INDEMNIFICATION AGREEMENT

Exhibit 99.3

INDEMNIFICATION AGREEMENT

This Agreement made and entered into this 27 ^th day of November, (the "Agreement"), by and between Plug Power Inc., a Delaware corporation (the "Company," which term shall include, where appropriate, any Entity (as hereinafter defined) controlled directly or indirectly by the Company) and Jean Nelson (the "Indemnitee"):

WHEREAS, it is essential to the Company that it be able to retain and attract as a Chief Financial Officer the most capable person available;

WHEREAS, increased corporate litigation has subjected chief financial officers to litigation risks and expenses, and the limitations on the availability of directors and officers liability insurance have made it increasingly difficult for the Company to attract and retain such persons;

WHEREAS, the Company’s By-laws (the "By-laws") require it to indemnify its officers to the fullest extent permitted by law and permit it to make other indemnification arrangements and agreements;

WHEREAS, the Company desires to provide Indemnitee with specific contractual assurance of Indemnitee’s rights to full indemnification against litigation risks and expenses (regardless, among other things, of any amendment to or revocation of the By-laws or any change in the ownership of the Company or the composition of its Board of Directors);

WHEREAS, the Company intends that this Agreement provide Indemnitee with greater protection than that which is provided by the By-laws; and

WHEREAS, Indemnitee is relying upon the rights afforded under this Agreement in becoming a director of the Company.

NOW, THEREFORE, in consideration of the promises and the covenants contained herein, the Company and Indemnitee do hereby covenant and agree as follows:

1. Definitions .

• • • (a) "Corporate Status" describes the status of a person who is serving or has served (i) as an officer, employee, trustee or agent of the Company, (ii) in any capacity with respect to any employee benefit plan of the Company, or (iii) as a director, partner, trustee, officer, employee, or agent of any other Entity at the request of the Company. For purposes of subsection (iii) of this Section 1(a), if Indemnitee is serving or has served as a director, partner, trustee, officer, employee or agent of a Subsidiary, Indemnitee shall be deemed to be serving at the request of the Company.

• • • (b) "Entity" shall mean any corporation, partnership, limited liability company, joint venture, trust, foundation, association, organization or other legal entity.

      (c) "Expenses" shall mean all fees, costs and expenses incurred by Indemnitee in connection with any Proceeding (as defined below), including, without limitation, attorneys’ fees, disbursements and retainers (including, without limitation, any such fees, disbursements and retainers incurred by Indemnitee pursuant to Sections 10 and 11(c) of this Agreement), fees and disbursements of expert witnesses, private investigators and professional advisors (including, without limitation, accountants and investment bankers), court costs, transcript costs, fees of experts, travel expenses, duplicating, printing and binding costs, telephone and fax transmission charges, postage, delivery services, secretarial services, and other disbursements and expenses.

      (d) "Indemnifiable Expenses," "Indemnifiable Liabilities" and "Indemnifiable Amounts" shall have the meanings ascribed to those terms in Section 3(a) below.

      (e) "Liabilities" shall mean judgments, damages, liabilities, losses, penalties, excise taxes, fines and amounts paid in settlement.

      (f) "Proceeding" shall mean any threatened, pending or completed claim, action, suit, arbitration, alternate dispute resolution process, investigation, administrative hearing, appeal, or any other proceeding, whether civil, criminal, administrative, arbitrative or investigative, whether formal or informal, including a proceeding initiated by Indemnitee pursuant to Section 10 of this Agreement to enforce Indemnitee’s rights hereunder.

      (g) "Subsidiary" shall mean any corporation, partnership, limited liability company, joint venture, trust or other Entity of which the Company owns (either directly or through or together with another Subsidiary of the Company) either (i) a general partner, managing member or other similar interest or (ii) (A) 50% or more of the voting power of the voting capital equity interests of such corporation, partnership, limited liability company, joint venture or other Entity, or (B) 50% or more of the outstanding voting capital stock or other voting equity interests of such corporation, partnership, limited liability company, joint venture or other Entity.

2. Services of Indemnitee . In consideration of the Company’s covenants and commitments hereunder, Indemnitee agrees to serve or continue to serve as an officer of the Company. However, this Agreement shall not impose any obligation on Indemnitee or the Company to continue Indemnitee’s service to the Company beyond any period otherwise required by law or by other agreements or commitments of the parties, if any.

3. Agreement to Indemnify . The Company agrees to indemnify Indemnitee as follows:

• • • (a) Proceedings Other Than By or In the Right of the Company . Subject to the exceptions contained in Section 4(a) below, if Indemnitee was or is a party or is threatened to be made a party to any Proceeding (other than an action by or in the right of the Company) by reason of Indemnitee’s Corporate Status, Indemnitee shall be indemnified by the Company against all Expenses and Liabilities incurred or paid by Indemnitee in connection with such Proceeding (referred to herein as "Indemnifiable Expenses" and "Indemnifiable Liabilities," respectively, and collectively as "Indemnifiable Amounts").

