Document:

GREENMAN TECHNOLOGIES, INC. AND CERTAIN OF ITS SUBSIDIARIES
                            MASTER SECURITY AGREEMENT

To:   Laurus Master Fund, Ltd.
      c/o Ironshore Corporate Services, Ltd.
      P.O. Box 1234 G.T
      Queensgate House
      South Church Street
      Grand Cayman, Cayman Islands

Date: June 30, 2004

To Whom It May Concern:

      1. To secure the payment of all Obligations (as hereafter defined),
GreenMan Technologies, Inc., a Delaware corporation (the "Company"), each of the
other undersigned parties (other than Laurus Master Fund, Ltd, "Laurus")) and
each other entity that is required to enter into this Master Security Agreement
(each an "Assignor" and, collectively, the "Assignors") hereby assigns and
grants to Laurus a continuing security interest in all of the following property
now owned or at any time hereafter acquired by any Assignor, or in which any
Assignor now have or at any time in the future may acquire any right, title or
interest (the "Collateral"): all cash, cash equivalents, accounts, deposit
accounts (including, without limitation, the deposit accounts related to the
Assignors' lockbox arrangements with Bank North, N.A. (including, without
limitation, the following deposit accounts: [Insert Account Names and Account
Numbers])), inventory, equipment, goods, documents, instruments (including,
without limitation, promissory notes), contract rights, general intangibles
(including, without limitation, payment intangibles and an absolute right to
license on terms no less favorable than those current in effect among our
affiliates), chattel paper, supporting obligations, investment property
(including, without limitation, all equity interests owned by any Assignor),
letter-of-credit rights, trademarks, trademark applications, tradestyles,
patents, patent applications, copyrights, copyright applications and other
intellectual property in which any Assignor now have or hereafter may acquire
any right, title or interest, all proceeds and products thereof (including,
without limitation, proceeds of insurance) and all additions, accessions and
substitutions thereto or therefore. In the event any Assignor wishes to finance
the acquisition in the ordinary course of business of any hereafter acquired
equipment and have obtained a commitment from a financing source to finance such
equipment from an unrelated third party, Laurus agrees to release its security
interest on such hereafter acquired equipment so financed by such third party
financing source. Except as otherwise defined herein, all capitalized terms used
herein shall have the meaning provided such terms in the Securities Purchase
Agreement referred to below and the Security Agreement referred to below, as
applicable.

      2. The term "Obligations" as used herein shall mean and include all debts,
liabilities and obligations owing by each Assignor to Laurus arising under, out
of, or in connection with: (i) that certain Securities Purchase Agreement dated
as of the date hereof by and between the Company and Laurus (the "Securities
Purchase Agreement") and (ii) the Related Agreements referred to in the
<PAGE>

Securities Purchase Agreement, (iii) that certain Security Agreement dated as of
the date hereof among the Company, certain Subsidiaries of the Company and
Laurus (the "Security Agreement") and (iv) the Ancillary Agreements referred to
in the Security Agreement (the Securities Purchase Agreement, each Related
Agreement, the Security Agreement and each Ancillary Agreement, as each may be
amended, modified, restated or supplemented from time to time, are collectively
referred to herein as the "Documents"), and in connection with any documents,
instruments or agreements relating to or executed in connection with the
Documents or any documents, instruments or agreements referred to therein or
otherwise, and in connection with any other indebtedness, obligations or
liabilities of any Assignor to Laurus, whether now existing or hereafter
arising, direct or indirect, liquidated or unliquidated, absolute or contingent,
due or not due and whether under, pursuant to or evidenced by a note, agreement,
guaranty, instrument or otherwise, in each case, irrespective of the
genuineness, validity, regularity or enforceability of such Obligations, or of
any instrument evidencing any of the Obligations or of any collateral therefor
or of the existence or extent of such collateral, and irrespective of the
allowability, allowance or disallowance of any or all of the Obligations in any
case commenced by or against any Assignor under Title 11, United States Code,
including, without limitation, obligations or indebtedness of each Assignor for
post-petition interest, fees, costs and charges that would have accrued or been
added to the Obligations but for the commencement of such case.

