Document:

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                                                                    EXHIBIT 10.8

                               NETEZZA CORPORATION

                       Nonstatutory Stock Option Agreement
                     Granted Under 2007 Stock Incentive Plan

1. Grant of Option.

     This agreement evidences the grant by Netezza Corporation, a Delaware
corporation (the "Company"), on __________, 200_ (the "Grant Date") to
_____________, a director of the Company (the "Participant"), of an option to
purchase, in whole or in part, on the terms provided herein and in the Company's
2007 Stock Incentive Plan (the "Plan"), a total of 50,000 shares (the "Shares")
of common stock, $.001 par value per share, of the Company ("Common Stock") at
an exercise price of $______ per Share. Unless earlier terminated, this option
shall expire at 5:00 p.m., Eastern time, on the seventh anniversary of the Grant
Date (the "Final Exercise Date").

     It is intended that the option evidenced by this agreement shall not be an
incentive stock option as defined in Section 422 of the Internal Revenue Code of
1986, as amended and any regulations promulgated thereunder (the "Code"). Except
as otherwise indicated by the context, the term "Participant," as used in this
option, shall be deemed to include any person who acquires the right to exercise
this option validly under its terms.

2. Vesting Schedule.

     This option will become exercisable ("vest") as to 25% of the original
number of Shares on _______________ [first anniversary of the Grant Date] and as
to an additional 6.25% of the original number of Shares at the end of each
successive three-month period following _______________ [first anniversary of
the Grant Date] until _______________ [fourth anniversary of the Grant Date].

     The right of exercise shall be cumulative so that to the extent the option
is not exercised in any period to the maximum extent permissible it shall
continue to be exercisable, in whole or in part, with respect to all Shares for
which it is vested until the earlier of the Final Exercise Date or the
termination of this option under Section 4 hereof or the Plan.

3. Acceleration of Vesting Schedule.

     Notwithstanding the vesting schedule described above in Section 2,
effective immediately prior to an Acquisition (as defined below), all unvested
Shares shall become vested in full. For purposes of this option, the term
"Acquisition" shall mean (a) any merger or consolidation in which (i) the
Company is a constituent party or (ii) a subsidiary of the Company is a
constituent party and the Company issues shares of its capital stock pursuant to
such merger or consolidation (except, in the case of both clauses (i) and (ii)
above, any such merger or consolidation involving the Company or a subsidiary in
which the holders of capital stock of the Company immediately prior to such
merger or consolidation continue to hold immediately following such merger or
consolidation at least 51% by voting power of the capital stock of (x) the
surviving or resulting corporation or (y) if the surviving or resulting
corporation is a wholly owned subsidiary of another corporation immediately
following such merger or consolidation, of

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the parent corporation of such surviving or resulting corporation) or (b) the
sale or transfer, in a single transaction or series of related transactions, of
outstanding capital stock representing at least 51% of the voting power of the
outstanding capital stock of the Company immediately following such transaction
or (c) the sale of all or substantially all of the assets of the Company.

4. Exercise of Option.

     (a) Form of Exercise. Each election to exercise this option shall be in
substantially the form attached hereto as Exhibit A, signed by the Participant,
and received by the Company at its principal office, accompanied by this
agreement, and payment in full in the manner provided in the Plan. The
Participant may purchase less than the number of shares covered hereby, provided
that no partial exercise of this option may be for any fractional share or for
fewer than ten whole shares.

     (b) Termination of Director Status. If the Participant ceases to be a
director of the Company for any reason, then, except as provided in paragraph
(c) below, the right to exercise this option shall terminate three months after
such cessation (but in no event after the Final Exercise Date), provided that
this option shall be exercisable only to the extent that the Participant was
entitled to exercise this option on the date of such cessation.

     (c) Exercise Period Upon Death or Disability. If the Participant dies or
becomes disabled (within the meaning of Section 22(e)(3) of the Code) prior to
the Final Exercise Date while he or she is a director of the Company, this
option shall be exercisable, within the period of one year following the date of
death or disability of the Participant, by the Participant (or in the case of
death by an authorized transferee), provided that this option shall be
exercisable only to the extent that this option was exercisable by the
Participant on the date of his or her death or disability, and further provided
that this option shall not be exercisable after the Final Exercise Date.

5. Withholding.

     No Shares will be issued pursuant to the exercise of this option unless and
until the Participant pays to the Company, or makes provision satisfactory to
the Company for payment of, any federal, state or local withholding taxes
required by law to be withheld in respect of this option.

6. Nontransferability of Option.

     This option may not be sold, assigned, transferred, pledged or otherwise
encumbered by the Participant, either voluntarily or by operation of law, except
by will or the laws of descent and distribution, and, during the lifetime of the
Participant, this option shall be exercisable only by the Participant.

7. Provisions of the Plan.

     This option is subject to the provisions of the Plan (including the
provisions relating to amendments to the Plan), a copy of which is furnished to
the Participant with this option.

                                       -2-

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     IN WITNESS WHEREOF, the Company has caused this option to be executed under
its corporate seal by its duly authorized officer.

                                        NETEZZA CORPORATION

                                        By:
                                            ------------------------------------
                                        Name: Jitendra Saxena
                                        Title: Chief Executive Officer

                                       -3-

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                            PARTICIPANT'S ACCEPTANCE

     The undersigned hereby accepts the foregoing option and agrees to the terms
and conditions thereof. The undersigned hereby acknowledges receipt of a copy of
the Company's 2007 Stock Incentive Plan.

