Sunpower (SPWRQ) 8-K Results of Operations and Financial Condition

Exhibit 99.4

Supplemental Operating Performance and Manufacturing Ramp Information

November 11, 2010

Please Note:

All data in millions of dollars except earnings per share and as noted

Guidance is as of November 11, 2010 and the company assumes no responsibility to update guidance in the future.

Non-GAAP to GAAP reconcilliations for each quarterly period is available in each respective quarters' earnings release and investor presentation issued concurrently which can be found by clicking the links provided below the posting of this document

GAAP (in millions $ except EPS)
		Q3 2010			Q2 2010			Q1 2010			Q4 2009			Q3 2009
Revenue	$	550.6		$	384.2		$	347.3		$	547.9		$	465.4
Gross Margin		20.4	%		22.9	%		20.7	%		20.3	%		21.5	%
Operating Income	$	8.2		$	(1.7	)	$	(2.9	)	$	42.7		$	46.2
EPS (diluted)	$	0.21		$	(0.07	)	$	0.13		$	0.09		$	0.20
Tax rate		21.0	%		152.3	%		-144.1	%		81.9	%		54.2	%
Share Count (m)		105.6			95.6			96.5			96.4			105.0
Non-GAAP (in millions $ except EPS)
		Q3 2010			Q2 2010			Q1 2010			Q4 2009			Q3 2009
Revenue	$	553.8		$	392.1		$	347.3		$	547.9		$	465.4
Gross Margin		22.3	%		26.3	%		22.5	%		21.7	%		23.1	%
Operating Income	$	45.2		$	33.0		$	13.5		$	60.3		$	63.8
EPS (diluted)	$	0.26		$	0.15		$	0.05		$	0.47		$	0.46
Tax rate		15.4	%		20.3	%		25.9	%		20.3	%		25.3	%
Share Count (m)		105.6			96.8			96.5			96.4			105.0
Business Units (Non-GAAP, in millions $)*
		Q3 2010			Q2 2010			Q1 2010			Q4 2009			Q3 2009
Revenue
UPP	$	261.0		$	127.9		$	144.1		$	224.9		$	195.1
R&C	$	292.8		$	264.2		$	203.2		$	323.1		$	270.2
GM
UPP		20.0	%		26.1	%		24.3	%		24.1	%		27.9	%
R&C		24.3	%		26.5	%		21.3	%		19.9	%		19.6	%
Capex	$	4.3		$	62.0		$	43.7		$	18.2		$	38.0

(All financial data reflects restated financial results)

(*Business Units information reflects change in segmentation initiated in Q2 2010)

Guidance ** (in millions $ except EPS)
GAAP		Q4 2010		FY2010
Revenue	$	870-970		$	2.15 - $2.25B
Gross Margin		19-21	%		20-21	%
EPS (diluted)	$	0.45-$0.60		$	0.75-$0.90
Tax rate		24-28	%		34-42	%
Share Count (m)		106			106
Non-GAAP
Revenue	$	870-970		$	2.15 - $2.25B
Gross Margin		20-22	%		22-23	%
EPS (diluted)	$	0.95-$1.15		$	1.45 - $1.65
Tax rate		12-14	%		13-16	%
Share Count (m)		106			106
Capex				$	125-$150

Fab Manufacturing Ramp (Capacity)

	Line		MW		Fab MW		Year		MW CAP
Fab 1		1		25				2004		25
		2		25				2005		50
		3		25
		4		33		108		2006		108
Fab 2		5		33
		6		33
		7		40
2007 Total				106				2007		214
		8		40
		9		40
		10		40
		11		40
		12		40
2008 Total				200				2008		414
		13		40
		14		40
		15		40
		16		40
2009 Total				160		466		2009		574
Fab 3
2010				5		5		2010		580
2011				350		355		2011		930
2012				650		1,000		2012		1,580
2013				355		1,355		2013		1,935
2014				40		1,400		2014		1,975
Total										1,975

Geographies		Q3 2010			Q2 2010			Q1 2010			Q4 2009			Q3 2009
US		32	%		34	%		30	%		37	%		32	%
EU		61	%		56	%		60	%		57	%		63	%
ROW		7	%		10	%		10	%		6	%		5	%
Balance Sheet		Q3 2010			Q2 2010			Q1 2010			Q4 2009			Q3 2009
Cash**	$	438		$	737		$	877		$	927		$	802
Depreciation	$	26.4		$	24.6		$	24.7		$	24.3		$	21.4
DSO		44			46			58			41			48
Inv Days		60			84			83			43			58
Headcount		5,573			5,358			5,264			5,178			5,160
Manufacturing Metrics		Q3 2010			Q2 2010			Q1 2010			Q4 2009			Q3 2009
Grams / Watt		5.3			5.3			5.5			5.5			5.6
MW Produced		152.1			137.9			135.4			130.2			110.0
**Cash includes Cash, Cash Equivilents, Restricted Cash and Investments

** This supplementary information contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995.

Such forward-looking statements, which do not represent historical facts, include statements regarding (a) expected GAAP and non-GAAP revenue, gross margins, earnings per share, tax rate, share count and capital expenditures, and (b) expected ramp up of manufacturing capacity. Such forward-looking statements are based on information available to the company as of the date of this presentation and involve a number of risks and uncertainties, some beyond the company's control that could cause actual results to differ materially from those anticipated by these  forward-looking statements, including risks and uncertainties described in the company's investor presentation of 11/11/2010, earnings release dated 11/11/2010 and Annual Report for the year ended 1/3/2010, and Quarterly Report for the quarter ended 7/4/2010, and other filin gs with the Securities and Exchange Commission. These forward-looking statements should not be relied upon as representing the company's  views as of any subsequent date, and the company 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.