      3. Each Assignor hereby jointly and severally represents, warrants and
covenants to Laurus that:

            (a) it is a corporation, partnership or limited liability company,
      as the case may be, validly existing, in good standing and organized under
      the respective laws of its jurisdiction of organization set forth on
      Schedule A, and each Assignor will provide Laurus thirty (30) days' prior
      written notice of any change in any of its respective jurisdiction of
      organization;

            (b) its legal name is as set forth in its respective Certificate of
      Incorporation or other organizational document (as applicable) as amended
      through the date hereof and as set forth on Schedule A, and it will
      provide Laurus thirty (30) days' prior written notice of any change in its
      legal name;

            (c) its organizational identification number (if applicable) is as
      set forth on Schedule A hereto, and it will provide Laurus thirty (30)
      days' prior written notice of any change in any of its organizational
      identification number;

            (d) it is the lawful owner of the respective Collateral and it has
      the sole right to grant a security interest therein and will defend the
      Collateral against all claims and demands of all persons and entities;

            (e) it will keep its respective Collateral free and clear of all
      attachments, levies, taxes, liens, security interests and encumbrances of
      every kind and nature ("Encumbrances"), except (i) Encumbrances securing
      the Obligations, (ii) the Encumbrances set forth on Schedule B hereto and
      (iii) to the extent said Encumbrance does not secure indebtedness in

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<PAGE>

      excess of $50,000 and such Encumbrance is removed or otherwise released
      within ten (10) days of the creation thereof;

            (f) it will, at its and the other Assignors joint and several cost
      and expense keep the Collateral in good state of repair (ordinary wear and
      tear excepted) and will not waste or destroy the same or any part thereof
      other than ordinary course discarding of items no longer used or useful in
      its or such other Assignors' business;

            (g) it will not without Laurus' prior written consent, sell,
      exchange, lease or otherwise dispose of the Collateral, whether by sale,
      lease or otherwise, except for the sale of inventory in the ordinary
      course of business and for the disposition or transfer in the ordinary
      course of business during any fiscal year of obsolete and worn-out
      equipment or equipment no longer necessary for its ongoing needs, having
      an aggregate fair market value of not more than $25,000 and only to the
      extent that:

                  (i) the proceeds of any such disposition are used to acquire
            replacement Collateral which is subject to Laurus' first priority
            perfected security interest, or are used to repay Obligations or to
            pay general corporate expenses; and

                  (ii) following the occurrence of an Event of Default which
            continues to exist the proceeds of which are remitted to Laurus to
            be held as cash collateral for the Obligations;

            (h) it will insure or cause the Collateral to be insured in Laurus'
      name against loss or damage by fire, theft, burglary, pilferage, loss in
      transit and such other hazards as Laurus shall specify in amounts and
      under policies by insurers acceptable to Laurus and all premiums thereon
      shall be paid by such Assignor and the policies delivered to Laurus. If
      any such Assignor fails to do so, Laurus may procure such insurance and
      the cost thereof shall be promptly reimbursed by the Assignors, jointly
      and severally, and shall constitute Obligations;

            (i) it will at all reasonable times allow Laurus or Laurus'
      representatives free access to and the right of inspection of the
      Collateral;

            (j) such Assignor (jointly and severally with each other Assignor)
      hereby indemnifies and saves Laurus harmless from all loss, costs, damage,
      liability and/or expense, including reasonable attorneys' fees, that
      Laurus may sustain or incur to enforce payment, performance or fulfillment
      of any of the Obligations and/or in the enforcement of this Master
      Security Agreement or in the prosecution or defense of any action or
      proceeding either against Laurus or any Assignor concerning any matter
      growing out of or in connection with this Master Security Agreement,
      and/or any of the Obligations and/or any of the Collateral except to the
      extent caused by Laurus' own gross negligence or willful misconduct (as
      determined by a court of competent jurisdiction in a final and
      nonappealable decision).

      4. The occurrence of any of the following events or conditions shall
constitute an "Event of Default" under this Master Security Agreement:

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<PAGE>

            (a) Breach of any covenant, warranty, representation or statement
      made or furnished to Laurus by any Assignor or on any Assignor's benefit
      was false or misleading in any material respect when made or furnished,
      and if subject to cure, shall not be cured for a period of thirty (30)
      days;

      (b) the loss, theft, substantial damage, destruction, sale or encumbrance
      to or of any of the Collateral or the making of any levy, seizure or
      attachment thereof or thereon except to the extent:

                  (i) such loss is covered by insurance proceeds which are used
            to replace the item or repayLaurus; or

                  (ii) said levy, seizure or attachment does not secure
            indebtedness in excess of $100,000 and such levy, seizure or
            attachment has not been removed or otherwise released within thirty
            (30) business days of the creation or the assertion thereof;

