Binyamin Koretz

Proprietary & Confidential © 2009 BrightSource Energy, Inc. All rights reserved.1 © 2007 – 2010 BrightSource Energy, Inc. All rights reserved.1 © 2007 – 2010 BrightSource Energy, Inc. All rights reserved.© 2007 – 2010 BrightSource Energy, Inc. All rights reserved.

November 2010

BrightSource Energy’s Solar BrightSource Energy’s Solar Energy Development CenterEnergy Development Center


BrightSource Energy Our business:

Developing and building utility-scale solar power plants

The company: Headquarters in Oakland, Calif. R&D/Engineering subsidiary in

Jerusalem 2,610 MW in signed PPAs in

California The team:

Key managers of Luz who designed and built more than 350 MW of solar thermal plants in the 1980s

World class project development team with over 20GW of power projects developed, constructed, and managed


The Solar Energy Development CenterThe Solar Energy Development Center

Located on 20 acres in the Negev Desert – 2 hrs from JerusalemLocated on 20 acres in the Negev Desert – 2 hrs from Jerusalem The largest solar energy facility in the Middle EastThe largest solar energy facility in the Middle East Inaugurated June 2008 and operating continuously in 2009Inaugurated June 2008 and operating continuously in 2009


The Solar Energy Development CenterThe Solar Energy Development Center

6 MW thermal power – utility-quality steam at 540°C, 140 bar6 MW thermal power – utility-quality steam at 540°C, 140 bar 15m forced-recirculation drum boiler + superheater atop 60m tower15m forced-recirculation drum boiler + superheater atop 60m tower 12,000 m12,000 m22 total reflecting area: 1,640 heliostats, each 3.25m X 2.25m total reflecting area: 1,640 heliostats, each 3.25m X 2.25m


The SEDC Solar Field

The pilot solar field is a wedge cut out of a 360° surround field


The SEDC Solar FieldThe SEDC Solar Field


The pilot receiver is a 5m section of afull-sized receiver

The SEDC Receiver

16.5m X 16.5m16.5m X 16.5m

5msection


The SEDC ReceiverThe SEDC Receiver


SEDC in OperationSEDC in Operation

Proprietary & Confidential © 2009 BrightSource Energy, Inc. All rights reserved.10 © 2007 – 2010 BrightSource Energy, Inc. All rights reserved.Proprietary & Confidential © 2007-2010© 2007 – 2010 BrightSource Energy, Inc. All rights reserved.

Full-Year Operation – Key Figures

Maximum absorbed power: 6.04 MW on September 1 Reached 6 MW design point of the SEDC pilot receiver

• After we removed 10% of heliostats for upgrade in mid-September, we continued to reach corresponding peak power levels

Peak solar-to-thermal efficiency of 54% despite small receiver size

Average absorbed power increased by 10% over the course of the summer 2009 operating period to 5 MW during midday peak-insolation hours

Average solar field availability of 97.4% for the year Average daily performance-to-model tracking improved

to 98% accuracy by late summer and continued improving to approximately 100% accuracy by the end of the year


12-Month Operating Highlights 131 days of regular

operation (out of 243 non-holiday weekdays)

44 days of scheduled testsand/or maintenance

60 days of bad weather (wind and/or clouds)

8 days with data file problems or opns fault

Average daily insolation(during operating hours) 45 good days (800-900

W/m2) 50 fair days (700-800

W/m2) 36 poor days (<700

W/m2)

