Proprietary & Confidential © 2007-2011 BrightSource Energy, Inc. All rights reserved.

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January 26, 2011

Nuts and Bolts of Technology: Nuts and Bolts of Technology: Closer Look at Closer Look at

Utility-Scale Solar PowerUtility-Scale Solar Power

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BSE Overview

Robust Commercial Pipeline & Project Dev.:

2.6GWs of signed PPAs with PG&E and SCE

Ivanpah ~400MW Electric for PG&E and SCE

Bechtel as EPC and Investor

Siemens Turbine/Riley Boiler

$1.37B DOE loan guarantee

ITC cash grant eligible

NRG Energy lead project investor

Shortlisted for a project in Israel

Selected and approved for a project in Crete

Proven, Environmentally-Responsible Technology:

Highest temperature and pressure solar steam

Dry-cooling reduces water use

Environmentally-friendly design

World Class Team:

Includes the key senior managers of Luz Int’l., which

designed & built over 350 MW of solar thermal plants

in the 1980’s

Project development team with over 20GW power

projects developed, constructed, and managed

Successful Pilot and Demonstration Projects:

SEDC Pilot generating ~100% of modeled energy at

~97% availability; exceeded 6MW design point by ~20%

Chevron Demonstration Solar-to-Steam for Enhanced Oil

Recovery (EOR) nearly complete (solar field 95% erected,

tower erection complete; boiler erection in process, SFINCS

control system onsite)

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Luz Power Tower (LPT 550) TechnologyLuz Power Tower (LPT 550) Technology

Boiler

Power Block

steamsteam

wat

erw

ater

Heliostats

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LPT: Technology to Meet Evolving Performance Needs

Solar Capture: Flexible Field & Fine

Control

Thermal Energy: Multiple Modes

High-Performance Versatile Turbine

RPS RPS andand ReliabilityReliability

Thermal energy is delivered at the precise times and quantities needed in each season through:

•Optimized Solar Field Layout

•Fine Control of Tens of Thousands of Heliostats

State-of-the-art turbine efficiently provides multiple products:

•High quantities of energy (& RPS)

•Reliability services (RA, frequency & voltage support, reactive power, spin, ramping, AGC)

==

Flexible, high-Flexible, high-quality steam quality steam

+ + High-performance High-performance

conventional conventional turbineturbine

Dispatchable, Dispatchable, Shaped OutputShaped Output

+ + Grid Support / Grid Support /

Reliability ServicesReliability Services+ +

Maximum RPS Maximum RPS (w/o tradeoffs)(w/o tradeoffs)

Inexpensive, high-

performance thermal storage

High-temperature, high-pressure

steam

Natural gas augmentation

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Low-impact Design : Fitting the Natural Environment

Plant Design: Maximizes retention of existing vegetation, land contours & natural

features Solar field does not require concrete foundations, and grading and leveling

is extremely limited• Mirrors on pylons placed directly

in the ground to fit natural contours of area, without need for foundations

• Vegetation in the solar field will co-exist below the mirrors, trimmed so mirrors can track the sun

• Soils and vegetation disturbed during construction and operation will be restored

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Water Use: Dry-cooling, Conservation & Closed-loop recycling

Low Impact Design – Limited Water Use

Uses air instead of water to condense steam 95% less water use when compared to CSP using

traditional wet-cooling Uses 25 times less water than

competing trough technologies Uses less than 100 acre feet per year; equal to 300 homes worth of water Closed-loop steam cycle & conservation measures further reduce usage

Efficiency trade-off: Additional costs incurred by using dry-cooling are merited by environmental benefits

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Wet CSP/Conventional Cooling vs. Dry CSP Cooling

*Source: California Energy Commission ^Source: Nuclear, Coal and Combined Cycle numbers from World Economic Forum report - Thirsty Energy: Water and Energy in the 21st Century

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