            (b) Any Assignor shall (i) apply for, consent to, or suffer to exist
      the appointment of, or the taking of possession by, a receiver, custodian,
      trustee, liquidator or other fiduciary of itself or of all or a
      substantial part of its property, (ii) make a general assignment for the
      benefit of creditors, (iii) commence a voluntary case under any state or
      federal bankruptcy laws (as now or hereafter in effect), (iv) be
      adjudicated a bankrupt or insolvent, (v) file a petition seeking to take
      advantage of any other law providing for the relief of debtors, (vi)
      acquiesce to, or fail to have dismissed, within sixty (60) days, any
      petition filed against it in any involuntary case under such bankruptcy
      laws, or (vii) take any action for the purpose of effecting any of the
      foregoing.;

            (c) the Company shall repudiate, purport to revoke or fail to
      perform any or all of its obligations under any Note (after passage of
      applicable cure period, if any); or

            (d) an Event of Default shall have occurred under and as defined in
      any Document and such default shall not be cured within any applicable
      cure period as provided for in such Document.

      5. Upon the occurrence of any Event of Default and at any time thereafter,
Laurus may declare all Obligations immediately due and payable and Laurus shall
have the remedies of a secured party provided in the Uniform Commercial Code as
in effect in the State of New York, this Agreement and other applicable law.
Upon the occurrence of any Event of Default and at any time thereafter, Laurus
will have the right to take possession of the Collateral and to maintain such
possession on our premises or to remove the Collateral or any part thereof to
such other premises as Laurus may desire. Upon Laurus' request, each of the
Assignors shall assemble or cause the Collateral to be assembled and make it
available to Laurus at a place designated by Laurus. If any notification of
intended disposition of any Collateral is required by law, such notification, if
mailed, shall be deemed properly and reasonably given if mailed at least ten
(10) days before such disposition, postage prepaid, addressed to any Assignor
either at such Assignor's address shown herein or at any address appearing on
Laurus' records for such Assignor. Any proceeds of any disposition of any of the
Collateral shall be applied by Laurus to the payment of all expenses in
connection with the sale of the Collateral, including reasonable attorneys' fees
and other legal expenses and disbursements and the reasonable expense of
retaking, holding, preparing for sale, selling, and the like, and any balance of
such proceeds may be applied by Laurus toward the payment of the Obligations in

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<PAGE>

such order of application as Laurus may elect, and each Assignor shall be liable
for any deficiency. For the avoidance of doubt, following the occurrence and
during the continuance of an Event of Default, Laurus shall have the immediate
right to withdraw any and all monies contained in the Restricted Accounts and
apply same to the repayment of the Obligations (in such order of application as
Laurus may elect).

      6. If any Assignor defaults in the performance or fulfillment of any of
the terms, conditions, promises, covenants, provisions or warranties on such
Assignor's part to be performed or fulfilled under or pursuant to this Master
Security Agreement, Laurus may, at its option without waiving its right to
enforce this Master Security Agreement according to its terms, immediately or at
any time thereafter and without notice to any Assignor, perform or fulfill the
same or cause the performance or fulfillment of the same for each Assignor's
joint and several account and at each Assignor's joint and several cost and
expense, and the cost and expense thereof (including reasonable attorneys' fees)
shall be added to the Obligations and shall be payable on demand with interest
thereon at the highest rate permitted by law, or, at Laurus' option, debited by
Laurus from the Restricted Accounts referred to in the Restricted Account
Agreement.

      7. Each Assignor appoints Laurus, any of Laurus' officers, employees or
any other person or entity whom Laurus may designate as our attorney, with power
to execute such documents in each of our behalf and to supply any omitted
information and correct patent errors in any documents executed by any Assignor
or on any Assignor's behalf; to file financing statements against us covering
the Collateral (and, in connection with the filing of any such financing
statements, describe the Collateral as "all assets and all personal property,
whether now owned and/or hereafter acquired" (or any substantially similar
variation thereof)); to sign our name on public records; and to do all other
things Laurus deem necessary to carry out this Master Security Agreement. Each
Assignor hereby ratifies and approves all acts of the attorney and neither
Laurus nor the attorney will be liable for any acts of commission or omission,
nor for any error of judgment or mistake of fact or law other than gross
negligence or willful misconduct (as determined by a court of competent
jurisdiction in a final and non-appealable decision). This power being coupled
with an interest, is irrevocable so long as any Obligations remains unpaid.

