Ne New w Paradigm. Ne New Partners. Ne New w Ener nergy gy. - PowerPoint PPT Presentation

Ne New w Paradigm. Ne New Partners. Ne New w Ener nergy gy. . Inves esto tor Presen entat atio ion June 2011 June 2011

Lime’s Mission T o be be th the e lea eade der r in de devel eloping ing an and d impl plementi nting ng econom omicall ically y viabl ble clean n energy gy solu lution tions that be benefi fit our communi nities ties and d pr protect t our en envir ironm onment ent .

NASDAQ: LIME Lime Energy has been delivering clean energy solutions for over 30 years. Our business focuses on three important areas for clean energy: • Energy Efficiency to reduce consumption • Renewable Energy for cleaner ways of producing the energy we need • Smart Grid solutions to optimize the efficiency of our energy infrastructure 400 Employees • 2B+ of Square Feet in Efficiency Projects • Our clients include: • Leading Fortune 500 Businesses  Major Investor-Owned Utilities  Global Energy Service Companies (“ESCOs ")  Federal, State and Municipal Government Agencies 

LIME’S NATIONAL FOOTPRINT & CONTRACT AWARDS Bellevue, WA Boston, MA Lee, MA Buffalo, NY Emeryville, CA New York, NY Philadelphia, PA San Jose, CA Bethlehem, PA Elk Grove Woodbridge, NJ Northridge, CA Village, IL Denver, CO Greensboro, NC Glendora, CA Charlotte, NC San Diego, CA Austin, TX Atlanta, GA Aiea, HI Dallas, TX Lime New Lime Contracts (Last 18 Months) Locations

GLOBAL AWARENESS & MARKET TRANSITION “Clean energy remains one of the strongest and most vital sectors reshaping the global landscape” – Clean Edge: 2011CleadTech Trends Projected increase in the annual Energy Efficiency market by nearly $400 billion by 2030. ACEEE, The Size of the U.S. Energy Efficiency Market 2008 Global Investments in Renewable Energy are Expected to reach $896 billion by 2020 – Research & Markets, April 18 th 2011 The investment needed to implement a fully functional US Smart Grid ranges from $338 billion to $476 billion and can result in benefits between $1.3 trillion and $2 trillion. - EPRI 2011, Estimating the Costs & Benefits of the SmartGrid

LIME’S ALIGNMENT & ENERGY MARKET TRANSITION 25 Year History Clean Energy Integrators Policy Energy Renewable Smart Efficiency Energy Grid Opportunity Smart Grid New Energy

LIME OPTIMIZED Lime is aligned & optimized to deliver on the promises of New Energy: New Energy Opportunity Clean Tech SMART SMART SMART COMMUNITIES GRID BUILDINGS

ORGANIZATIONAL DELIVERY STRUCTURE Regional Energy Asset Key Client Operations Development Relationships • • • Diverse capabilities Asset Development Major Utility Companies • • • Local presence Deal Structuring Fortune 500 Companies • • • Local government & Renewable Energy expertise Energy Service Companies • institutional clients Government Agencies Organization Optimized to Deliver: • • • Regional market Optionality Sales Excellence • • expertise Overcoming project Large Contracts • • Cost-effective Delivery development barriers Partner Ecosystem • Custom Program Delivery

LIME’S SOLUTIONS Lime Energy meets our clients’ needs with a comprehensive suite of services across the full range of energy efficiency and renewable energy projects in their facilities: Lime combines multiple energy savings measures with viable energy programs to deliver real business value.

CUSTOMER/MARKET DRIVERS Investor-Owned Public Sector / Private Sector/ Utilities Institutional National Accounts Adhering to increasing Complying w/ executive Realizing near term return on federal, state and local orders for energy & green investments and reducing government regulations house gas emission reduction ongoing operating cost    Increasing pressure for Complying with Energy Implementing budget sustainability and corporate Efficiency Resource neutral infrastructure social responsibility Standard (EERS) upgrades    Securing Energy Intelligence to Optimizing Smart Grid for Reducing annual energy costs drive smarter energy decisions secure and efficient while securing future energy across global business units. electrical distribution price stability

LIME’S PROVEN DELIVERY Lime’s ethics & culture to Ability to out innovate our We consistently deliver always do what is right competition with complete on our promises & for the customer. solutions. programs. One Company Approach Quickly react & adjust Ability to provide scale local policy & strategy, to state by state policy to programs, geography energy audits, design & changes and solutions. implementation.

