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Energy Security & Resiliency A Conceptual Plan to Provide Affordable Infrastructure Resiliency, while Ensuring Persistence of Mission Capabilities within the DOD Briefing September 12, 2014

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Intro 1 2014. Constellation Energy Resources, LLC. This presentation has been provided for informational purposes only by either Constellation NewEnergy-Gas Division, LLC or Constellation NewEnergy, Inc., affiliates of each other and subsidiaries of Exelon Corporation. Brand names and product names are trademarks or service marks of their respective holders. All rights reserved. Errors and omissions excepted.

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Exelon/Constellation Capabilities Nearly 200 years of U.S. roots Operate in 46 States More than 26,000 dedicated employees Security on our Soil Constellation is involved in every facet of the energy eco-system from generation, distribution and fuels management through supply to the end meter. A Diverse Portfolio of Expertise Built, own, and operate approximately 35,000 MW (164 MW Solar, 1,299 MW wind) History of successful project completion Operational Excellence Best in Class Standards Constructing 34 energy efficiency projects across 12 States in 2014 Financed & built over $1 Billion in energy related projects Over 4,000 energy savings projects implemented Active Project Deployment Dedicated federal development, engineering, construction, compliance, and environmental stewardship divisions within Constellation. A Dedicated Federal Team *As of 12/31/12 2 2014. Constellation Energy Resources, LLC. This presentation has been provided for informational purposes only by either Constellation NewEnergy-Gas Division, LLC or Constellation NewEnergy, Inc., affiliates of each other and subsidiaries of Exelon Corporation. Brand names and product names are trademarks or service marks of their respective holders. All rights reserved. Errors and omissions excepted.

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Macro Energy Issues Energy Price Volatility Power Reliability & Grid Pressures Cyber & Physical Security Threats Energy Security & Resiliency Emergency Preparedness Sustainability Compliance Base Optimization Distributed generation strategies mitigate risk, reduce energy price volatility, and support the achievement of strategic objectives and agency mission. 3 2014. Constellation Energy Resources, LLC. This presentation has been provided for informational purposes only by either Constellation NewEnergy-Gas Division, LLC or Constellation NewEnergy, Inc., affiliates of each other and subsidiaries of Exelon Corporation. Brand names and product names are trademarks or service marks of their respective holders. All rights reserved. Errors and omissions excepted.

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Cost Neutral Solutions that Align with Agency Mission 4 Sensors & Controllers Power distribution Chilled/Hot water distribution IT 4 2014. Constellation Energy Resources, LLC. This presentation has been provided for informational purposes only by either Constellation NewEnergy-Gas Division, LLC or Constellation NewEnergy, Inc., affiliates of each other and subsidiaries of Exelon Corporation. Brand names and product names are trademarks or service marks of their respective holders. All rights reserved. Errors and omissions excepted. Fuel Cells, etc.

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5 5 2014. Constellation Energy Resources, LLC. This presentation has been provided for informational purposes only by either Constellation NewEnergy-Gas Division, LLC or Constellation NewEnergy, Inc., affiliates of each other and subsidiaries of Exelon Corporation. Brand names and product names are trademarks or service marks of their respective holders. All rights reserved. Errors and omissions excepted.

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Delivering A Realistic Approach to Energy Security A Holistic Energy Strategy By employing a holistic approach to your energy strategy evaluating project economics in aggregate with respect to mission requirements you can achieve budget neutrality and project deployment. Traditional Power Renewable Integration Demand Side Management Energy Storage Cost Neutral Microgrid Electricity, Gas, Hydroelectricity Solar, Wind, Geothermal Load Response, Energy Efficiency Fuel Cells, Electric/Thermal Energy Storage GSA Power Contracts DLA Power Contracts UNICOR/ Federal Prison Industries 2922a EUL USACE Renewable MATOC UNICOR/ Federal Prison Industries DOE ESPC Schedule 84 2922a Area-wide Schedule 03 Schedule 84 DOE Super ESPC USACE ESPC ESPC IDIQ Basic Ordering Agreement GSA PPA DLA PPA 2922a A strategic combination of contract vehicles managed under one umbrella to achieve one unified program. 6 2014. Constellation Energy Resources, LLC. This presentation has been provided for informational purposes only by either Constellation NewEnergy-Gas Division, LLC or Constellation NewEnergy, Inc., affiliates of each other and subsidiaries of Exelon Corporation. Brand names and product names are trademarks or service marks of their respective holders. All rights reserved. Errors and omissions excepted.

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Leveraging Appropriations 7 2014. Constellation Energy Resources, LLC. This presentation has been provided for informational purposes only by either Constellation NewEnergy-Gas Division, LLC or Constellation NewEnergy, Inc., affiliates of each other and subsidiaries of Exelon Corporation. Brand names and product names are trademarks or service marks of their respective holders. All rights reserved. Errors and omissions excepted. Maximize savings by leveraging existing contracts and appropriations: Assumes Average Annual Base spending of $20M Free up capital to support mission Be good stewards of taxpayer dollars Achieve energy security Reduce carbon footprint Potential added value of employing a comprehensive energy strategy: Information supported by LBNL document 144432 AVG ENERGY BUDGET AVG ENERGY EFFICIENCY PROJECT SAVINGS AVG TERM OF AN ENERGY EFFICIENCY CONTRACT TOTAL POTENTIAL SAVINGS OVER THE 15 YEARS X X = AVG ENERGY BUDGET AVG ENERGY EFFICIENCY PROJECT SAVINGS AVG AVERAGE TERM OF AN ENERGY EFFICIENCY CONTRACT TOTAL POTENTIAL SAVINGS OVER THE 15 YEARS $20M X 20% X 15yrs LONG TERM ENERGY AS A SERVICE $70M Cost Neutral Solutions that Align with Agency Mission $20M 20% 15yrs $60M + = Scenario 1 Scenario 2

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Thank you. John Dukes Executive Director, Federal 100 Constellation Way, Suite 1200C Baltimore, MD 21202 410-470-3744 John.Dukes@constellation.com