<SEC-DOCUMENT>0001213900-25-076588.txt : 20250814
<SEC-HEADER>0001213900-25-076588.hdr.sgml : 20250814
<ACCEPTANCE-DATETIME>20250814160018
ACCESSION NUMBER:		0001213900-25-076588
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		3
CONFORMED PERIOD OF REPORT:	20250812
FILED AS OF DATE:		20250814
DATE AS OF CHANGE:		20250814

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Weichai America Corp.
		CENTRAL INDEX KEY:			0001702521
		ORGANIZATION NAME:           	
		STATE OF INCORPORATION:			IL
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-35944
		FILM NUMBER:		251218370

	BUSINESS ADDRESS:	
		STREET 1:		3100 GOLF ROAD
		CITY:			ROLLING MEADOWS
		STATE:			IL
		ZIP:			60008
		BUSINESS PHONE:		847-725-7030

	MAIL ADDRESS:	
		STREET 1:		3100 GOLF ROAD
		CITY:			ROLLING MEADOWS
		STATE:			IL
		ZIP:			60008

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Weichai Power Co., Ltd.
		CENTRAL INDEX KEY:			0001703367
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-35944
		FILM NUMBER:		251218369

	BUSINESS ADDRESS:	
		STREET 1:		SECTION A 197, FU SHOU EAST STREET
		STREET 2:		HIGH TECHNOLOGY INDUSTRIAL DEVELOP. ZONE
		CITY:			WEIFANG, SHANDONG PROVINCE
		STATE:			F4
		ZIP:			261061
		BUSINESS PHONE:		0531-82623823

	MAIL ADDRESS:	
		STREET 1:		SECTION A 197, FU SHOU EAST STREET
		STREET 2:		HIGH TECHNOLOGY INDUSTRIAL DEVELOP. ZONE
		CITY:			WEIFANG, SHANDONG PROVINCE
		STATE:			F4
		ZIP:			261061

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Shandong Heavy Industry Group Co., Ltd.
		CENTRAL INDEX KEY:			0001703252
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-35944
		FILM NUMBER:		251218368

	BUSINESS ADDRESS:	
		STREET 1:		#40-1 YANZI SHAN WEST ROAD
		CITY:			JINAN, SHANDONG PROVINCE
		STATE:			F4
		ZIP:			250014
		BUSINESS PHONE:		0531-82623823

	MAIL ADDRESS:	
		STREET 1:		#40-1 YANZI SHAN WEST ROAD
		CITY:			JINAN, SHANDONG PROVINCE
		STATE:			F4
		ZIP:			250014

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			POWER SOLUTIONS INTERNATIONAL, INC.
		CENTRAL INDEX KEY:			0001137091
		STANDARD INDUSTRIAL CLASSIFICATION:	ENGINES & TURBINES [3510]
		ORGANIZATION NAME:           	06 Technology
		EIN:				330963637
		STATE OF INCORPORATION:			IL
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		201 MITTEL DRIVE
		CITY:			WOOD DALE
		STATE:			IL
		ZIP:			60191
		BUSINESS PHONE:		630-350-9400

	MAIL ADDRESS:	
		STREET 1:		201 MITTEL DRIVE
		CITY:			WOOD DALE
		STATE:			IL
		ZIP:			60191

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	FORMAT INC
		DATE OF NAME CHANGE:	20060901