      8. No delay or failure on Laurus' part in exercising any right, privilege
or option hereunder shall operate as a waiver of such or of any other right,
privilege, remedy or option, and no waiver whatever shall be valid unless in
writing, signed by Laurus and then only to the extent therein set forth, and no
waiver by Laurus of any default shall operate as a waiver of any other default
or of the same default on a future occasion. Laurus' books and records
containing entries with respect to the Obligations shall be admissible in
evidence in any action or proceeding, shall be binding upon each Assignor for
the purpose of establishing the items therein set forth and shall constitute
prima facie proof thereof. Laurus shall have the right to enforce any one or
more of the remedies available to Laurus, successively, alternately or
concurrently. Each Assignor agrees to join with Laurus in executing financing
statements or other instruments to the extent required by the Uniform Commercial
Code in form satisfactory to Laurus and in executing such other documents or

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<PAGE>

instruments as may be required or deemed necessary by Laurus for purposes of
affecting or continuing Laurus' security interest in the Collateral.

      9. This Master Security Agreement shall be governed by and construed in
accordance with the laws of the State of New York and cannot be terminated
orally. All of the rights, remedies, options, privileges and elections given to
Laurus hereunder shall inure to the benefit of Laurus' successors and assigns.
The term "Laurus" as herein used shall include Laurus, any parent of Laurus',
any of Laurus' subsidiaries and any co-subsidiaries of Laurus' parent, whether
now existing or hereafter created or acquired, and all of the terms, conditions,
promises, covenants, provisions and warranties of this Agreement shall inure to
the benefit of each of the foregoing, and shall bind the representatives,
successors and assigns of each Assignor. Laurus and each Assignor hereby (a)
waive any and all right to trial by jury in litigation relating to this
Agreement and the transactions contemplated hereby and each Assignor agrees not
to assert any counterclaim in such litigation, (b) submit to the nonexclusive
jurisdiction of any New York State court sitting in the borough of Manhattan,
the city of New York and (c) waive any objection Laurus or each Assignor may
have as to the bringing or maintaining of such action with any such court.

      10. All notices from Laurus to any Assignor shall be sufficiently given if
mailed or delivered to such Assignor's address set forth below.

                                       Very truly yours,

                                       GREENMAN TECHNOLOGIES, INC.

                                       By: /s/ Robert H. Davis
                                       Name: Robert H. Davis
                                       Title: Chief Executive Officer
                                       Address: 7 Kimball Lane
                                                Lynnfield, MA 01940

                                       GREENMAN TECHNOLOGIES OF MINNESOTA, INC.

                                       By: /s/ Charles E. Coppa
                                       Name: Charles E. Coppa
                                       Title:  Treasurer
                                       Address: 12498 Wyoming Ave. South
                                                Savage, MN 55378

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<PAGE>

                                       GREENMAN TECHNOLOGIES OF GEORGIA, INC.

                                       By: /s/ Charles E. Coppa
                                       Name: Charles E. Coppa
                                       Title:  Treasurer
                                       Address: 138 Sherrel Ave.
                                                Jackson, GA 30233

                                       GREENMAN TECHNOLOGIES OF IOWA, INC.

                                       By: /s/ Charles E. Coppa
                                       Name: Charles E. Coppa
                                       Title:  Treasurer
                                       Address: 1914 E. Euclid
                                                Des Moines, IA 53013

                                       GREENMAN TECHNOLOGIES OF TENNESSEE, INC.

                                       By: /s/ Charles E. Coppa
                                       Name: Charles E. Coppa
                                       Title:  Treasurer
                                       Address: 190 Parthenon Blvd.
                                                LaVergne, TN 37086

                                       GREENMAN TECHNOLOGIES OF WISCONSIN, INC.

                                       By: /s/ Charles E. Coppa
                                       Name: Charles E. Coppa
                                       Title:  Treasurer
                                       Address: P.O. Box 913
                                                West Bend, WI 53095-0913

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<PAGE>

                                       GREENMAN TECHNOLOGIES OF CALIFORNIA, INC.

                                       By: /s/ Charles E. Coppa
                                       Name: Charles E. Coppa
                                       Title:  Treasurer
                                       Address: 1501 W. Gladstone Ave.
                                                Azusa, CA 91702

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                                       ACKNOWLEDGED:

                                       LAURUS MASTER FUND, LTD.