                                        PARTICIPANT:

                                        ----------------------------------------

                                       -4-
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                                                                       EXHIBIT A

                  NOTICE OF NONSTATUTORY STOCK OPTION EXERCISE

                         Date of Exercise: ____________

NETEZZA CORPORATION
200 Crossing Boulevard
Framingham, MA 01702

Attention:  Treasurer

Dear Sir or Madam:

I am the holder of a Nonstatutory Stock Option granted to me under the Netezza
Corporation (the "Company") 2007 Stock Incentive Plan on ____________, 200_ for
the purchase of 50,000 shares of Common Stock of the Company at a purchase price
of $_____ per share.

I hereby exercise my option to purchase _________ shares of Common Stock (the
"Shares"), for which I have enclosed a check in the amount of $________. Please
register my stock certificate as follows:

     Name(s):         _____________________________

     Address:         _____________________________

                      _____________________________
     Tax I.D./ SSN #:
                      _____________________________

Very truly yours,

-------------------------------------

                                       -5-<PAGE>

                                                                    EXHIBIT 10.1

                Guarantee and Undertaking of Evergreen Solar Inc.

     Evergreen Solar, Inc.
     Deutsche Bank AG Branch German Business, in its capacity as Security Agent,
     Deutsche Bank Luxembourg S.A.
     Bayerische Hypo- und Vereinsbank AG
     HVB Banque Luxembourg Societe Anonyme
     IKB Deutsche Industriebank AG
     NORD/LB Norddeutsche Landesbank Girozentrale Mitteldeutsche Landesbank
     BNP Banque Paribas
     EverQ GmbH

agree as follows:

                            GUARANTEE AND UNDERTAKING

All terms set in italics in this Guarantee and Undertaking have the same meaning
as the terms set opposite to them in the table attached as Annex 1, which in
turn have the meaning defined in the syndicated loan agreement dated [date]
regarding a syndicated loan in the amount of EUR 142,000,000.00 granted to EverQ
GmbH (Loan Agreement). The Loan Agreement including schedules is known to
Evergreen Solar, Inc. ("Guarantor") in its entirety. Terms defined in this
Guarantee and Undertaking ("Guarantee and Undertaking") have the meaning defined
herein and are not set in italics.

However, the Guarantor is not a party to the Loan Agreement and the latter does
not constitute a legally binding document for the Guarantor even where the
wording of the Loan Agreement might suggest otherwise. Rather, the legal
relationship between the Guarantor on the one side and the Financing Parties and
the Borrower on the other side is exclusively governed by this Guarantee and
Undertaking regarding the issuance of the aforementioned loan to the Borrower.

                               SECTION A GUARANTEE

PREAMBLE

By way of the Loan Agreement, the Banks have agreed, subject to certain
conditions, to grant to the Borrower loans or other forms of financing up to an
amount of EUR 142,000,000.00 against the Guarantor's issuance of a guarantee in
relation to Tranche A payable upon first demand. Correspondingly, the Guarantor
issues this guarantee

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Evergreen Solar, Inc.

("Guarantee") in relation to Tranche A to ensure that the Security Agent
receives payment of all amounts payable by the Borrower pursuant to the wording
of the Loan Agreement in relation to Tranche A in the currency and at the place
provided for by the Loan Agreement, at its stated or accelerated maturity (the
"Indebtedness") net of any deduction or withholding whatsoever and irrespective
of the factual or legal circumstances (including, but not limited to, force
majeure or any event or action delaying or preventing any conversion or transfer
to or receipt by the Security Agent in the account agreed to by it) and motives
by reason of which the Borrower may fail to pay the Indebtedness.

(1)  GUARANTEE AND GUARANTEED AMOUNT

The Guarantor hereby irrevocably and unconditionally guarantees the payment to
the Security Agent, in Magdeburg and in effective EUR, of the Indebtedness up to

                EUR 30,000,000.00 (in words: Thirty Million Euro)

including interest, cost, expenses, fees and all other amounts as agreed upon to
be payable by the Borrower. Payment hereunder will be made in Magdeburg and in
effective EUR without any deduction or withholding whatsoever. To the extent the
Security Agent should assert payments in an aggregate amount of less than EUR
90,000,000.00 from the Guarantor and Q-Cells AG and Renewable Energy Corporation
ASA ("Further Guarantors"), the Guarantor is only obliged against the Security
Agent to a payment of a portion in the amount of 33.33 %. Upon fulfilment,
release or expiration of this Guarantee, Banks are obliged to return the
original of this Guarantee to the Guarantor without undue delay, unless a risk
of an insolvency challenge ["Insolvenzanfechtung"] exists.

(2)  PAYMENT UPON FIRST DEMAND

The Guarantor shall effect payment under this Guarantee immediately upon the
Security Agent's first demand and confirmation in writing or by
teletransmission, provided that the Borrower is in default under the terms and
conditions of the Loan Agreement which has not been sufficiently cured within
the time frames analogous Section 17 section (1) sentences 3 and 4 of the Loan
Agreement,

(a)  that the amount claimed from the Guarantor equals 33.33 % of the
     Indebtedness (or part thereof) which the Borrower has not paid when due
     after expiration of an applicable cure period, if any, and

                                                            (DEUTSCHE BANK LOGO)

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(b)  that the Security Agent simultaneously has asserted claims against the
     Further Guarantors in the same amount under the respective Guarantee and
     Undertaking. This does not apply if the Guarantee of the Shareholder-3,
     which is limited in time until 30 June 2008 will not have been extended
     prior to 31 May 2008 until 31 October 2010 or will have been released prior
     to 31 May 2008, a Mandatory Prepayment of the Shareholder-3 will not have
     been effected until 15 June 2008 and the Banks will require payment under
     the Guarantee of the Shareholder-3.

