1. Presented by: Presented for: ESS Performance Testing US DOE Energy Storage Smart Grid Demonstration Peter Blume April 26, 2016 Energy Storage Association (ESA) Conference

2. Copyright © 2016 Bloomy Controls. All rights reserved. DOE ENERGY STORAGE SMART GRID DEMONSTRATION Award Number: DE-OE0000229  DTE Energy, S&C Electric, Kokam, eCamion, DNV GL 1 MW of distributed Li-ion energy storage  18 25 kW/50 kWh CES Units  2 25kW/48 kWh, 96 kWh new and repurposed xEV batteries  1 500 kW battery with 500kW solar system Applications  Islanding during outages  Peak shaving, demand charge reduction  PV Integration: smoothing and time shift  Frequency regulation  Renewable energy time shift  Renewable generation smoothing  Selling power back to grid Community Energy Storage (CES)

3. Copyright © 2016 Bloomy Controls. All rights reserved. MISSION Encourage innovation and development of critical energy storage technology in order to improve reliability and resiliency in electrical grid and transportation applications. ESS PERFORMANCE TESTING An independent test lab operated by DNV GL in Rochester, New York. BEST Test and Commercialization Center

4. Copyright © 2016 Bloomy Controls. All rights reserved. ESS PERFORMANCE TEST SYSTEM High-Voltage Acquisition Unit High-Channel Acquisition Unit Controller Unit

5. Copyright © 2016 Bloomy Controls. All rights reserved. TEST CONFIGURATION 2012, 2015: 25kW/50kWh CES, 2015: 25kW/96kWh CES

6. Copyright © 2016 Bloomy Controls. All rights reserved.

7. TEST RESULTS Functional test of first production CES (2012)  Verified basic operation, AC and DC round-trip efficiency, frequency regulation, peak shaving, islanding, harmonics, basic impulse level  Normal local operation, remote monitoring and control, abnormal operation, safety-related fault conditions were tested and verified Aged battery analysis (2015)  Initial capacity check, cycling test, peak shaving profile, final capacity check  53kWh capacity was verified with > 95% DC and 87% AC efficiency  Peak shaving discharge power maintained without reaching 0% SOC  No faults, no observed signs of aging or degradation Repurposed EV batteries (2015)  Initial capacity check, AC round-trip efficiency, peak shaving profile, final capacity check  Average discharge energy of 92kWh beginning of life battery reduced to 52kWh

8. Copyright © 2016 Bloomy Controls. All rights reserved. Peter Blume peter.blume@bloomy.com 860.607.2045 Steven Hoenig Steven.hoenig@bloomy.com 201.448.8981 QUESTIONS? Contact Us Haukur Asgeirsson asgeirssonh@dteenergy.com 313.235.9370