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	FORMAT INC /FA/
		DATE OF NAME CHANGE:	20010321
</SEC-HEADER>
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<TYPE>4
<SEQUENCE>1
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        <issuerName>POWER SOLUTIONS INTERNATIONAL, INC.</issuerName>
        <issuerTradingSymbol>PSIX</issuerTradingSymbol>
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    <reportingOwner>
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            <rptOwnerName>Weichai Power Co., Ltd.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>SECTION A 197, FU SHOU EAST STREET</rptOwnerStreet1>
            <rptOwnerStreet2>HIGH-TECH INDUSTRIAL DEV. ZONE</rptOwnerStreet2>
            <rptOwnerCity>WEIFANG, SHANDONG PROVINCE</rptOwnerCity>
            <rptOwnerState>F4</rptOwnerState>
            <rptOwnerZipCode>261061</rptOwnerZipCode>
            <rptOwnerStateDescription>CHINA</rptOwnerStateDescription>
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    <reportingOwner>
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            <rptOwnerState>F4</rptOwnerState>
            <rptOwnerZipCode>250014</rptOwnerZipCode>
            <rptOwnerStateDescription>CHINA</rptOwnerStateDescription>
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            <otherText></otherText>
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    <aff10b5One>0</aff10b5One>

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                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Explanation of Responses</value>
                    <footnoteId id="F12"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
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                    <value>I</value>
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                <natureOfOwnership>
                    <value>See Explanation of Responses</value>
                    <footnoteId id="F12"/>
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        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
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                <value>2025-08-12</value>
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                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
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            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1349</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>89.3436</value>
                    <footnoteId id="F4"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>11742058</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Explanation of Responses</value>
                    <footnoteId id="F12"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
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                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
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            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>8517</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>90.2834</value>
                    <footnoteId id="F5"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
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                <sharesOwnedFollowingTransaction>
                    <value>11733541</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Explanation of Responses</value>
                    <footnoteId id="F12"/>
                </natureOfOwnership>
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        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
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                <footnoteId id="F1"/>
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            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>10618</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>91.6147</value>
                    <footnoteId id="F6"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
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                </transactionAcquiredDisposedCode>
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                <sharesOwnedFollowingTransaction>
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                </sharesOwnedFollowingTransaction>
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                <natureOfOwnership>
                    <value>See Explanation of Responses</value>
                    <footnoteId id="F12"/>
                </natureOfOwnership>
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                <footnoteId id="F1"/>
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                <transactionShares>
                    <value>12651</value>
                </transactionShares>
                <transactionPricePerShare>
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                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Explanation of Responses</value>
                    <footnoteId id="F12"/>
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        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
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                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
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                    <value>12436</value>
                </transactionShares>
                <transactionPricePerShare>
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                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Explanation of Responses</value>
                    <footnoteId id="F12"/>
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        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
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                <value>Common Stock</value>
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            <transactionDate>
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                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
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            <transactionTimeliness></transactionTimeliness>
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                <transactionShares>
                    <value>15838</value>
                </transactionShares>
                <transactionPricePerShare>
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                    <footnoteId id="F9"/>
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                <sharesOwnedFollowingTransaction>
                    <value>11681998</value>
                </sharesOwnedFollowingTransaction>
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                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Explanation of Responses</value>
                    <footnoteId id="F12"/>
                </natureOfOwnership>
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        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
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            <transactionDate>
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            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
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            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>46827</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>95.5188</value>
                    <footnoteId id="F10"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
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                <sharesOwnedFollowingTransaction>
                    <value>11635171</value>
                </sharesOwnedFollowingTransaction>
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            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Explanation of Responses</value>
                    <footnoteId id="F12"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2025-08-12</value>
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            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
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            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>9176</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>96.1923</value>
                    <footnoteId id="F11"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
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            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>11625995</value>
                </sharesOwnedFollowingTransaction>
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            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Explanation of Responses</value>
                    <footnoteId id="F12"/>
                </natureOfOwnership>
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        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
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            <transactionDate>
                <value>2025-08-12</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>58</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>97.02</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>11625937</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Explanation of Responses</value>
                    <footnoteId id="F12"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">These transactions occurred pursuant to broker-dealer sales conducted in accordance with Rule 144 under the Securities Act of 1933, as amended.</footnote>
        <footnote id="F2">The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $87.83 to $87.89, inclusive. The Reporting Persons (as defined below) undertake to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the range set forth in this footnote.</footnote>
        <footnote id="F3">The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $88.00 to $88.965, inclusive. The Reporting Persons undertake to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the range set forth in this footnote.</footnote>
        <footnote id="F4">The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $89.03 to $89.95, inclusive. The Reporting Persons undertake to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the range set forth in this footnote.</footnote>
        <footnote id="F5">The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $90.00 to $90.99, inclusive. The Reporting Persons undertake to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the range set forth in this footnote.</footnote>
        <footnote id="F6">The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $91.11 to $91.97, inclusive. The Reporting Persons undertake to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the range set forth in this footnote.</footnote>
        <footnote id="F7">The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $92.00 to $92.98, inclusive. The Reporting Persons undertake to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the range set forth in this footnote.</footnote>
        <footnote id="F8">The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $93.005 to $93.98, inclusive. The Reporting Persons undertake to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the range set forth in this footnote.</footnote>
        <footnote id="F9">The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $94.00 to $94.995, inclusive. The Reporting Persons undertake to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the range set forth in this footnote.</footnote>
        <footnote id="F10">The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $95.00 to $95.9975, inclusive. The Reporting Persons undertake to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the range set forth in this footnote.</footnote>
        <footnote id="F11">The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $96.00 to $96.89, inclusive. The Reporting Persons undertake to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the range set forth in this footnote.</footnote>
        <footnote id="F12">This report is filed jointly by Weichai America Corp., Weichai Power Co., Ltd. and Shandong Heavy Industry Group Co., Ltd. (collectively, the &quot;Reporting Persons&quot;). Weichai America Corp. is the direct owner of the Common Stock referenced in this report and shares the power to vote and the power to dispose of all of such shares of Common Stock with the other Reporting Persons. No individual has beneficial ownership over the Common Stock beneficially owned by the Reporting Persons.</footnote>
    </footnotes>