(3)  PRIMARY, INDEPENDENT OBLIGATION

This Guarantee constitutes the Guarantor's independent obligation to make
payment to the Security Agent in accordance with the terms of this Guarantee,
under any and all circumstances, regardless of the validity, legality or
enforceability of the Loan Agreement and irrespective of all objections,
exceptions or defences from the Borrower or third parties.

(4)  GUARANTEE FOR PAYMENT

The Security Agent shall not be required first to claim payment from, to proceed
against, or enforce any claims against or security given by, the Borrower or any
other person before making demand from the Guarantor under this Guarantee.

(5)  EXCLUSION OF SPECIFIC DEFENCES

This Guarantee and the Guarantor's obligations hereunder shall not be contingent
upon the legal relationship between the Security Agent and the Borrower and
shall particularly be independent of and enforceable notwithstanding

(a)  invalidity of the Loan Agreement,

(b)  any absence or insufficiency of corporate resolutions relating to the
     Indebtedness,

(c)  any inadequate representation of the Borrower,

(d)  any absence of licences or other authorisations or any factual or legal
     restrictions or limitations existing or introduced in the country of the
     Borrower (including, but not limited to, force majeure or any event or
     action delaying or preventing any conversion or transfer to or receipt by
     the Security Agent in the account agreed to by the Security Agent),

(e)  any agreement made between the Security Agent and the Borrower concerning
     the Indebtedness, including any extension of the term of payment and any
     rescheduling or

                                                            (DEUTSCHE BANK LOGO)

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Page 4 from 24 of the Guarantee and Undertaking dated 27 April 2007 from
Evergreen Solar, Inc.

     restructuring, even if the Guarantor did not give its consent thereto
     unless such consent is required pursuant to subsections (10) or (11) below,

(f)  the taking, existence, variation or release of any other collateral
     provided to the Security Agent for the Indebtedness, and the Security
     Agent's legal relationship with any provider of such other collateral,

(g)  any right of the Borrower to challenge the Loan Agreement,

(h)  any right that the Security Agent may have to set-off the Indebtedness
     against a counterclaim of the Borrower,

(i)  one or two of the Further Guarantors have not made payments upon the
     Security Agent's assertion of claims, and

(j)  one or two of the Further Guarantors have raised defences upon the Security
     Agent's assertion of claims.

(6)  TAXES

To the extent legally possible, any amount payable by the Guarantor under this
Guarantee will be paid free and clear of any reduction and without deduction of
any withholding taxes. Withholding taxes are taxes, duties or governmental
charges of any kind whatsoever which are imposed or levied in, by or on behalf
of the country in which the Guarantor or the Borrower is situated, and which are
deducted from any payment hereunder or under the Loan Agreement. If the
deduction of withholding taxes is required by law, then the Guarantor shall pay
such additional amounts as may be necessary in order that the net amounts
received by the Security Agent after such deduction shall equal the amount that
would have been receivable had no such deduction been required safe to the
extent the Banks are entitled to repayment of the withholding tax by the
competent tax authority or to have such withholding tax set-off against their
tax liabilities.

In the event of an imminent or actual withholding, the Security Agent shall, at
the Guarantor's request, provide such documents and information as may be
necessary or useful for the Guarantor to obtain an exemption from such
withholding ["Freistellung"] or to claim back from the respective tax
authorities ["Erstattung"] withholdings which have been deducted.

(7)  CURRENCY INDEMNITY

Payments made by the Guarantor to the Security Agent pursuant to a judgement or
order of a court or tribunal in a currency other than that of the Guarantee (the
"Guarantee Currency")

                                                            (DEUTSCHE BANK LOGO)

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Page 5 from 24 of the Guarantee and Undertaking dated 27 April 2007 from
Evergreen Solar, Inc.

shall constitute a discharge of the Guarantor's obligation hereunder only to the
extent of the amount of the Guarantee Currency that the Security Agent,
immediately after receipt of such payment in such other currency, would be able
to purchase with the amount so received on a recognised foreign exchange market.
If the amount so received should be less than the amount due in the Guarantee
Currency under this Guarantee, then as a separate and independent obligation,
which gives rise to a separate cause of action, the Guarantor is obliged to pay
the difference.

(8)  SUBROGATION; LIMITATION OF SUBROGATION

(a)  In the event the Guarantor makes any payment hereunder, each of the Banks
     hereby assigns its claims against the Borrower under the Loan Agreement in
     the amount of the payment received (directly or through the Security Agent)
     from the Guarantor; section 774 para (1) sentence 1 of the German Civil
     Code (BGB) shall apply analogous.

(b)  The Guarantor undertakes not to assert any claim it may have against the
     Borrower by reason of the performance of its obligations under this
     Guarantee, whether on contractual grounds or on any other legal basis,
     until the Indebtedness has been fully satisfied and all amounts payable to
     the Security Agent under the Loan Agreement have been fully and irrevocably
     received or recovered.

(c)  Any amount received or recovered by the Guarantor from the Borrower shall
     be held in trust for and immediately paid to the Security Agent. Subsection
     (a) shall apply analogous.

(9)  DISSOLUTION/CHANGE OF STRUCTURE

The obligations under this Guarantee shall remain in force notwithstanding any
dissolution or change in the structure or legal form of the Borrower.

