    <SEC-DOCUMENT>0001628280-23-011113-index.html : 20230407
    <SEC-HEADER>0001628280-23-011113.hdr.sgml : 20230407
    <ACCEPTANCE-DATETIME>20230407160626
    ACCESSION NUMBER:		0001628280-23-011113
    CONFORMED SUBMISSION TYPE:	ARS
    PUBLIC DOCUMENT COUNT:		1
    CONFORMED PERIOD OF REPORT:	20221231
    FILED AS OF DATE:		20230407
    DATE AS OF CHANGE:		20230407
    EFFECTIVENESS DATE:		20230407

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			ESS Tech, Inc.
    		CENTRAL INDEX KEY:			0001819438
    		STANDARD INDUSTRIAL CLASSIFICATION:	MISCELLANEOUS ELECTRICAL MACHINERY, EQUIPMENT & SUPPLIES [3690]
    		IRS NUMBER:				000000000
    		STATE OF INCORPORATION:			E9
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		ARS
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-39525
    		FILM NUMBER:		23808834

    	BUSINESS ADDRESS:
    		STREET 1:		26440 SW PARKWAY AVE.
    		STREET 2:		BLDG. 83
    		CITY:			WILSONVILLE
    		STATE:			OR
    		ZIP:			97070
    		BUSINESS PHONE:		(855) 423-9920

    	MAIL ADDRESS:
    		STREET 1:		26440 SW PARKWAY AVE.
    		STREET 2:		BLDG. 83
    		CITY:			WILSONVILLE
    		STATE:			OR
    		ZIP:			97070

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	ACON S2 Acquisition Corp.
    		DATE OF NAME CHANGE:	20200728
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>ARS
    <SEQUENCE>1
    <FILENAME>a2022esstechinc-annualrepo.pdf
    <DESCRIPTION>ARS
    <TEXT>
    Document 1 - file: a2022esstechinc-annualrepo.pdf

    </DOCUMENT>
    </SEC-DOCUMENT>