    <remarks>Exhibit List:

Exhibit 24.1 - Power of Attorney (Weichai Power Co., Ltd.)
Exhibit 24.2 - Power of Attorney (Shandong Heavy Industry Group Co., Ltd.)</remarks>

    <ownerSignature>
        <signatureName>/s/ Jinguang Liu (aka Jin Liu), Chief Financial Officer, Weichai America Corp.</signatureName>
        <signatureDate>2025-08-14</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Chenglong Sun, Authorized Representative, Weichai Power Co., Ltd.</signatureName>
        <signatureDate>2025-08-14</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Chenglong Sun, Authorized Representative, Shandong Heavy Industry Group Co., Ltd.</signatureName>
        <signatureDate>2025-08-14</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24.1
<SEQUENCE>2
<FILENAME>ea025258901ex24-1_power.htm
<DESCRIPTION>POWER OF ATTORNEY (WEICHAI POWER CO., LTD.)
<TEXT>
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<P STYLE="margin-top: 0; margin-bottom: 0"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: right"><B>Exhibit 24.1</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center"><B>Power of Attorney </B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: justify; text-indent: 0.25in">I, Ma Changhai, am
the legal representative of Weichai Power Co., Ltd. (the &ldquo;<B>Company</B>&rdquo;).</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: justify; text-indent: 0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: justify; text-indent: 0.25in">Whereas the Company&rsquo;s
subsidiary, Weichai America Corp.(&ldquo;<B>Wechai America</B>&rdquo;), intends to sell a portion of its shares of common stock in Power
Solutions International, Inc. (&ldquo;<B>PSI</B>&rdquo;), and pursuant to Section 13(d) and 16(a) of the U.S. Securities Exchange Act
of 1934, Weichai America is required to file an amendment to Schedule 13D and to submit Form 4. In accordance with the relevant provisions
of the aforementioned regulations, the Company, as an indirect beneficial owner of PSI, must also have duly authorized representatives
execute relevant legal documents, including the Schedule 13D amendment and Form 4.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: justify; text-indent: 0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: justify; text-indent: 0.25in">Now, therefore, I
hereby authorize and appoint Sun Chenglong as the authorized representative of the Company to execute, on behalf of the Company, all relevant
legal documents, including the Schedule 13D amendment and Form 4, for the aforementioned matters.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: justify; text-indent: 0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: justify; text-indent: 0.25in">Term of Authorization:
From August 12, 2025, until the completion of the authorized matters.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: justify; text-indent: 0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: justify; text-indent: 0.25in">The authorized representative
shall not have the right to sub-delegate. This authorization is hereby granted.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: justify; text-indent: 24pt">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: right; text-indent: 24pt">Company<FONT STYLE="font-family: Times New Roman, Times, Serif">: </FONT><U>Weichai
Power Co., Ltd.</U></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: right; text-indent: 24pt">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: right; text-indent: 24pt">Legal
Representative: <U>/s/ Ma Changhai</U></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: right; text-indent: 24pt">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: right; text-indent: 24pt">Authorized
Representative<FONT STYLE="font-family: Times New Roman, Times, Serif">: </FONT><U>/s/
Sun Chenglong</U></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: right; text-indent: 24pt">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: right; text-indent: 184.2pt">Date: August 8, 2025</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: left">&nbsp;</P>