(10) RESTRUCTURING

Subject to the Guarantor's written consent, the Security Agent shall be entitled
to reschedule or restructure principal, interest and other Indebtedness, to
release the Borrower from its Indebtedness and/or to accept a new debtor if, for
reasons which the Security Agent deems important, the Security Agent or other
companies of the Deutsche Bank group agree to similar measures also with respect
to other loans extended to individuals and/or entities in the country of the
Borrower. The Guarantor's liability under this Guarantee shall not be

                                                            (DEUTSCHE BANK LOGO)

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affected by such measures, and the Guarantor undertakes to pay to the Security
Agent upon first demand, in accordance with the terms hereof, all such amounts
in full at such time as they would have become due and payable had the Loan
Agreement and the Indebtedness remained effective without alteration. The
Guarantor's written consent to the terms and documentation of such rescheduling,
restructuring, release or debt assumption shall be required.

(11) NEW MONEY

Should the Security Agent, subject to the Guarantor's written consent, agree, in
connection with a debt restructuring or in order to avoid such restructuring, to
extend new credits ("New Money") to the Borrower or other individuals and/or
entities of the public or private sector in the country of the Borrower and
should the Security Agent's participation in such New Money be calculated on the
basis of loans extended by the Security Agent and/or other companies of the
Deutsche Bank group to the Borrower or such other individuals and/or entities,
the Guarantor hereby irrevocably and unconditionally guarantees, in accordance
with the terms hereof, that portion of the claims for principal, interest, cost,
expenses, fees and other amounts payable in respect of the New Money by which
the Security Agent's participation in the New Money is increased by virtue of
the Indebtedness, regardless of whether the Security Agent is legally obliged to
take part in the restructuring or the New Money. The Guarantor's written consent
to the terms and documentation of the New Money shall be required.

(12) MISCELLANEOUS

The Guarantor represents and warrants that this Guarantee is binding, valid and
enforceable against it in accordance with its terms. The Guarantor confirms that
it has taken, and will continue to take all necessary steps to ensure that any
amount claimed by the Security Agent from it hereunder can be transferred
immediately, free of any deduction, cost or charges whatsoever. The Security
Agent is only obliged to provide the Guarantor with information regarding the
banking business relationship to the Borrower, the Loan Agreement and the
Indebtedness if

(a)  the Guarantor has submitted preliminary proof ("Glaubhaftmachung") to the
     Security Agent that it has asked for this information at the Borrower
     without success and

(b)  this information is - in Guarantor's reasonable opinion - required by the
     Guarantor.

                                                            (DEUTSCHE BANK LOGO)

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Page 7 from 24 of the Guarantee and Undertaking dated 27 April 2007 from
Evergreen Solar, Inc.

In any case, however, the Guarantor's payment obligation is not dependent on
such an obligation to provide information.

(13) TERM

This Guarantee is effective as of its date of issuance and expires on 31 October
2010 - unless released earlier or extended pursuant to Section A Clause (14) -
if:

(a)  the Indebtedness has been fully and irrevocably received by the Banks and

(b)  no concrete risk of an insolveny contestation exists.

(14) RELEASE OF THE GUARANTEE

The Security Agent shall release the Guarantee with consent of the Banks if

(a)  the date of Completion of EverQ2 has expired and

(b)  the Banks have received the Borrower's 2007 audited annual financial
     statements and

(c)  the Banks have received the quarterly report with the Review for the first
     quarter of 2008 or - if such report does not yet exist - the most recent
     monthly report and

(d)  the Banks have received the updated Business Plan or a confirmation from
     the Borrower, that such an update has not been made and

(e)  based on the documents listed in (b) to (d) above as applicable the
     Borrower's projected business progress (including the timely Completion of
     EverQ2) in accordance with the Business Plan can be documented or
     anticipated and

(f)  the land charge according Schedule 6 no. 1 of the Loan Agreement has been
     registered.

                              SECTION B UNDERTAKING

SECTION 1 GUARANTEE BACK-UP SECURITY

(1)  Unless the term of our Guarantee as defined in Section A subsection (13)
     has expired or unless there has been a release of the Guarantee pursuant to
     Section A subsection (14), the Guarantor shall provide the Guarantee
     Back-Up Security to the Banks.

(2)  The Security Agent shall release the Guarantee Back-up Security-1 with
     consent of the Banks after the expiration of 31 May 2007, if the conditions
     under (i) to (iii) have been

                                                            (DEUTSCHE BANK LOGO)

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Page 8 from 24 of the Guarantee and Undertaking dated 27 April 2007 from
Evergreen Solar, Inc.

     satisfied cumulative and, in addition, one of the conditions under (iv) or
     (v) has been satisfied alternatively:

(i)  The date of Completion of EverQ2 has expired.

(ii) The Borrower has complied with the Business Plan.

(iii) The land charge according to Schedule 6 no. 1 (Sicherheitenvertrage) of
     the Loan Agreement has been registered.

(iv) After the capital increase of Guarantor planned for the first half-year of
     2007, Guarantor maintains, and can verify at any time, the amount of EUR
     40,000,000.00 as a cash balance or in the form of another secure risk-free
     [risikofreien] investment (such as fixed term deposits or money market
     funds) which must be capable of liquidation within 2 Bank Business Days,
     and has pledged to the Banks a first-priority partial amount thereof in the
     amount of EUR 15,000,000.00. These obligations (Guarantee Back-up
     Security-2) cease to exist with the release of the Guarantees.

(v)  The amount of Tranche A is finally reduced in the amount of the Guarantee
     Back-up Security.