                                       By: /s/  Eugene Grin
                                       Name: Eugene Grin
                                       Title: Director

                                       9
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                                   SCHEDULE A

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Entity               Jurisdiction of          Organization Identification
                      Organization                    Number
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[Insert Assignors]
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                                       10Exhibit 4.5

THIS NOTE AND THE COMMON SHARES ISSUABLE UPON CONVERSION OF THIS NOTE HAVE NOT
BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR ANY STATE
SECURITIES LAWS. THIS NOTE AND THE COMMON SHARES ISSUABLE UPON CONVERSION OF
THIS NOTE MAY NOT BE SOLD, OFFERED FOR SALE, PLEDGED OR HYPOTHECATED IN THE
ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT AS TO THIS NOTE UNDER SAID ACT
AND ANY APPLICABLE STATE SECURITIES LAWS OR AN OPINION OF COUNSEL REASONABLY
SATISFACTORY TO GREENMAN TECHNOLOGIES, INC. THAT SUCH REGISTRATION IS NOT
REQUIRED.

                   SECURED CONVERTIBLE MINIMUM BORROWING NOTE

            FOR VALUE RECEIVED, GREENMAN TECHNOLOGIES, INC. a Delaware
corporation (the "Borrower") promises to pay to LAURUS MASTER FUND, LTD., c/o
Ironshore Corporate Services Ltd., P.O. Box 1234 G.T., Queensgate House, South
Church Street, Grand Cayman, Cayman Islands, Fax: 345-949-9877 (the "Holder") or
its registered assigns, on order, the sum of One Million Dollars ($1,000,000),
of, if different, the aggregate principal amount of all "Loans" (as such term is
defined in the Security Agreement referred to below), together with any accrued
and unpaid interest hereon, on June 30, 2007 (the "Maturity Date").

            Capitalized terms used herein without definition shall have the
meanings ascribed to such terms in the Security Agreement between Borrower,
certain Subsidiaries of the Borrower and the Holder dated as of June 30, 2004
(as amended, modified and supplemented from time to time, the "Security
Agreement").

The following terms shall apply to this Minimum Borrowing Note (the "Note"):

                                   ARTICLE I
                                    INTEREST

      1.1 Contract Rate. Subject to Sections 5.3 and 6.7 hereof, interest
payable on this Note shall accrue at a rate per annum equal to the "prime rate"
published in The Wall Street Journal from time to time, plus one percent (1%)
(the "Contract Rate"). The Prime Rate shall be increased or decreased as the
case may be for each increase or decrease in the Prime Rate in an amount equal
to such increase or decrease in the Prime Rate; each change to be effective as
of the day of the change in such rate in accordance with the terms of the
Security Agreement. Subject to Section 1.2, the Contract Rate shall not be less
than five percent (5%).

      1.2 Contract Rate Adjustments and Payments. The Contract Rate shall be
calculated on the last business day of each month hereafter until the Maturity
Date (each a "Determination Date") and shall be subject to adjustment as set
forth herein. If (i) the Borrower shall have registered the shares of the
Borrower's common stock underlying each of the conversion of the Note and that
certain warrant issued to Holder on a registration statement declared effective
by the Securities and Exchange Commission (the "SEC"), and (ii) the market price
(the "Market Price") of the Common Stock as reported by Bloomberg, L.P. on the
<PAGE>

Principal Market (as defined below) for the five (5) trading days immediately
preceding a Determination Date exceeds the then applicable Fixed Conversion
Price by at least twenty five percent (25%), the Interest Rate for the
succeeding calendar month shall automatically be reduced by 200 basis points
(200 b.p.) (2.0.%) for each incremental twenty five percent (25%) increase in
the Market Price of the Common Stock above the then applicable Fixed Conversion
Price. If (i) the Borrower shall not have registered the shares of the
Borrower's common stock underlying the conversion of the Note and that certain
warrant issued to Holder on a registration statement declared effective by the
SEC and which remains effective, and (ii) the Market Price of the Common Stock
as reported by Bloomberg, L.P. on the principal market for the five (5) trading
days immediately preceding a Determination Date exceeds the then applicable
Fixed Conversion Price by at least twenty five percent (25%), the Contract Rate
for the succeeding calendar month shall automatically be decreased by 100 basis
points (100 b.p.) (1.0.%) for each incremental twenty five percent (25%)
increase in the Market Price of the Common Stock above the then applicable Fixed
Conversion Price. Notwithstanding the foregoing (and anything to the contrary
contained in herein), in no event shall the Contract Rate be less than zero
percent (0%). Interest shall be (i) calculated on the basis of a 360 day year,
and (ii) payable monthly, in arrears, commencing on July 1, 2004 and on the
first business day of each consecutive calendar month thereafter until the
Maturity Date (and on the Maturity Date), whether by acceleration or otherwise
(each, a "Contract Rate Payment Date").

