Advanced Energy Storage for the Grid

GSS™

Grid Storage Solution

VERSATILE. FLEXIBLE. PROVEN.

POWER: Superior power by weight or volume in a cost effective solution

SAFETY:Nanophosphate® is stable chemically, providing the foundation for safe systems

LIFE: Excellent calendar and cycle life with consistent performance over extended use

ENERGY: Higher usable energy means greater battery utilization and lower cost

The Nanophosphate® AdvantageToday, NEC Energy Solutions is proud to feature industry leading Nanophosphate® lithium ion battery technology. A123 Systems Nanophosphate delivers high power and energy density combined with excellent safety, performance and cycle life.

POWER SAFETY LIFE ENERGY

The Nanophosphate® AdvantagePOWER SAFETY LIFE ENERGY

The Nanophosphate® Advantage

POWER SAFETY LIFE ENERGY

The Nanophosphate® AdvantagePOWER SAFETY LIFE ENERGY

The Nanophosphate® Advantage

Learn more at www.neces.com

Advanced energy storage technology is integral to increasing the efficiency of power grids worldwide and enabling them to become smarter, cleaner and more reliable. By efficiently decoupling generation from demand, NEC’s highly versatile megawatt scale Grid Storage Solution (GSS™) helps traditional and renewable power plant, transmission and distribution asset owners meet these needs today. The GSS™ serves to smooth output and improve quality from renewable power facilities, lower emissions, maintenance and capital costs of traditional power plants and increase T&D utilization factors and effective capacity.

GSS™ Key Benefits:NEC’s GSS™ facilitates multiple efficiency gains on the power grid providing a safe, reliable and fully-integrated system that enables customers to:

INCREASE SYSTEM EFFICIENCY

�� Decouple generation and load

�� Operate thermal assets at optimal output

�� Reduce emissions

�� Increase asset efficiency and utilization

�� Reduce operating and maintenance costs

�� Release “reserve capacity” into revenue generating service

�� Ease transmission constraints

IMPROVE GRID STABILITY AND RELIABILITY

�� Provide ancillary services

�� Improve frequency regulation and balance load at a lower cost

�� Provide new capacity that can be deployed quickly

�� Provide dependable frequency response

ENABLE INTEGRATION OF RENEWABLE SOURCES

�� Mitigate intermittency, “firming” of renewables

�� Provide greater ramp rate control

�� Supports Renewable Portfolio Standards (RPS) targets

INCREASE ENERGY SECURITY

�� Support utilization of diverse domestic energy supply, including renewable sources

VERSATILE.

Grid Storage Solution™ Applications:NEC’s GSS™ technology is highly versatile and provides a solution for multiple applications across power generation, transmission and distribution to increase efficiencies, improve power quality and support greater asset utilization.

GENERATION

�� Frequency Regulation

�� Renewable Integration

�� Spinning Reserve

�� Power Plant Hybridization

�� Ramp Rate Management

TRANSMISSION

�� Voltage Support

�� Dynamic Line Rating Support

�� Renewable Integration

�� Dynamic Stability Support

�� Loss Reduction

�� Constraint Relief

DISTRIBUTION

�� Residential and Industrial Backup Power

�� Microgrid and Island Grid Support

�� Distribution Upgrade Support

�� Peak Load Reduction

NEC’s GSS™ is a flexible and fully integrated turnkey solution with a grid-ready design that can be rapidly deployed today to enable generators, utilities and both traditional and micro grid operators reduce costs and increase plant efficiency. With High-Rate (HR) and Long-Duration (LD) options ranging from kilowatt-scale to hundreds or more megawatts, NEC’s GSS™ can be easily configured to meet customers’ exact power and energy requirements. The modular design of the GSS™ system is highly portable, easy to site and permit and can be configured to fit in spaces that cannot accommodate traditional generation assets.

GSS™ Architecture

NEC’s GSS™ offers a flexible, modular architecture that consists of three key components: the Grid Battery System (GBS™), AEROS™ Energy Control System and Power Conversion System, which are fully integrated and grid-ready. The GSS™ delivers a system-level AC-AC roundtrip efficiency rating of 90 percent*.

*90% efficiency rating at system level, based on AC-DC-AC conversion, including battery management system electronics, excluding auxiliary power.

GSS™

Custom Large-scale GBS™

20', 40' and 53' Containerized GBS™

Long-Duration [LD] Energy Storage RackHigh energy battery optimized for longer runtimes, upwards of 4 hours

High-Rate [HR] Energy Storage RackHigh power battery capable of full discharge in as little as 15 minutes

GBS™ Zone Subsystem

STANDARD SOLUTIONS

CUSTOM SOLUTIONS

Power Conversion System AEROS™ Energy Control System Grid Battery System (GBS™)

FLEXIBLE.