SECTION 2 SECURITY SHORTFALL

If, at the time of the release of the Guarantee, the value of the collateral
described in Schedule 6 no. 1 of the Loan Agreement as according to the
valuation of the Security Agent and the collateral described in Schedule 6 no. 2
of the Loan Agreement according to the Valuation Opinion and the collateral
described in Schedule 6 no. 10 of the Loan Agreement together is less than the
Loan Commitments of all Banks under Tranches A and C, less any final repayments
made and ultimately remaining with the Banks toward such loans ("Security
Shortfall"), then the Borrower and the Banks shall agree as to one or more of
the following - at least in the amount of the Security Shortfall:

(a)  Obligatory special payment of principal by the Borrower,

(b)  Increase of the positive balance on the Debt Service Reserve Account.

To the extent the Security Shortfall cannot be covered by these measures, the
parties hereto shall agree on an extension of the term of this Guarantee and
Undertaking, provided, however, that the Guarantees and Undertakings issued by
the Further Guarantors are extended correspondingly. As long as a solution to
the extension of this Guarantee and Undertaking is not found, the Guarantee and

                                                            (DEUTSCHE BANK LOGO)

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Page 9 from 24 of the Guarantee and Undertaking dated 27 April 2007 from
Evergreen Solar, Inc.

Undertaking remains effective in the amount of 33,33 % of the Security
Shortfall.

SECTION 3 SUBORDINATION OF CLAIMS OF SHAREHOLDERS

(1)  The Guarantor subordinates all of its current and future claims against the
     Borrower, and all of the rights appertaining thereto, with the exception of
     trade receivables and the claims on interest out of its shareholder loans
     that may not bear significantly higher interest than Tranche C, to all of
     the current and future claims of the Banks (including all of their domestic
     and foreign branches) against the Borrower under the Financing Documents,
     irrespective of the legal form of the Borrower at such time and
     irrespective of the identity of its shareholders. As long as the Banks have
     not been fully satisfied in respect of the aforementioned claims when due
     and payable, the Guarantor will not dispose of its claims subordinated in
     accordance with this subsection without the prior written consent of the
     Banks and, in particular, will not collect on them, secure them, assign
     them to third parties, pledge them or set them off. At the same time, the
     Guarantor warrants that it has not disposed of the claims prior to today,
     so that no third party rights exist with respect to such claims.

(2)  The Guarantor subordinates all of its current and future trade receivables
     and all of the rights against the Borrower appertaining thereto as well as
     the claims on interest out of its shareholder loans that may not bear
     significantly higher interest than Tranche C to all of the claims of the
     Banks (including all of their domestic and foreign branches) against the
     Borrower under the Financing Documents that have or will have fallen due,
     irrespective of the legal form of the Borrower at such time and
     irrespective of the identity of its Shareholders. As long as the Banks have
     not been fully satisfied in respect of the aforementioned claims when due
     and payable, the Guarantor will not dispose of its claims subordinated in
     accordance with this subsection without the prior written consent of the
     Banks and, in particular, will not collect on them, secure them, assign
     them to third parties, pledge them or set them off. At the same time, the
     Guarantor warrants that it has not disposed of the claims prior to today,
     so that no third party rights exist with respect to such claims.

(3)  This subordination shall remain valid until it is rescinded by written
     mutual agreement. The Banks shall consent to the rescission if the Borrower
     has fulfilled or secured all of its obligations to them under the Financing
     Documents. The Banks have the right to

                                                            (DEUTSCHE BANK LOGO)

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Page 10 from 24 of the Guarantee and Undertaking dated 27 April 2007 from
Evergreen Solar, Inc.

     grant their consent subject to the condition subsequent that the Banks are
     required to return the amounts that have been paid to them (especially in
     the case of impending challenge during insolvency proceedings).

SECTION 4 REPRESENTATIONS AND WARRANTIES

By concluding this Guarantee and Undertaking, the Guarantor represents and
warrants to the Banks that

(a)  within the framework of the current version of the Master Joint Venture
     Agreement and the respective License and Technology Transfer Agreement
     executed by the Guarantor, the Borrower will receive unlimited use of all
     of the licenses and other rights of use, as well as the necessary process
     expertise, necessary to satisfy the Business Plan, to the extent the
     Guarantor owns such rights;

(b)  no judicial or extrajudicial legal proceedings exist with respect to the
     licenses and other rights of use referred to in subparagraph (a) that could
     threaten the Borrower's rights out of the licenses or the rights of use;

(c)  all agreements between the Borrower and the Guarantor have been concluded,
     and are being performed, on the basis of terms that are at arm's length;

(d)  if it expands production capacity, grants licenses or other rights of use
     to third parties - or acquires shares of companies - that compete with the
     Borrower using comparable technology to its own technology it shall, to the
     extent feasible, grant to the Borrower within the framework of the current
     versions of the Master Joint Venture Agreement and of the respective
     License and Technology Transfer Agreement access to the use of the
     respective technology at least equivalent to its own access and on at least
     the same (or more favorable) terms.

The aforementioned Representations and Warranties shall apply as having been
repeated by the Guarantor with every Notice of Drawing, on each drawing date and
on the first day of each Interest Period.

SECTION 5 CONCLUSION OF INTER-COMPANY AGREEMENTS

The Guarantor covenants, in respect to the Borrower, not to enter into any
control, profit transfer or other inter-company agreements within the meaning of
sec. 291 and 292 of the

                                                            (DEUTSCHE BANK LOGO)

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German Stock Corporation Act (Aktiengesetz), or to execute transformations
within the meaning of the German Act on Business Transformations
(Umwandlungsgesetz) or comparable transactions without the prior written consent
of the Banks.