Su Mo Tu We Th Fr Sa

JUNE

Jun 1 2 3 4 5 6

7 8 9 10 11 12 13

14 15 16 17 18 19 20

21 22 23 24 25 26 27

28 29 30 Jul 1 2 3 4

JULY

5 6 7 8 9 10 11

12 13 14 15 16 17 18

19 20 21 22 23 24 25

26 27 28 29 30 31 Aug 1

AUGUST

2 3 4 5 6 7 8

9 10 11 12 13 14 15

16 17 18 19 20 21 22

23 24 25 26 27 28 29

30 31 Sep 1 2 3 4 5

SEPT

6 7 8 9 10 11 12

13 14 15 16 17 18 19

20 21 22 23 24 25 26

27 28 29 30 Oct 1 2 3

OCT

4 5 6 7 8 9 10

11 12 13 14 15 16 17

18 19 20 21 22 23 24

25 26 27 28 29 30 31

NOV

Nov 1 2 3 4 5 6 7

8 9 10 11 12 13 14

15 16 17 18 19 20 21

22 23 24 25 26 27 28

29 30

Su Mo Tu We Th Fr Sa

DEC

Dec 1 2 3 4 5

6 7 8 9 10 11 12

13 14 15 16 17 18 19

20 21 22 23 24 25 26

27 28 29 30 31 Jan 1 2

JAN

3 4 5 6 7 8 9

10 11 12 13 14 15 16

17 18 19 20 21 22 23

24 25 26 27 28 29 30

31 Feb 1 2 3 4 5 6

FEB

7 8 9 10 11 12 13

14 15 16 17 18 19 20

21 22 23 24 25 26 27

28 Mar 1 2 3 4 5 6

MARCH

7 8 9 10 11 12 13

14 15 16 17 18 19 20

21 22 23 24 25 26 27

28 29 30 31 Apr 1 2 3

APRIL

4 5 6 7 8 9 10

11 12 13 14 15 16 17

18 19 20 21 22 23 24

25 26 27 28 29 30 May 1

MAY

2 3 4 5 6 7 8

9 10 11 12 13 14 15

16 17 18 19 20 21 22

23 24 25 26 27 28 29

30 31

Regular operation Validation / maintenance

No operation – weekend/holiday

No operation – weather

Data problems / operation fault


0

1

2

3

4

5

6

Averageoutput(MW)

duringsteady-state

hours

Operating Days

10% heliostatreduction

Performance – Average Steady-State Output Average daily performance

during “steady-state” hours rose from 4.5MW to 5MW during the summer of 2009 due to receiver cleaning and heliostat calibration system upgrade; season performance improvement continued until December

After the 10% reduction in heliostats, average steady-state performance stayed between 4.5MW and 5MW on good days, with a seasonal decrease in spring

Poor weather in the spring shows up both in the performance of good days (where afternoon wind or clouds cut operations short) and in the attempt to operate on the frequent poor days

Steady state comprises those hours of the day when insolation levels off, and steam pressure is maintained at the optimal operating level

June 2009 May 2010

Seasonal increase

due to sun angleSeasonal decreasedue to sun angle


0

5

10

15

20

25

30

35

40

45

50

Daily energy(MWh)

Operating Days

Performance – Daily Energy Production Daily energy production

is obviously higher on good insolation days and on the longer days of summer, but length of the working day also varies for logistical reasons

The working day at SEDC was lengthened as the summer of 2009 progressed in order to validate start-up and shutdown procedures

Winter and spring days often start late because of morning clouds, or are cut short because of afternoon winds or clouds

Total thermal energy produced on regular operating days including days without steady-state operation, excluding days without at least 2-3 hours operation

June 2009 May 2010

10% heliostat reduction


Performance vs. Model Trendline shows

improvement from 90% a year ago to ~100%.Most of the improvement was due to better performance, not better modeling!

Intermittent clouds are responsible for most low-correlation days

Bias was largely eliminated and intradayresults improved by bettermodeling of thermal inertia (thermal inertia is the absorption and release of thermal energy by the mass of the receiver itself, as opposed to the water/steam in the receiver tubes)

0.75

0.80

0.85

0.90

0.95

1.00

1.05

1.10

1.15

Ratio ofactual toexpected

performance

Operating DaysJune 2009 May 2010

Daily correlation of actual performance to expected values based on BSII solar-to-flux model

Trendline(linear regression)


Solar Field Availability Solar field availability

averaged over 97% for all regular operating days

Days with special circumstances such as early shutdowns due to clouds or operations faults are not included in the chart or in the average, because of the difficulty in presenting an accurate average daily availability

Our expectation for SEDC was 95% because of prototype-stage heliostat production, and bodes well for the 99% availability projected for industrialized heliostats at Ivanpah

Only steady-state hours are counted because heliostats are added incrementally during morning ramp-up.

0.6

0.65

0.7

0.75

0.8

0.85

0.9

0.95

1

Average daily

heliostat availability

Operating Days

Proprietary & Confidential © 2009 BrightSource Energy, Inc. All rights reserved.16 © 2007 – 2010 BrightSource Energy, Inc. All rights reserved.© 2007 – 2010 BrightSource Energy, Inc. All rights reserved.

Project Scale-up

Solar EnergyDevelopment

Center2008

(6 MWth)

Solar Thermal Chevron EORDemo Plant

2010/1(29 MWth)

Ivanpah SolarPower Complex

2012/3(392 MWe)


1999 Harrison St.Suite 2150Oakland, CA 94602(510) 550-8161

11 Kiryat Mada St.Har Hotzvim Tech ParkJerusalem 91450+972 77-202-5000

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Binyamin Koretz