Storage ArraysLow Cost, Reliable Resource Adequacy

September 2013 - IEP

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24 MW Los Andes2009

64 MW Laurel Mtn.2011

174 MW and growing…A fleet of cost competitive, reliable storage resources

40 MW Angamos2012

40 MW Cochrane2014 Online Date

40 MW TaitSep 2013

AES Carina @ IPLWorld’s first grid

Lithium-ion batteryFeb 2008

Customers:

4MWCarina

IndianaTechnical Validation

2008

24 MWLos Andes

24 MW, ChileSpinning Reserve (CDEC-SING)

2009

Angamos 40MW Battery Resource in Chile

“By crafting and completing such an innovative power plant that maintains a high level of environmental performance, AES has continued its dedication to excellence in service and performance.” Thomas R. Kuhn, EEI President

© 2013 The AES Corporation All Rights Reserved

Angamos 40MW resource quick, precise response to event on 4/9/12 to maintain grid

Source: CDEC-SING, AES

Angamos BESS Response Angamos BESS responds with

rapid increase of output from 0MW to 20MW

Autonomous response according to programmed profile

Output sustained until stability restored

Thermal unit responds with 4MW burst, then output drops off

Gradually ramps up in oscillating manner to 7MW output increase over 4 minutes

Thermal Units

© 2013 The AES Corporation All Rights Reserved

7

64 MW Laurel Mountain Battery Resource in West Virginia, USA

64 MW Laurel Mountain battery resource operating commercially in PJM since 2011.

• Operating range of +32MW to -32MW• Precise response to 4 second AGC• Ramp rate mitigation• Economic, daily bid in PJM power market

© 2013 The AES Corporation All Rights Reserved

Battery arrays are a dual resource generation + controllable load – with no minimum generation.

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Battery Arrays have a superior architecture for reliability than large unit power plant resources.

100MW unit with one module unavailable Source: Navigant, AES,

Battery Arrays Traditional Power Plants

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97% EAF97% EAF

40 MWTait

40 MW, U.S.Regulation (PJM-Ohio)

2013