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</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24.2
<SEQUENCE>3
<FILENAME>ea025258901ex24-2_power.htm
<DESCRIPTION>POWER OF ATTORNEY (SHANDONG HEAVY INDUSTRY GROUP CO., LTD.)
<TEXT>
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<P STYLE="margin-top: 0; margin-bottom: 0"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: right"><B>Exhibit 24.2</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: right">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center"><B>Power of Attorney </B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: justify; text-indent: 0.25in">I, Wang Zhijian,
am the general manager of Shandong Heavy Industry Group Co., Ltd. (the &ldquo;<B>Company</B>&rdquo;).</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: justify; text-indent: 0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: justify; text-indent: 0.25in">Whereas the Company&rsquo;s
indirect holding subsidiary, Weichai America Corp.(&ldquo;<B>Wechai America</B>&rdquo;), intends to sell a portion of its shares of common
stock in Power Solutions International, Inc. (&ldquo;<B>PSI</B>&rdquo;), and pursuant to Section 13(d) and 16(a) of the U.S. Securities
Exchange Act of 1934, Weichai America is required to file an amendment to Schedule 13D and to submit Form 4. In accordance with the relevant
provisions of the aforementioned regulations, the Company, as an indirect beneficial owner of PSI, must also have duly authorized representatives
execute relevant legal documents, including the Schedule 13D amendment and Form 4.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: justify; text-indent: 0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: justify; text-indent: 0.25in">Now, therefore, I
hereby authorize and appoint Sun Chenglong as the authorized representative of the Company to execute, on behalf of the Company, all relevant
legal documents, including the Schedule 13D amendment and Form 4, for the aforementioned matters.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: justify; text-indent: 0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: justify; text-indent: 0.25in">Term of Authorization:
From August 5, 2025, until the completion of the authorized matters.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: justify; text-indent: 0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: justify; text-indent: 0.25in">The authorized representative
shall not have the right to sub-delegate. This authorization is hereby granted.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: justify; text-indent: 0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: right; text-indent: 22pt">Company: <U>Shandong
Heavy Industry Group Co., Ltd.</U></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: right; text-indent: 22pt">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: right; text-indent: 24pt">General
Manager<FONT STYLE="font-family: Times New Roman, Times, Serif">: </FONT><U>/s/ Wang Zhijian
</U></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: right; text-indent: 24pt">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: right; text-indent: 24pt">Authorized
Representative: <U>/s/ Sun Chenglong</U></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: right; text-indent: 24pt">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: right; text-indent: 125.95pt">Date<FONT STYLE="font-family: Times New Roman, Times, Serif">: </FONT>August
5, 2025 </P>

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