                                   ARTICLE II
                          ADVANCES, PAYMENTS UNDER NOTE

            2.1. Mechanics of Advances. All Loans evidenced by this Note shall
be made in accordance with the terms and provisions of the Security Agreement.

            2.2. Fixed Conversion Price. For purposes hereof, subject to Section
3.5 hereof, the initial "Fixed Conversion Price" means $1.31.

            2.3. No Effective Registration. Notwithstanding anything to the
contrary herein, the Holder shall not be required accept shares of Common Stock
as payment following a conversion by the Holder if there fails to exist an
effective current Registration Statement (as defined in the Registration Rights
Agreement) covering the shares of Common Stock to be issued, or if an Event of
Default hereunder exists and is continuing, unless such requirement is otherwise
waived in writing by the Holder in whole or in part at the Holder's option.

            2.4. Optional Redemption in Cash. The Borrower will have the option
of prepaying this Note ("Optional Redemption") by paying to the Holder a sum of
money equal to one hundred twenty percent (120%) of the principal amount of this
Note together with accrued but unpaid interest thereon and any and all other
sums due, accrued or payable to the Holder arising under this Note, the Security
Agreement, or any Ancillary Agreement (as defined in the Security Agreement)
(the "Redemption Amount") on the day written notice of redemption (the "Notice
of Redemption") is given to the Holder. The Notice of Redemption shall specify

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<PAGE>

the date for such Optional Redemption (the "Redemption Payment Date") which date
shall be seven (7) days after the date of the Notice of Redemption (the
"Redemption Period") . A Notice of Redemption shall not be effective with
respect to any portion of this Note for which the Holder has previously
delivered a Notice of Conversion (defined below) pursuant to Section 3.1, or for
conversions elected to be made by the Holder pursuant to Section 3.1 during the
Redemption Period. The Redemption Amount shall be determined as if such Holder's
conversion elections had been completed immediately prior to the date of the
Notice of Redemption. On the Redemption Payment Date, the Redemption Amount
(plus any additional interest and fees accruing on the Notes during the
Redemption Period) must be irrevocably paid in full in immediately available
funds to the Holder. In the event the Borrower fails to pay the Redemption
Amount on the Redemption Payment Date, then such Redemption Notice will be null
and void.

                                  ARTICLE III
                           HOLDER'S CONVERSION RIGHTS

            3.1. Optional Conversion. Subject to the terms of this Article III,
the Holder shall have the right, but not the obligation, at any time until the
Maturity Date, or thereafter during an Event of Default (as defined in Article
V), and, subject to the limitations set forth in Section 3.2 hereof, to convert
all or any portion of the outstanding Principal Amount and/or accrued interest
and fees due and payable into fully paid and nonassessable shares of the Common
Stock at the Fixed Conversion Price. The shares of Common Stock to be issued
upon such conversion are herein referred to as the "Conversion Shares."

            3.2. Conversion Limitation. Notwithstanding anything contained
herein to the contrary, the Holder shall not be entitled to convert pursuant to
the terms of the Note an amount that would (a) be convertible into that number
of shares of Common Stock which, when added to the number of shares of Common
Stock otherwise beneficially owned by such Holder including those issuable upon
exercise of warrants held by such Holder would exceed 4.99% of the outstanding
shares of Common Stock of the Borrower at the time of conversion or (b) exceed
twenty five percent (25%) of the aggregate dollar trading volume of the Common
Stock for the five (5) day trading period immediately preceding delivery of a
Notice of Conversion to the Borrower. For the purposes of the immediately
preceding sentence, beneficial ownership shall be determined in accordance with
Section 13(d) of the Exchange Act and Regulation 13d-3 thereunder. The
conversion limitation described in this Section 3.2 shall automatically become
null and void without any notice to Borrower upon the occurrence and during the
continuance beyond any applicable grace period of an Event of Default, or upon
90 days prior notice to the Borrower, except that at no time shall the
beneficial ownership of the Holder exceed 19.99% of the Common Stock.
Notwithstanding anything contained herein to the contrary, the number of shares
of Common Stock issuable by the Borrower and acquirable by the Holder at a price
below $1.19 per share pursuant to the terms of this Note, any other Minimum
Borrowing Note, any Revolving Note, any Ancillary Agreement, the Securities
Purchase Agreement and/or any Related Agreement (as defined in the Securities
Purchase Agreement), shall not exceed an aggregate of 3,801,237 shares of the
Borrower's Common Stock (subject to appropriate adjustment for stock splits,
stock dividends, or other similar recapitalizations affecting the Common Stock)
(the "Maximum Common Stock Issuance"), unless the issuance of shares hereunder

