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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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<SEC-DOCUMENT>0001144204-09-049424.txt : 20090922
<SEC-HEADER>0001144204-09-049424.hdr.sgml : 20090922
<ACCEPTANCE-DATETIME>20090922150512
ACCESSION NUMBER:		0001144204-09-049424
CONFORMED SUBMISSION TYPE:	424B3
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20090922
DATE AS OF CHANGE:		20090922

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ACORN ENERGY, INC.
		CENTRAL INDEX KEY:			0000880984
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-COMPUTER PROGRAMMING SERVICES [7371]
		IRS NUMBER:				222786081
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		424B3
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-143421
		FILM NUMBER:		091080706

	BUSINESS ADDRESS:	
		STREET 1:		4 WEST ROCKLAND ROAD
		CITY:			MONTCHANIN
		STATE:			DE
		ZIP:			19710
		BUSINESS PHONE:		3026561708

	MAIL ADDRESS:	
		STREET 1:		4 WEST ROCKLAND ROAD
		CITY:			MONTCHANIN
		STATE:			DE
		ZIP:			19710

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ACORN FACTOR, INC.
		DATE OF NAME CHANGE:	20060920

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	DATA SYSTEMS & SOFTWARE INC
		DATE OF NAME CHANGE:	19931019

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	DEFENSE SOFTWARE & SYSTEMS INC
		DATE OF NAME CHANGE:	19930328
</SEC-HEADER>
<DOCUMENT>
<TYPE>424B3
<SEQUENCE>1
<FILENAME>v160997_424b3.txt
<TEXT>
                                                Filed pursuant to Rule 424(b)(3)
                                                     Registration No. 333-143421


               Prospectus Supplement No.1 dated September 22, 2009
           To the Prospectus of Acorn Energy, Inc. dated April 7, 2009
  (included in Registration Statement on Form S-3, Registration No. 333-143421)


         The Prospectus under the caption "Selling Security Holders" indicates
that Harvey Brown is a selling security holder with respect to 16,448 shares of
common stock of the company issuable upon the exercise of warrants. He has
transferred certain of his warrants exercisable for 8,224 shares to Andrew Myles
Brown. As a result of the transfer, Andrew Myles Brown will be a selling
security holder under the Prospectus with respect to 8,224 shares of common
stock of the company issuable upon exercise of warrants, and Harvey Brown will
be a selling security holder under the Prospectus with respect to 8,224 shares
of common stock of the company issuable upon exercise of warrants.

</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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