      (b) Proceedings By or In the Right of the Company . Subject to the exceptions contained in Section 4(b) below, if Indemnitee was or is a party or is threatened to be made a party to any Proceeding by or in the right of the Company by reason of Indemnitee’s Corporate Status, Indemnitee shall be indemnified by the Company against all Indemnifiable Expenses.

      (c) Expenses as a Witness . To the extent that Indemnitee is, by reason of his or her Corporate Status, a witness in any Proceeding to which Indemnitee is not a party and is not threatened to be made a party, Indemnitee shall be indemnified by the Company against all Expenses incurred or paid by Indemnitee in connection therewith, which Expenses shall be considered Indemnifiable Expenses for purposes of this Agreement.

      (d) Conclusive Presumption Regarding Standard of Care . In making any determination required to be made under Delaware law with respect to entitlement to indemnification hereunder, the person, persons or entity making such determination shall presume that Indemnitee is entitled to indemnification under this Agreement if Indemnitee submitted a request therefor in accordance with Section 5 of this Agreement, and the Company shall have the burden of proof to overcome that presumption in connection with the making by any person, persons or entity of any determination contrary to that presumption.

4. Exceptions to Indemnification . Indemnitee shall be entitled to indemnification under Sections 3(a) and 3(b) above in all circumstances other than with respect to any specific claim, issue or matter involved in the Proceeding out of which Indemnitee’s claim for indemnification has arisen, as follows:

• • • (a) Proceedings Other Than By or In the Right of the Company . If indemnification is requested under Section 3(a) and it has been finally adjudicated by a court of competent jurisdiction that, in connection with such specific claim, issue or matter, Indemnitee failed to act (i) in good faith and (ii) in a manner Indemnitee reasonably believed to be in or not opposed to the best interests of the Company, or, with respect to any criminal Proceeding, Indemnitee had reasonable cause to believe that Indemnitee’s conduct was unlawful, Indemnitee shall not be entitled to payment of Indemnifiable Amounts hereunder.

• • • (b) Proceedings By or In the Right of the Company . If indemnification is requested under Section 3(b) and

      • (i) it has been finally adjudicated by a court of competent jurisdiction that, in connection with such specific claim, issue or matter, Indemnitee failed to act (A) in good faith and (B) in a manner Indemnitee reasonably believed to be in or not opposed to the best interests of the Company, Indemnitee shall not be entitled to payment of Indemnifiable Expenses hereunder; or

        (ii) it has been finally adjudicated by a court of competent jurisdiction that Indemnitee is liable to the Company with respect to such specific claim, Indemnitee shall not be entitled to payment of Indemnifiable Expenses hereunder with respect to such claim, issue or matter unless the Court of Chancery or another court in which such Proceeding was brought shall determine upon application that, despite the adjudication of liability, but in view of all the circumstances of the case, Indemnitee is fairly and reasonably entitled to indemnification for such Indemnifiable Expenses which such court shall deem proper; or

        (iii) it has been finally adjudicated by a court of competent jurisdiction that Indemnitee is liable to the Company for an accounting of profits made from the purchase or sale by the Indemnitee of securities of the Company pursuant to the provisions of Section 16(b) of the Securities Exchange Act of 1934, the rules and regulations promulgated thereunder and amendments thereto or similar provisions of any federal, state or local statutory law, Indemnitee shall not be entitled to payment of Indemnifiable Expenses hereunder.

      (c) Insurance Proceeds . To the extent payment is actually made to the Indemnitee under a valid and collectible insurance policy in respect of Indemnifiable Amounts in connection with such specific claim, issue or matter, Indemnitee shall not be entitled to payment of Indemnifiable Amounts hereunder except in respect of any excess beyond the amount of payment under such insurance.

5. Procedure for Payment of Indemnifiable Amounts . Indemnitee shall submit to the Company a written request specifying the Indemnifiable Amounts for which Indemnitee seeks payment under Section 3 of this Agreement and the basis for the claim. The Company shall pay such Indemnifiable Amounts to Indemnitee promptly upon receipt of its request. At the request of the Company, Indemnitee shall furnish such documentation and information as are reasonably available to Indemnitee and necessary to establish that Indemnitee is entitled to indemnification hereunder.

6. Indemnification for Expenses of a Party Who is Wholly or Partly Successful . Notwithstanding any other provision of this Agreement, and without limiting any such provision, to the extent that Indemnitee is, by reason of Indemnitee’s Corporate Status, a party to and is successful, on the merits or otherwise, in any Proceeding, Indemnitee shall be indemnified against all Expenses reasonably incurred by Indemnitee or on Indemnitee’s behalf in connection therewith. If Indemnitee is not wholly successful in such Proceeding but is successful, on the merits or otherwise, as to one or more but less than all claims, issues or matters in such Proceeding, the Company shall indemnify Indemnitee against all Expenses reasonably incurred by Indemnitee or on Indemnitee’s behalf in connection with each successfully resolved claim, issue or matter. For purposes of this Agreement, the termination of any claim, issue or matter in such a Proceeding by withdrawal or dismissal, with or without prejudice, shall be deemed to be a successful result as to such claim, issue or matter.

7. Effect of Certa