                                        3
<PAGE>

in excess of the Maximum Common Stock Issuance shall first be approved by the
Borrower's shareholders. If at any point in time and from time to time the
number of shares of Common Stock issued pursuant to the terms of this Note, any
other Minimum Borrowing Note, any Revolving Note, any Ancillary Agreement, the
Securities Purchase Agreement and/or any Related Agreement, together with the
number of shares of Common Stock that would then be issuable by the Borrower to
the Holder in the event of a conversion or exercise pursuant to the terms of
this Note, any other Minimum Borrowing Note, any Revolving Note, any Ancillary
Agreement, the Securities Purchase Agreement and/or any Related Agreement, would
exceed the Maximum Common Stock Issuance but for this Section 3.2, the Borrower
shall promptly call a shareholders meeting to solicit shareholder approval for
the issuance of the shares of Common Stock hereunder in excess of the Maximum
Common Stock Issuance.

            3.3. Mechanics of Holder's Conversion. In the event that the Holder
elects to convert this Note into Common Stock, the Holder shall give notice of
such election by delivering an executed and completed notice of conversion
("Notice of Conversion") to the Borrower and such Notice of Conversion shall
provide a breakdown in reasonable detail of the Principal Amount, accrued
interest and fees that are being converted. On each Conversion Date (as
hereinafter defined) and in accordance with its Notice of Conversion, the Holder
shall make the appropriate reduction to the Principal Amount, accrued interest
and fees as entered in its records and shall provide written notice thereof to
the Borrower within two (2) business days after the Conversion Date. Each date
on which a Notice of Conversion is delivered or telecopied to the Borrower in
accordance with the provisions hereof shall be deemed a Conversion Date (the
"Conversion Date"). A form of Notice of Conversion to be employed by the Holder
is annexed hereto as Exhibit A. Pursuant to the terms of the Notice of
Conversion, the Borrower will issue instructions to the transfer agent
accompanied by an opinion of counsel within one (1) business day of the date of
the delivery to Borrower of the Notice of Conversion and shall cause the
transfer agent to transmit the certificates representing the Conversion Shares
to the Holder by crediting the account of the Holder's designated broker with
the Depository Trust Corporation ("DTC") through its Deposit Withdrawal Agent
Commission ("DWAC") system within three (3) business days after receipt by the
Borrower of the Notice of Conversion (the "Delivery Date"). In the case of the
exercise of the conversion rights set forth herein the conversion privilege
shall be deemed to have been exercised and the Conversion Shares issuable upon
such conversion shall be deemed to have been issued upon the date of receipt by
the Borrower of the Notice of Conversion. The Holder shall be treated for all
purposes as the record holder of such Common Stock, unless the Holder provides
the Borrower written instructions to the contrary.

            3.4. Late Payments. The Borrower understands that a delay in the
delivery of the shares of Common Stock in the form required pursuant to this
Article beyond the Delivery Date could result in economic loss to the Holder. As
compensation to the Holder for such loss, the Borrower agrees to pay late
payments to the Holder for late issuance of such shares in the form required
pursuant to this Article III upon conversion of the Note, in the amount equal to
$500 per business day after the Delivery Date. The Borrower shall pay any
payments incurred under this Section in immediately available funds upon demand.

            3.5. Adjustment Provisions. The Fixed Conversion Price and number
and kind of shares or other securities to be issued upon conversion determined
pursuant to Section 2.2 shall be subject to adjustment from time to time upon
the happening of certain events while this conversion right remains outstanding,
as follows:

                                        4
<PAGE>

                  A. Reclassification, etc. If the Borrower at any time shall,
by reclassification or otherwise, change the Common Stock into the same or a
different number of securities of any class or classes, this Note, as to the
unpaid Principal Amount and accrued interest thereon, shall thereafter be deemed
to evidence the right to purchase an adjusted number of such securities and kind
of securities as would have been issuable as the result of such change with
respect to the Common Stock (i) immediately prior to or (ii) immediately after
such reclassification or other change at the sole election of the Holder.