LIME’S INVESTMENTS 2011 Scalable Platform Lime’s platform creates business value by delivering expertise, 2010 Delivery Process speed, innovation through proven methodologies, policy enablement, and scalable Segment Focus 2009 solutions. 2008 Acquisitions • Execute on Larger Projects • Leverage Key Partnerships • Recruit Top Talent

LIME’S PLATFORM l PEOPLE 400 Employees “We are the Proven Culture Implementers!” Fulfillment Teams Sales People Excellence Innovation

LIME’S PLATFORM l POLICY Sales & Operational Alignment 23 Strategic U.S. Offices Policy RPS Standards Incentive Both EERS & RPP Standards Programs Lime’s Active Programs Go-To- & Investments Market Strategies

LIME’S PLATFORM l POLICY 2000 = 2 2006 = 9 2008 = 18 / 1 pending 2004 = 4 Today 2011 = 40 / 4 w/Goals Policy Lime has helped save National Grid customers 55 million kWh and $6.7 million annually on their electric bills. Customers have benefited from $12.5 million in National Grid Incentive monies.

LIME’S PLATFORM l PARTNERS Global ESCOs "Our alliance with a design and implementation firm such as Lime Energy bolsters the consulting we're doing Technology through GE's engineering and specification teams," Providers Lou Mane Managing Director | GE Energy Services Program Partners “Lime has been one of the leading State companies in delivering customers into Program this program. Managers They have demonstrated a consistent commitment to the Program and have built a professional team, which has been a valuable resource to TRC in its implementation of this Program.” Niche Investor-Owned Contractors Francis X. Reilly, Jr., Utilities Senior Vice President, TRC Energy Services New Jersey’s Clean Energy Programs

LIME’S PLATFORM l LIME iPLAN Building EE Assessments Universal & Lime Consistent standards iPlan Web based platform for customer facility energy asset inventory Utility Bill & Utility Digital time stamped Weather Data inventory ID for Programs baseline verification Demand Response Load Pocket Management KwH Reduction & Acquisition

| Financial Summary

REVENUE GROWTH Quarterly Revenue Annual Revenue ($ in millions) $45.0 $40.0 ($ in millions) $35.0 $140.0 $30.0 $120.0 $100.0 $25.0 104.3% CAGR $80.0 $20.0 $60.0 $15.0 $40.0 $10.0 $20.0 $5.0 $0.0 $0.0 2006 2007 2008 2009 2010 2011 E Q1 Q2 Q3 Q4 2006 2007 2008 2009 2010 2011

SELLING, GENERAL & ADMIN. EXPENSE $ millions $30 29.9% CAGR $25 $20 $15 $10 $5 $0 2006 2007 2008 2009 2010

OPERATING LEVERAGE 20 18 16 14 Revenue Growth 104.3 CAGR 12 Revenue Growing 10 Approximately 3 times as fast as SG&A Expense 8 SG&A Expense Growth 29.9% CAGR 6 4 2 0 2006 2007 2008 2009 2010

OPERATING LEVERAGE 2010 Growth 40.0% 35.0% 30.0% 25.0% 20.0% 15.0% 10.0% 5.0% 0.0% Revenue SG&A

OPERATING LEVERAGE SG&A as % of Revenue 180% 160% 140% 120% 100% 80% 60% 40% 20% 0% 2006 2007 2008 2009 2010

OPERATING LEVERAGE Gross Margin 25.0% 20.0% 15.0% 10.0% 5.0% 0.0% 2006 2007 2008 2009 2010

OPERATING LEVERAGE Cost as % of Revenue 300% 250% 200% 150% 100% 50% 0% 2006 2007 2008 2009 2010 COGS SG&A Amortization Impairment

OPERATING LEVERAGE Adjusted EBITDA $2.0 $0.0 -$2.0 -$4.0 -$6.0 -$8.0 -$10.0 2006 2007 2008 2009 2010 2011 E

RECENT COMPANY STATISTICS 2010 Revenue Year End 12/31: $95.7 M • Shares outstanding: 23.8 M • Market Cap as of 05/03/11: $113 M • Cash as of 03/31/11: $9.0 M • Long Term Debt as of 03/31/11: $495 K • Insider Ownership (Approx): 48% • Institutional Ownership (Approx): 12% • 52 Week High/Low: $5.50 / $2.77 •

SUMMARY Lime Energy is well-positioned for this current market transition. Our people are proven and continue to deliver on the promises to our valued customers. Game-changing partnerships are quickly emerging and seeking established players. Lime’s platform investments allow for speed, scale and innovation.