    <SEC-DOCUMENT>0001104659-20-136430-index.html : 20201217
    <SEC-HEADER>0001104659-20-136430.hdr.sgml : 20201217
    <ACCEPTANCE-DATETIME>20201216181231
    ACCESSION NUMBER:		0001104659-20-136430
    CONFORMED SUBMISSION TYPE:	S-4
    PUBLIC DOCUMENT COUNT:		12
    FILED AS OF DATE:		20201217
    DATE AS OF CHANGE:		20201216

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			Star Peak Energy Transition Corp.
    		CENTRAL INDEX KEY:			0001758766
    		STANDARD INDUSTRIAL CLASSIFICATION:	BLANK CHECKS [6770]
    		IRS NUMBER:				851972187
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		S-4
    		SEC ACT:		1933 Act
    		SEC FILE NUMBER:	333-251397
    		FILM NUMBER:		201393610

    	BUSINESS ADDRESS:
    		STREET 1:		C/O MAGNETAR CAPITAL LLC
    		STREET 2:		1603 ORRINGTON AVENUE, 13TH FLOOR
    		CITY:			EVANSTON
    		STATE:			IL
    		ZIP:			60201
    		BUSINESS PHONE:		847-905-4400

    	MAIL ADDRESS:
    		STREET 1:		C/O MAGNETAR CAPITAL LLC
    		STREET 2:		1603 ORRINGTON AVENUE, 13TH FLOOR
    		CITY:			EVANSTON
    		STATE:			IL
    		ZIP:			60201

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	Star Peak Energy Acquisition Corp.
    		DATE OF NAME CHANGE:	20181119

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	Roaring Fork Acquisition Corp.
    		DATE OF NAME CHANGE:	20181109
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>S-4
    <SEQUENCE>1
    <FILENAME>tm2037914-1_s4.htm
    <DESCRIPTION>S-4
    <TEXT>
    Document 1 - file: tm2037914-1_s4.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-23.1
    <SEQUENCE>2
    <FILENAME>tm2037914d2_ex23-1.htm
    <DESCRIPTION>EXHIBIT 23.1
    <TEXT>
    Document 2 - file: tm2037914d2_ex23-1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-23.2
    <SEQUENCE>3
    <FILENAME>tm2037914d2_ex23-2.htm
    <DESCRIPTION>EXHIBIT 23.2
    <TEXT>
    Document 3 - file: tm2037914d2_ex23-2.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>lg_starpeak-4clr.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 4 - file: lg_starpeak-4clr.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>lg_stem-4clr.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 5 - file: lg_stem-4clr.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>tm2037914d1-bc_stem4c.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 6 - file: tm2037914d1-bc_stem4c.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>tm2037914d1-bc_united4c.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 7 - file: tm2037914d1-bc_united4c.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>tm2037914d1-fc_organizonbw.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 8 - file: tm2037914d1-fc_organizonbw.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>tm2037914d1-lc_growth4c.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 9 - file: tm2037914d1-lc_growth4c.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>tm2037914d1-lc_nuclear4c.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 10 - file: tm2037914d1-lc_nuclear4c.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>tm2037914d1-tbl_meter4clr.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 11 - file: tm2037914d1-tbl_meter4clr.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>12
    <FILENAME>tm2037914d1-tbl_patent4clr.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 12 - file: tm2037914d1-tbl_patent4clr.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>