Filed pursuant to Rule 425
Filed by SunPower
Corporation Pursuant to Rule
425 Under the Securities Act of 1933 And Deemed
Filed Pursuant to 14a-12 Under the Securities Act
of 1934
Subject Company: SunPower
Corporation
Commission File No.: 000-51593


PowerLight Acquisition
November, 2006


This presentation contains forward looking statements as defined
in the Private Securities Litigation Reform Act of 1995. This
press release contains forward looking statements as defined in the Private Securities Litigation Reform Act of 1995.  We use
words such as “believes,”
“plans”
and “expects”
and similar expressions to identify forward-looking statements.  Forward-looking
statements in this presentation include, but are not limited to,
statements related to the benefits of the proposed transaction
between SunPower and PowerLight, the completion of the transaction, our plans and expectations for financial performance, the
accretive nature of the transaction and our ability to meet our long term financial model and margin projections, and the
development and future cost structure of the solar power industry.  These forward-looking statements involve a number of risks
and uncertainties that could cause actual results to differ materially from those anticipated by these forward-looking statements,
including
difficulties
encountered
in
integrating
the
merged
businesses;
the
risk
that
the
transaction
does
not
close,
including
the
risk
that
requisite
stockholder
and
regulatory
approvals
may
not
be
obtained; the possibility that expected synergies and cost
savings will not be obtained; the uncertainty of business and economic conditions and growth trends in the solar power industry;
our
ability
to
obtain
adequate
supply
of
polysilicon
and
silicon
ingots
to
manufacture
our
products
and
the
price
we
pay
for
such
material, our ability to ramp new production lines, our ability to realize expected manufacturing efficiencies, the possibility of
production difficulties, the risk of continuation of supply of products and components from suppliers to PowerLight, including
competitors of SunPower, and the continuation of existing large-scale PowerLight customer projects, and other risk factors are
contained in documents that the company files with the SEC, including the Form 10-K for fiscal 2005 and its recent 10-Qs, as well
as filings we make with regard to this transaction. SunPower is under no obligation to, and expressly disclaims any responsibility
to update or alter, its forward-looking statements, whether as a result of new information, future events or otherwise.
Note that the financial information includes and identifies as such, non-GAAP financial information.  Management will provide a
reconciliation to GAAP for this financial information.
Safe Harbor Statement


SunPower plans to file with the SEC a Registration Statement on Form S-4 in
connection with the transaction.
The Registration Statement will contain important information about SunPower,
PowerLight, the transaction and related matters. Investors and security holders
are urged to read the Registration Statement carefully when they
are available.
Investors and security holders will be able to obtain free copies of the
Registration Statement and other documents filed with the SEC by
SunPower
through the web site maintained by the SEC at www.sec.gov. In addition,
investors and security holders will be able to obtain free copies of the
Registration Statement from SunPower by contacting Investor Relations at
408-240-5588 or http://investors.sunpowercorp.com/sec.cfm.
Important Registration Information


PowerLight Agreement Summary
$265 MM upfront consideration
$67.5 MM retention carve-out vesting over 2-4 years
Tax-free merger; 40% cash and 60% stock
Definitive agreement signed November 15, 2006
Closing Q1 ’07 subject to customary closing conditions


PowerLight Acquisition Benefits
Investor Value
Accelerate revenue and EPS growth
EPS accretive (Non-GAAP)
Maintain long-term financial model objectives: 30/10/20


PowerLight Acquisition Benefits
Investor Value
Accelerate revenue and EPS growth
EPS accretive (Non-GAAP)
Maintain long-term financial model: 30/10/20
Strategic Objectives
Extend leadership in key applications and markets
Apply technology leadership across the value chain
Accelerate product innovation to drive channel efficiency
Radically simplify & improve customer experience


SunPower / PowerLight Goals
Market Leadership
Commercial & residential in target markets
US production homes
Top solar brand
Technology Leadership
Highest efficiency solar cells and panels
Lowest cost / kWh system solutions
Compete with retail electric rates
Reduce installed system cost 50% by 2012


Residential Retrofit
New Production Homes
Commercial & Public
Power Plants
SunPower and PowerLight Applications


Wafer
Solar Cell
Solar Panel
System
Ingot
Highest conversion efficiency
Unique, proprietary technology
Manufacturing excellence
Low engineering labor cost locations
Polysilicon
SunPower Value Chain Focus


PowerLight System Value Chain
Large-scale customer focus
Differentiated, high-value technology 
More than 50 U.S. and international patents
Innovative financial solutions tailored to application
Engineering
Proj. Mngt.
Monitor
Service
Finance


Commercial
Public Sector
Marquee Customer Base
Home Builders


Germany
New Jersey
Broad Geographic Footprint
Nevada
Hawaii
Portugal
Serpa
Ground Breaking Q2 ‘06
California
Spain
Korea
November 2006