SECTION 6 EXPANSION MEASURES

The Borrower and the Guarantor shall offer the Banks the option of financing the
Expansion Measures in preference to all other financing providers. However, no
prejudice to a favourable financing decision may be derived therefrom.

If the Banks' review does not lead to a favourable financing decision, then the
Banks consent to the Expansion Measures already by executing the Loan Agreement
subject to the fulfilment of one of the following conditions:

(i)  The Borrower and the Shareholders are implementing the Expansion Measures
     via a subsidiary or affiliate on a stand-alone basis, i.e. without any
     financial or non-financial recourse whatsoever to the Borrower, it being
     understood that the Shareholders must grant to the Borrower at least the
     same terms and conditions as to such subsidiary or affiliate to the extent
     services rendered, goods delivered or rights granted to such subsidiary or
     affiliate are also rendered, delivered or granted under the Project
     Contracts, or

(ii) the Guarantees of the Shareholders shall not be released until such time
     and to the extent as all obligations under the Loan Agreement have not been
     completely performed or - where such release has already taken place - the
     Guarantees of the Shareholders shall be renewed until such time and to the
     extent as all obligations of the Borrower under the Loan Agreement have
     been completely performed.

SECTION 7 FURTHER OBLIGATIONS

(1)  Jointly with the Further Guarantors, the Guarantor has contributed equity
     capital to the Borrower in the amount of EUR 43,100,000.00 and has granted
     the Borrower shareholder loans (subordinate to the claims of the Banks
     under the Loan Agreement in accordance with Section B Section 3 subsections
     (1) and (2) above) in the amount of at least EUR 90,000,000.00 prior to the
     first Drawing under the Loan Agreement.

(2)  Until the full repayment of all amounts payable by the Borrower under the
     Loan Agreement, the Guarantor covenants

                                                            (DEUTSCHE BANK LOGO)

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Page 12 from 24 of the Guarantee and Undertaking dated 27 April 2007 from
Evergreen Solar, Inc.

     (i)  to grant additional equity capital or additional loans (subordinated
          in accordance with Section B Section 3 subsections (1) and (2) above
          to claims of the Banks under the Loan Agreement), in the amount of
          33.33 % of that amount by which the investment costs for EverQ2 exceed
          the investment costs projected in the Business Plan or investment
          grants or investment subsidies are not granted in the projected amount
          or are required to be repaid,

     (ii) to promote the Borrower's operations on the basis of the Project
          Contracts,

     (iii) as long as it is listed on a stock exchange: to provide the Agent for
          the Banks with all publications regarding its financial situation, as
          it now or in future provides to the capital market, until such date
          when all claims of the Banks under the Loan Agreement have been
          fulfilled; upon demand, the banks will be provided with copies thereof
          if a justified interest in such information exists,

     (ii) if it is no longer listed on a stock exchange: to provide the Agent
          for the Banks with its quarterly figures within 60 days after expiry
          of the first, second and third quarter of each financial year and with
          its financial statements (annual accounts including profit and loss
          statement, annex and management report) reviewed and audited by
          independent chartered accountants within 120 days after expiry of each
          financial year.

(3)  Upon demand, the Guarantor will reimburse the Agent, the Security Agent and
     the other Financing Parties all such reasonable and necessary external
     costs as the latter have incurred in connection with the judicial or
     extrajudicial preservation or enforcement of their rights against the
     Guarantor.

(4)  The Guarantor covenants not to entirely or partially assign or transfer its
     rights and obligations under this Guarantee and Undertaking.

(5)  Without limiting the right of the Agent agreed in Section 17 subsection 1
     (Causes for termination) first sentence of the Loan Agreement to terminate
     or to claim the repayment, together with the Borrower and the Banks the
     Guarantor will undertake efforts to agree on alternatives where a Cause for
     termination has occurred or threatens to occur. In particular, Guarantor
     and Further Guarantors, each individually, always have the option to cure a
     Cause for termination analogous Section 17 section (1) (Causes for
     termination) sentences 3 and 4 of the Loan Agreement. Borrower and

                                                            (DEUTSCHE BANK LOGO)

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     Banks are obliged to notify Guarantor and Further Guarantors in writing
     about the occurrence of a Cause for termination immediately upon becoming
     aware of such occurrence and give them sufficient opportunity to cure such
     Cause for termination within the deadlines stipulated for the cure of a
     Cause for termination in Section  17 section (1) of the Loan Agreement. A
     violation of the aforementioned obligation to notify will not affect any of
     the rights of the Banks under the Financing Documents.

(6)  The Guarantor covenants not to receive dividends or distributions or
     comparable (direct or indirect) payments or benefits from the Borrower. If
     permitted to Commercial Law, such payments or performances are permitted
     from the year 2009 for the business year 2008, as far and as long as the
     Leverage Ratio goes below the value 1,5.

(7)  The Guarantor shall concurrently sign this Guarantee and Undertaking and
     the Addendum according Annex 2 to this Guarantee and Undertaking.

SECTION 8 MISCELLANEOUS

     Claims of the Financing Parties against the Guarantor are not affected by
     the agreements in Section 23 subsection (8) (Costs and expenses) of the
     Loan Agreement.