GBS™

NEC Energy Solutions’ Grid Battery System (GBS™) is based on modular rack-integrated energy storage racks, which serve as the building blocks for easily configurable HR and LD energy storage systems that meet application-specific requirements. The standard containerized GBS™ product portfolio includes the 20’, 40’ and 53’ LD systems and the 53’ HR system. Fully functional, free standing GBS™ Zone Subsystems are made up of energy storage, controls, and protection equipment, and can be housed in buildings or custom sized enclosures. All GBS™ units come as part of a GSS™ solution including zone level touch screen control interfaces, and an integrated fire prevention, detection and suppression system.

AEROS™ Energy Control SystemAEROS™, NEC’s advanced energy response operating system platform, delivers full industry leading command and control functionality for seamless integration with utility systems. Features of AEROS™ include:

� Automated command and control via industry-standard secure protocols

� Manual control remotely via secure Web-based user interface

� Multi-user access with customizable access rights

� Real-time reporting of system capabilities and performance

� Multiple applications available including frequency regulation, frequency response, renewables (wind and solar) ramp management, load leveling, volt/VAR support, and more

� Optional fast-response droop support for voltage and frequency

� Dynamic mode selection based upon customer-defined rules

� 250 millisecond standard response time, <30 millisecond high speed option available

� Communications protocol support including DNP3.0, IEC61850, Modbus TCP, SNMP, and IEEE C37.118

� Clustered configurations available for high-availability on all GBS™ units

� Remote monitoring, data collection and data historian options with GPS-time synchronized timestamping

� Integration with optional IP video surveillance system

� High- and low- frequency ride through

� Optional redundant control architecture for enhanced failover protection

Power Conversion SystemNEC Energy Solutions’ GSS™ features integrated high–efficiency bidirectional power converters that inject and absorb real and reactive power between the GBS™ and grid. Features include:

� Fully containerized modular solution with various enclosure options

� Four-quadrant capable

� IEEE 1547 compliant, IEEE 519 compliant options

� High- and low-voltage and frequency ridethrough

� 50Hz or 60Hz connection frequency options

� Optional step up transformer to MV AC output

� 480VAC output (typical)

With more than 110 megawatts shipped to date, NEC Energy Solutions is the world’s leading supplier of advanced battery systems for grid energy storage. Our global utility and independent power producer customers include AES Energy Storage, Sempra Generation, Southern California Edison, Dongfang Electric Machinery Corp., Vestas, Maui Electric Company, Red Eléctrica de España, IHI Corporation, Enel Distribuzione and Northern Powergrid, among others. These and other customers are deploying NEC’s GSS™ for a number of applications, including frequency regulation, spinning reserve, renewable integration and T&D reinforcement and support.

Learn more at www.neces.com

PROVEN.

FLE

XIB

LE.

* Inclusive of battery management electronics; excluding auxiliary power consumption by thermal management systems. Long-Duration GBS™ efficiency measured at full depth of discharge. High-Rate GBS™ efficiency measured at partial depth of discharge near mid state-of-charge.

** Models shown represent the maximum number of racks per container. Rack count may be reduced to modify capacity and power.

NEC Energy Solutions, Inc.makes no warranty explicit or implied with this exhibit. Contents subject to change without notice.

VERSATILE.

PROVEN.

Credit AES

Credit AES

Grid Battery System (GBS™) Standard Containerized Unit Details

Long-Duration (LD) Grid Battery SystemsHigh-Rate (HR) Grid

Battery System

Model Number** GBS-C53-LD40 GBS-C40-LD28 GBS-C20-LD12 GBS-C53-HR20

Energy Storage 4 MWh 2.8 MWh 1.2 MWh 575kWh

Power Rating 4 MW 2.8 MW 1.2 MW 2 MW

Dimensions (LxWxH)53’ x 8.5’ x 9.5’

(16.2m x 2.6m x 2.9m)40’ x 8.5’ x 9.5’

(12.2m x 2.6m x 2.9m)20’ x 8.5’ x 9.5’

(6.1m x 2.6m x 2.9m)53’ x 8.5’ x 9.5’

(16.2m x 2.6m x 2.9m)

Mass 140,000 lbs 100,000 lbs 47,000 lbs 64,000 lbs

DC Efficiency* 97% (C/2 rate) 96% (1C rate)

DC Voltage 944V nominal (750V – 1050V DC operating range) 960V nominal

(750V – 1050V DC operating range)

Ambient Operating Temperature Range

-30˚C to +50˚C

Enclosure details Containerized, ISO 1496-1 certified, IMO CSC-compliant, designed to IP56 per IEC60529

NEC Energy Solutions, Inc.

155 Flanders Road

Westborough, MA 01581

(508) 497-7319

www.neces.com

© 2014 NEC Energy Solutions, Inc. All rights reserved. MD100120-02