#1 US solar roofing product
Light-weight, no roof penetrations
Rapid installation, low labor cost
Insulation and protection value
Leverages high-efficiency panels
PowerLight Technology Leadership: PowerGuard®


PowerLight Software Tools
Web-based solar
system performance
monitoring
Includes real-time home
power consumption data
Automated design
software facilitates
system layout
Reduces system design
and costing effort
Web-based solar
system performance
simulation
Validated with 100s of
systems over 20 years
System Design Tools
PVGrid
Home Services Network


SunPower Technology Leadership
SunPower
215 Watt Panel
Conventional
165 Watt Panel
Superior Performance
Superior Aesthetics
solar


PowerLight’s
Bavaria Solarpark
6.3 MW:
Conventional
8.3 MW:
SunPower


Synergy Example: PowerTilt
Patented next-gen
commercial roofing system
Product design incorporates mounting functionality
Factory assembled by SunPower
Integrated design reduces site labor
Lowest cost / kWh system solution
TM


Synergy Example: SunTile®
Attractive aesthetics
Maximum power
Space efficient
Easy-install design
PowerLight SunTile®
Roof Integrated
System


2007*
Revenue
> $600 MM
EPS (Non-GAAP)
Immediately accretive
Acquisition Financials
Post
Acquisition
Post
Acquisition
Short –
Term Impact
Accelerates revenue and earnings growth
Gross margin deviates by 250 –
350 bps from model during 2007
Long –
Term Goals
$1 billion run-rate revenue (2008)
Achieve 30 / 10 / 20 financial model by late 2008
*Assumes consolidation in the beginning of Q1’07.



Appendix Slides


PowerLight Profile
Over 100 MW deployed or in deployment
Global presence: US, Germany, Southern Europe, Korea
Strong market position for U.S. commercial systems
Strong market position for US solar production new homes
Early market leader in solar power plants
Complementary team and scope, low integration risk
Executive leaders: 50 + years of solar expertise


System Design Leadership Opportunities
Components:
Supply chain:
Monitoring:
Features:
Assembly:
Mark-ups:
Five
Efficient
Performance + load
Integrated and efficient
Factory
30% gross margin model
Today
Today
Tomorrow
Tomorrow
Nine
Complex
Performance
Redundancy
Field & factory
Multiple
Opportunity
Opportunity


Lowest cost tracker
Up to 35% more energy
Single controller drives 250 kW
Leverages high-efficiency cells
Extend Technology Leadership : PowerTracker®


Radically Simplify and Improve the Experience
Educate solar customers
Reduce design and order time
Rationalize equipment delivery
Design to limit installation time
Design to meet needs
Roof life
Insulation value
Aesthetics
Develop and train installers
Integrate performance monitoring
Reward customers


($40)
($20)
$0
$20
$40
$60
1
3
5
7
9
11
13
15
17
19
21
23
25
Year
2006 - CA Incentives
2016  - No Incentives
2016 –
Goal: No Incentives
2006 –
CA Incentives
Solar Customer Cash Flow
($ Thousands)
California Residential Solar Customer Economics 


$0
$10
$20
$30
$40
$50
$60
$70
Q1
Q2
Q3
Q4
Q1
Q2
Q3
Q4F
Quarterly Revenue
($ Millions)
$11
$16
$22
$29
$55
2005
2006
$70-72
SunPower
Revenue Growth
$42
$65


Actual
9/30/05
Actual
9/30/05
Sales
(1)
Gross Margin
Operating Expense
Operating Margin
19%
18%
0.4%
$22
Actual
9/30/06
Actual
9/30/06
25%
12%
13%
$65
Q4 2006
(Street)
Q4 2006
(Street)
26%
11%
15%
$71
Long Term
Target
Long Term
Target
30%
10%
20%
Note: Excludes non-cash charges.
(1) Sales estimates are First Call Consensus estimates.
30%+ CAGR
($ Millions)
SunPower
Financial Results and Plan


0
100
200
300
400
At IPO
Today
Q4 2006
2007F
2008F
Installed Capacity
(MW / year)
Line 1
Lines 1-3
Lines 1-4
Lines 8-12
Lines 5-7
Cell Manufacturing Ramp Plan


Wafer
Solar Cell
Solar Panel
System
Ingot
Polysilicon
Upstream Landscape
High concentration of poly and ingot suppliers
Poly prices and margins are attracting new entrants
Approach: partner with new capacity providers
Ingot manufacturing is next supply bottleneck
Approach: JV in ingot manufacturing for 2007 and beyond


Growth Aligned With Silicon Supply
Silicon Supply Position (MW)
0
50
100
150
200
250
2007F
2008F
Jan 1 Capacity
Annual Silicon


Conventional
Solar Cell
14 -
17%
Efficiency
SunPower’s
Solar Cell 
20 -
22% 
Efficiency
P
N
Light
Electrical
contacts
P
P
P
N
N
N
Electrical contacts
Backside mirror
Light
Solar Cell Technology Comparison
Silicon wafer
Silicon wafer