                             SECTION C MISCELLANEOUS

SECTION 1 PAYMENTS

(1)  Payment without deductions

All payments of the Guarantor under this Guarantee and Undertaking are payable
net, with no deductions of tax or similar charges whatsoever, irrespective of
the nature thereof, without any express demand made therefor, on the due date
(no later than 10 am local time). Section A subsection (6) shall remain
unaffected. Payment obligations shall only be deemed to have been satisfied with
the effect of discharging the obligation vis-a-vis the Bank or Banks if and to
the extent the relevant amounts are effectively paid in the currency in which
they are owed and in immediately disposable funds and have been credited,
without reservation, to the corresponding account designated by the Agent (or,
in the case of payment obligations under an Ancillary Facility, by the relevant
Ancillary Bank) at the main trading centre of the currency in question.

                                                            (DEUTSCHE BANK LOGO)

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Page 14 from 24 of the Guarantee and Undertaking dated 27 April 2007 from
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(2)  No set-off

The Guarantor is not entitled to set-off its own counterclaims against claims of
the Agent or of the Banks under the Loan Agreement or to assert a right of
retention. The waiver of the right to set-off and of retention does not apply to
the extent the counterclaims are undisputed or have been bindingly adjudicated.

(3)  Partial payments

Should the Guarantor make payments that are insufficient to satisfy liabilities
under this Guarantee and Undertaking which are in arrears or which are due, then
in the event of payments to the Agent, the Agent (in accordance with the ratios
of the Banks) or, in the case of payments made to an Ancillary Bank, the
Ancillary Bank in question shall apply these payments towards such payments as
are in arrears or due, in the following priority:

(a)  first - towards fees, commissions, costs and other expenses of the
     Arranger, the Agent or the Security Agent to be reimbursed;

(b)  second - towards interest claims which are due and have not been paid;

(c)  third - towards outstanding Drawings; and

(d)  fourth - towards all further claims which are due.

SECTION 2 NOTICES

(1)  Form

Unless otherwise provided in this Guarantee and Undertaking, all notices under
this Guarantee and Undertaking must be given by letter or facsimile.

(2)  Address

All notices to the Guarantor shall be directed to the address set forth in
Schedule 10 to the Loan Agreement or to such other address as the Guarantor has
timely indicated to the Agent.

                                                            (DEUTSCHE BANK LOGO)

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Page 15 from 24 of the Guarantee and Undertaking dated 27 April 2007 from
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SECTION 3 AMENDMENTS

No amendments to this Guarantee and Undertaking shall be valid unless made in
writing. The foregoing also applies to any amendment to or waiver of this
writing requirement.

SECTION 4 TRANSFER

Each Bank is entitled and obliged to assign or transfer, as the case may be, all
or part of its rights and duties under this Guarantee and Undertaking to another
credit institution or financial institution, provided, however, that such
assignment and transfer may only be effected jointly with the assignment and
transfer of all or the correspondig part of, as the case may be, the rights and
duties such Bank has under the Financing Documents.

SECTION 5 SEVERABILITY CLAUSE

Should any provisions of this Guarantee and Undertaking be or become invalid or
unenforceable, whether in whole or in part, then the remaining provisions hereof
shall remain unaffected thereby. The Parties hereby undertake to replace an
invalid or unenforceable provision with the valid and enforceable provision that
most closely reflects in commercial terms the purpose of the invalid or
unenforceable provision. An analogous rule shall apply in the case of
contractual gaps.

SECTION 6 NO WAIVER

A delay or a failure (including an only partial failure) to exercise rights on
the part of the Agent or the Banks shall not be deemed a waiver of those rights
and shall not give rise to a forfeiture of such rights.

SECTION 7 LANGUAGE

(1)  Notices

All notices given in connection with this Guarantee and Undertaking as well as
the Legal Opinions must be given in German or English.

(2)  Documents

Any other document submitted in connection with a Financing Document must:

                                                            (DEUTSCHE BANK LOGO)

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Page 16 from 24 of the Guarantee and Undertaking dated 27 April 2007 from
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(a)  be prepared in German or Englisch,

(b)  unless otherwise agreed with the Agent, be submitted together with a
     certified German translation. In such case the German translation shall
     take priority, except where the document in question is prescribed by law
     or is otherwise an official document.

SECTION 8 PRESCRIPTION

Any right and any claim of a Financing Party against the Guarantor arising in
connection with a Financing Document shall be prescribed after three years from
the date it falls due, except where the relevant statutory prescription period
is longer.

SECTION 9 TERM

In case of release or expiration of the Guarantee in accordance with Section A
subsections (13) and (14) the agreements of the Guarantee and Undertaking in
Section B and Section C shall remain in force. The term of the agreements in
Section B and Section C shall not expire until all claims of the Banks under the
Loan Agreement have been finally fulfilled.

SECTION 10 PREVIOUS COLLATERAL

The put-option agreement dated 9 November 2005 between the Guarantor, the
Borrower and Deutsche Bank AG relating to the loan agreement between the
Borrower and Deutsche Bank AG regarding EverQ1 is terminated, if the following
conditions are fulfilled:

(i)  The syndicated loan relating to EverQ1 dated 9 November 2005 will have been
     fully and definitely repaid. It is deemed to be agreed that there will take
     place a mandatory prepayment of the existing indebtedness amounting to EUR
     6,500,000.00 with the first disbursement under Tranche A.

(ii) Bayerische Hypo- und Vereinsbank AG has agreed to release the collateral
     including the put-option agreement provided in connection with the
     financing of EverQ1, without being obliged to do so.

Any termination of the put-option agreement on other legal grounds shall not be
affected hereby.

                                                            (DEUTSCHE BANK LOGO)

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Page 17 from 24 of the Guarantee and Undertaking dated 27 April 2007 from
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SECTION 11 APPLICABLE LAW, JURISDICTION

(1)  This Guarantee and Undertaking and all rights and obligations arising
     hereunder shall in all respects be governed by German law.

