Analysis .................................................................................................................................................. 45 4.6 Critical Peak Pricing Program (CPP-D) and Capacity Bidding Program (CBP) Discussion ..... 45 4.7 Technical Incentive (TI) Program Analysis ................................................................................................ 47 4.8 Market Analysis ...................................................................................................................................................... 47 5.0 Conclusion ....................................................................................................... 50 Works Cited.............................................................................................................. 51 Addendum 1............................................................................................................. A1 Addendum 1 Synopsis ........................................................................................................................................................ A1 Project Background (Addendum 1) .............................................................................................................................. A1 Addendum 1 Results ........................................................................................................................................................... A2 Peak-Shaving Strategy............................................................................................................................................................. A2 Battery Energy Storage System M&V Study 2 Demand Response ...................................................................................................................................................................... A3 Addendum 1 Conclusion .................................................................................................................................................... A7 Addendum Appendix 1A .................................................................................................................................................... A8 Grossmont High School ............................................................................................................................................................ A8 West Hills High School aka Health Occupation Center............................................................................................. A9 Monte Vista High School ...................................................................................................................................................... A10 El Cajon Valley High School ................................................................................................................................................ A11 Addendum Appendix 1B .................................................................................................................................................. A12 Grossmont High School ......................................................................................................................................................... A13 West Hills High School aka Health Occupation Center.......................................................................................... A15 Monte Vista High School #1 ............................................................................................................................................... A15 Monte Vista High School #2 ............................................................................................................................................... A18 El Cajon Valley High School #1 ......................................................................................................................................... A20 El Cajon Valley High School #2 ......................................................................................................................................... A22 El Cajon Valley High School #3 ......................................................................................................................................... A24 Appendix A ............................................................................................................. A25 Grossmont Union High School District ...................................................................................................................... A26 East County Regional Education Center ....................................................................................................................... A26 El Capitan High School ........................................................................................................................................................