AMERICAN POWER GROUP CORPORATION Stockholder Consent, Amendment to Securities Purchase Agreement and Termination of Registration Rights Agreement

    

The undersigned, being the holders (the “Holders”) of at least 67% of the outstanding 10% Convertible Preferred Stock (the “Preferred Stock”) of American Power Group Corporation, a Delaware corporation (the “Corporation”), issued and outstanding as of June 1, 2015, do hereby consent to and approve the following:

1.That the resolution of the Corporation’s Board of Directors, adopted on May 30, 2015 pursuant to Section 151(g) of the Delaware General Corporation Law, establishing a series of preferred stock of the Corporation consisting of 275 shares, to be designated as “Series C Convertible Preferred Stock” (the “Series C Preferred Stock”) is hereby ratified, confirmed and approved.

2.That, subject to the satisfaction of the Conversion Conditions (as such term is defined in the Convertible Note Purchase Agreement dated as of June 2, 2015, among the Corporation and the other parties thereto), the Corporation is hereby authorized to file a Certificate of Designation of Preferences, Rights and Limitations of Series C Convertible Preferred Stock, in the form adopted by the Board of Directors (the “Series C Certificate”), with the Secretary of State of Delaware.

3.That, notwithstanding any provision of the Certificate of Designation of Preferences, Rights and Limitations of 10% Convertible Preferred Stock, as filed by the Corporation with the Secretary of State of Delaware on April 30, 2012 (the “Series A Certificate”), the Securities Purchase Agreement dated as of April 30, 2012, among the Corporation and other parties thereto (the “Purchase Agreement”), or any other Transaction Document (as such term is defined in the Purchase Agreement), (a) the Corporation is hereby authorized to issue on or after the date hereof (i) the Corporation’s Subordinated Contingent Convertible Promissory Notes in the aggregate principal amount of up to $2,750,000 (the “Notes”), (ii) subject to the satisfaction of the Conversion Conditions, shares of Series C Preferred Stock upon conversion of the principal amount of, and all accrued interest on, the Notes at a conversion price of $10,000 per share, (iii) upon the conversion of the Notes, warrants to purchase up to 13,750,000 shares of Common Stock with an initial exercise price of $.20 per share, and (iv) all other securities issuable upon the conversion, exercise or exchange of the Series C Preferred Stock and such warrants (all such securities referred to in clauses (i) through (iv), the “New Securities”), (b) the Holders deem each issuance of such New Securities to be an “Exempt Issuance” pursuant to the Series A Certificate, and (c) the Holders waive all adjustments to the Conversion Price (as such term is defined in the Series A Certificate), and all other antidilution protections set forth in the Series A Certificate with respect to the issuance of the New Securities.

4.That, notwithstanding any provisions of the Series A Certificate to the contrary, all of which provisions are hereby waived, the Series C Preferred Stock shall be pari passu with the Preferred Stock in liquidation preference, and as otherwise stated in the Series C Certificate, and neither the Series C Preferred Stock nor the Preferred Stock shall be considered to be Junior Securities (as such term is defined in the Series A Certificate and the Series C Certificate) with respect to the other.

5.That clause (b) of the definition of “Exempt Issuance” in Section 1.1 of the Purchase Agreement be and hereby is amended to read as follows:

“(b) (i) the Securities issued hereunder and securities issued upon the exercise or exchange of or conversion of any Securities issued hereunder along with other securities subsequently issued and sold to the Purchasers in an aggregate amount of up to 1,146 shares of Preferred Stock and the warrants issued in connection with the purchase thereof (including the warrants issuable to the Placement Agent), (ii) up to 200 shares of Series B 10% Convertible Preferred Stock issued or issuable pursuant to any subsequent securities purchase agreement to which the Company is a party, the securities issued or issuable upon the conversion or exchange thereof, the warrants issued in connection with the purchase thereof, and all securities issued or issuable upon the exercise or exchange of such warrants, (iii) subordinated contingent convertible promissory notes in the original principal amount of up to $2,750,000 (the “Notes”) pursuant to that certain Convertible Note Purchase Agreement dated as of June 2, 2015 among the Corporation and other parties thereto, shares of Series C Convertible Preferred Stock issued or issuable upon the conversion of the principal amount of, and all accrued interest on, the Notes, the securities issued or issuable upon the conversion or exchange of such Series C Convertible Preferred Stock, the warrants issued in connection with the conversion of the Notes, and all securities issued or issuable upon the exercise or exchange of such warrants, and/or (iii) other securities exercisable or exchangeable for or convertible into shares of Common Stock issued and outstanding on the date of this Agreement, provided that such securities have not been amended since the date of this Agreement to increase the number of such securities or to decrease the exercise price, exchange price or conversion price of any such securities,”

The undersigned Holders of at least 67% of the Registrable Securities (as such term is defined in the Registration Rights Agreement dated as of April 30, 2012, among the Corporation and the other parties thereto) outstanding as of June 1, 2015 hereby agree, on behalf of all of such parties, that such agreement is terminated as of the date hereof, provided, however, that Section 6 of such agreement shall remain in full force and effect notwithstanding such termination.

This instrument may be executed in counterparts and shall become effective upon its execution by the holders of at least 67% of the outstanding Preferred Stock.