(2)  The Guarantor hereby submits to the jurisdiction of the competent courts of
     Frankfurt am Main. However, each Financing Party may sue the Guarantor
     before each other competent court. The Guarantor irrevocably waives any
     objection which it may now or hereafter have that such proceedings have to
     be brought in a more convenient forum.

Guarantor

Date:                                    EVERGREEN SOLAR, INC.
      -------------

                      (                       )   (                            )
                       -----------------------     ----------------------------

The Security Agent

Date:                          DEUTSCHE BANK AG, BRANCH GERMAN BUSINESS
      -------------

                      (                       )   (                            )
                       -----------------------     ----------------------------

                                                            (DEUTSCHE BANK LOGO)

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Page 18 from 24 of the Guarantee and Undertaking dated 27 April 2007 from
Evergreen Solar, Inc.

The Agent

Date:                                DEUTSCHE BANK LUXEMBOURG S.A.
      -------------

                      (                       )   (                            )
                       -----------------------     ----------------------------

The Banks

Date:                          DEUTSCHE BANK AG, BRANCH GERMAN BUSINESS
      -------------

                      (                       )   (                            )
                       -----------------------     ----------------------------

Date:                               DEUTSCHE BANK LUXEMBOURG S. A.
      -------------

                      (                       )   (                            )
                       -----------------------     ----------------------------

Date:                             BAYERISCHE HYPO- UND VEREINSBANK AG
      -------------

                      (                       )   (                            )
                       -----------------------     ----------------------------

                                                            (DEUTSCHE BANK LOGO)

<PAGE>

Page 19 from 24 of the Guarantee and Undertaking dated 27 April 2007 from
Evergreen Solar, Inc.

Date:                            HVB BANQUE LUXEMBOURG SOCIETE ANONYME
      -------------

                      (                       )   (                            )
                       -----------------------     ----------------------------

Date:                                IKB DEUTSCHE INDUSTRIEBANK AG
      -------------

                      (                       )   (                            )
                       -----------------------     ----------------------------

                             NORD/LB NORDDEUTSCHE LANDESBANK GIROZENTRALE
                                       MITTELDEUTSCHE LANDESBANK

                      (                       )   (                            )
                       -----------------------     ----------------------------

Date:                                     BNP BANQUE PARIBAS
      -------------

                      (                       )   (                            )
                       -----------------------     ----------------------------

                                                            (DEUTSCHE BANK LOGO)

<PAGE>

Page 20 from 24 of the Guarantee and Undertaking dated 27 April 2007 from
Evergreen Solar, Inc.

The Borrower

Date:                                         EVERQ GMBH
      -------------

                      (                       )   (                            )
                       -----------------------     ----------------------------

                                                            (DEUTSCHE BANK LOGO)

<PAGE>

Page 21 from 24 of the Guarantee and Undertaking dated 27 April 2007 from
Evergreen Solar, Inc.

                                                                         ANNEX 1

                       Terms Defined in the Loan Agreement

<TABLE>
<S>                              <C>
Addendum                         Addendum
Agent                            Agent
Arranger                         Arrangeur
Ancillary Bank                   Ancillary Bank
Ancillary Facility               Ancillary Fazilitat
Banks                            Banken
Borrower                         Kreditnehmer
Business Plan                    Businessplan
Causes for termination           Kundigungsgrunde
Completion                       Fertigstellung
Costs and expenses               Kosten und Aufwendungen
Debt Service Reserve Account     Schuldendienstreservekonto
Drawing                          Ziehung
</TABLE>

                                                            (DEUTSCHE BANK LOGO)

<PAGE>

Page 22 from 24 of the Guarantee and Undertaking dated 27 April 2007 from
Evergreen Solar, Inc.

<TABLE>
<S>                              <C>
EverQ2                           EverQ2
Expansion Measures               ExpansionsmaBnahmen
Financing Documents              Finanzierungsdokumente
Financing Parties                Finanzierungsparteien
Guarantee                        Garantie
Guarantee and Undertaking        Guarantee and Undertaking
Guarantee Back-up Security       Garantieunterlegung
Guarantee Back-up Security-1     Garantieunterlegung-1
Guarantee Back-up Security-2     Garantieunterlegung-2
Interest Period                  Zinsperiode
Legal Opinions                   Legal Opinions
Leverage Ratio                   Verschuldungsgrad
Loan Agreement                   Kreditvertrag
Loan Commitments                 Kreditzusage
Notice of Drawing                Ziehungsnachricht
</TABLE>

                                                            (DEUTSCHE BANK LOGO)

<PAGE>

Page 23 from 24 of the Guarantee and Undertaking dated 27 April 2007 from
Evergreen Solar, Inc.

<TABLE>
<S>                              <C>
Project Contracts                Projektvertrage
Representations and Warranties   Bestatigungen und Zusicherungen
Review                           Review
Security Agent                   Sicherheitenagent
Shareholder                      Gesellschafter
Shareholder-2                    Gesellschafter-2
Shareholder-3                    Gesellschafter-3
Tranche A                        Tranche A
Tranche C                        Tranche C
Valuation Opinion                Wertgutachten
</TABLE>

                                                            (DEUTSCHE BANK LOGO)

<PAGE>

Page 24 from 24 of the Guarantee and Undertaking dated 27 April 2007 from
Evergreen Solar, Inc.

                                                                         ANNEX 2

 Addendum to the Amended and Restated Licence and Technology Transfer Agreement

                                                            (DEUTSCHE BANK LOGO)

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