G eneration

1. Eos Energy StorageCREA Energy Innovations Summit | Denver, COPhilippe Bouchard, VP of Business Development

2. Today’s Electricity Grid is Massively Overbuilt & Under Utilized… Transmission Generation Distribution Ratepayers fund hundreds of $Bs of infrastructure to serve peak demand Sources: “Electric Power System Asset Optimization.” NETL, March 2011; “The Power of Five Percent.” The Brattle Group, May 2007

3. Regional Spending on T&D Projects Completed by 2020 Heavily Weighted Towards the Rockies ~66% of projected infrastructure spend through 2030 is distribution system upgrades Sources: “Electric Power System Asset Optimization.” NETL, March 2011; “The Power of Five Percent.” The Brattle Group, May 2007

4. Significant growth in energy storage industryhas already begun 2013 RFPs outstrip previously installed capacity Energy storage market to reach ~$25B by 2022 2013 energy storage announced RFPs exceed total current global installed non-hydro storage capacity (MW) Battery Energy storage market projection (GW) ($B) 2013 represents a~$4B market confidential Source: IHS “The Grid connected energy storage market” 2014 DOE Storage Database; Press searches

5. Eos Aurora Designed Specifically to Meet Market Requirements for Grid-Scale Storage Eos Aurora 1000|4000 Grid-Scale Energy Storage v v Eos ZnythTMSub-Module Eos Aurora optimized to meet customer requirements and to provide lowest LCOE

6. Levelized cost of energy is critical metric for adoption; Eos LCOE lower than incumbents and competitors EOS Eos outcompetes gas peaking turbines on an LCOE basis

7. Optimize Demonstrate Deploy Eos Partnering with Major Utilities on Business Case Driven Product Development & Demonstration • Eos Genesis collaboration includes: • Detailed business case analysis to identify profitable opportunities for deployment • Testing and evaluationof Eos’ novel ZnythTM battery technology leveraging partner facilities and testing platforms • Pilot demonstration of Eos Aurora systems to understand real-world costs and to optimize value streams  Countries GW Generation • Together Eos’ Genesis Partners represent: Customers Miles of T&D 7

8. Powerful Business Cases for Storage Behind-the-meter Storage MW-Scale Grid-Connected 1 2 • Time of Use (TOU) energy management • Demand charge reduction • $2.1/W locational capacity program • Permanent Demand Reduction • Demand response program participation • Electricity peak shifting (arbitrage) • Generation capacity • Transmission or distribution deferral • Ancillary services • Renewables integration premiums

9. Example: Grid-Connected ‘Triple Play’ Financing assumptions: 75% debt @ 8.0%, 10 yr All Equity Leverage • Eos installation creates 56% IRR and 2-year payback

10. Example: 50MVA Substation Deferral • Energy storage can be used on a targeted basis to provide locational capacity and to defer costly T&D upgrades, improving reliability and lowering costs for the utility / ratepayer • T&D upgrade performed as usual; upfront Y1 spend • Storage installed Y1utility-owned, 5-year T&D deferral • Storage installed Y1, 10-year contract (developer monetizes market revenues) + $10.3M addition to rate base NPV: ($10.5M) + $16.1M addition to rate base NPV: ($10.5M) +$10.3M addition to rate base in Y5 NPV: ($6.9M) A B C

11. Example Peak Load Shaving Battery / Load Profile

12. Example: Behind-the-Meter ‘Triple Play’ All Equity Leverage 100 kW Project Concept Design Eos low-cost, energy dense, and safe battery flattens customer load while increasing resilience Images and financial projections provided courtesy of Convergent Energy + Power

13. Behind-the-Meter Business CaseJuly 2010 Demand Charge Reduction 2 Hour “Demand Response” Call Balance charge / discharge profile to reduce the monthly peak without creating a new one

14. What We’re Hearing from the Solar Industry First Solar CEO, Jim Hughes: * Market cannot respond to falling solar prices because of structural limits: • Transmission capacity constraints • Grid stability issues • Load shape and growth • Utility resource planning cycles * The key to long term growth is to solve for these constraints. * Price alone won’t do it… Critical question: What is the sustainable business model and where does storage fit in? cleantechsummit.com 1) Jim Hughes, First Solar. Tomorrow’s Utility: The View from the Sun. CleanTech Investor Summit. Feb 2013. http://cleantechsummit.com/resources-2/

15. Eoscontinues to make strong progress and will deliver first systems to Genesis partners in Q4 2014 2015… Q2 2013 Q3 2013 Q4 2013 Q1 2014 Q2 2014 Q3 2014 Q4 2014 AC-Integrated SystemQ4 2013 Planned Pilot Projects Con Ed Q4 2014 2kW Modules Internal Testing Feb 2013 GDF Suez Q4 2014 Manufacturable Sub-Module Design Q3 2013 Commence MW Genesis Production 3rd Party Testing & Validation Q2 2014 2014 Focus: Demonstrate kW-scale, test and optimize AC-integrated systems with Genesis partners, ramp up manufacturing 15

16. Eos to Announce 2016 Commercial Product Offering and Aegis Program • COMMERCIAL PRODUCT • Firm delivery of 1MW/4MWh systems available at $300/kWh for 2016 install and $160/kWh for 2017 install • 1 year standard warranty; up to 5 yr warranty at additional cost • AEGIS PROGRAM • Establishes formal relationships with system integrators to provide AC-integrated, turn-key systems via multiple distribution channels • Aegis partners can provide warranty wrap and option for extended performance guarantee • Aegis partners to be announced in near future Aurora 1000 | 4000 (DC battery system) 2015 demonstration partners will have priority access to 2016 volume In December, Eos plans to announce availability of its 2016 & 2017 commercial product (DC battery), also offered with full AC integration via Eos’ new Aegis Program

17. www.eosenergystorage.com