                  B. Stock Splits, Combinations and Dividends. If the shares of
Common Stock are subdivided or combined into a greater or smaller number of
shares of Common Stock, or if a dividend is paid on the Common Stock or any
preferred stock issued by the Borrower in shares of Common Stock, the Fixed
Conversion Price shall be proportionately reduced in case of subdivision of
shares or stock dividend or proportionately increased in the case of combination
of shares, in each such case by the ratio which the total number of shares of
Common Stock outstanding immediately after such event bears to the total number
of shares of Common Stock outstanding immediately prior to such event.

                  C. Share Issuances. Subject to the provisions of this Section
2.4, if the Borrower shall at any time prior to the conversion or repayment in
full of the Principal Amount issue any shares of Common Stock or securities
convertible into Common Stock to a person other than the Holder (except (i)
pursuant to Subsections A or B above; (ii) pursuant to options, warrants, or
other obligations to issue shares outstanding on the date hereof as disclosed to
Holder in writing; (iii) pursuant to options that may be issued under any
employee incentive stock option and/or any qualified stock option plan adopted
by the Borrower; or (iv) shares of Common Stock not to exceed 250,000 in the
aggregate (as calculated on the date hereof and appropriately adjusted for any
subdivision, combination or similar event), so long as (x) such shares are
restricted and do not become freely or publicly traded in any respect prior to
the one year anniversary of the issuance thereof , (y) such shares are issued at
a price per share no lees than 100% of the average closing price of the Common
Stock for the 10 days prior to the issuance thereof and (z) such shares are
issued in connection with acquisitions, joint ventures and other business
development initiatives) for a consideration per share (the "Offer Price") less
than the Fixed Conversion Price in effect at the time of such issuance, then the
Fixed Conversion Price shall be immediately reset to such lower Offer Price. For
purposes hereof, the issuance of any security of the Borrower convertible into
or exercisable or exchangeable for Common Stock shall result in an adjustment to
the Fixed Conversion Price upon the issuance of such securities.

                  D. Computation of Consideration. For purposes of any
computation respecting consideration received pursuant to Subsection C above,
the following shall apply:

                        (a) in the case of the issuance of shares of Common
Stock for cash, the consideration shall be the amount of such cash, provided
that in no case shall any deduction be made for any commissions, discounts or
other expenses incurred by the Borrower for any underwriting of the issue or
otherwise in connection therewith;

                        (b) in the case of the issuance of shares of Common
Stock for a consideration in whole or in part other than cash, the consideration
other than cash shall be deemed to be the fair market value thereof as

                                        5
<PAGE>

determined in good faith by the Board of Directors of the Borrower (irrespective
of the accounting treatment thereof); and

                        (c) Upon any such exercise, the aggregate consideration
received for such securities shall be deemed to be the consideration received by
the Borrower for the issuance of such securities plus the additional minimum
consideration, if any, to be received by the Borrower upon the conversion or
exchange thereof (the consideration in each case to be determined in the same
manner as provided in clauses (a) and (b) of this Subsection (D)).

            E. Further Adjustment. With respect to every $1 million of
conversions made under this Minimum Borrowing Note, any other Minimum Borrowing
Note or the Revolving Note, the then applicable Fixed Conversion Price shall be
adjusted to equal 110% of the average closing price for the twenty two (22)
trading days prior to the last day of the period during which such $1 million
has been converted, solely to the extent that such an adjustment would result in
an increase to the Fixed Conversion Price.

            3.6. Reservation of Shares. During the period the conversion right
exists, the Borrower will reserve from its authorized and unissued Common Stock
a sufficient number of shares to provide for the issuance of Common Stock upon
the full conversion of this Note. The Borrower represents that upon issuance,
such shares will be duly and validly issued, fully paid and non-assessable. The
Borrower agrees that its issuance of this Note shall constitute full authority
to its officers, agents, and transfer agents who are charged with the duty of
executing and issuing stock certificates to execute and issue the necessary
certificates for shares of Common Stock upon the conversion of this Note.

            3.7. Registration Rights. The Holder has been granted registration
rights with respect to the shares of Common Stock issuable upon conversion of
this Note as more fully set forth in a Registration Rights Agreement dated as of
the date hereof between the Borrower and the Holder. ARTICLE IV EVENTS OF
DEFAULT

            4.1 Events of Default. The occurrence of any of the events set forth
in Section 19 of the Security Agreement (subject to any applicable period to
cure such Event of Default as set forth in the Security Agreement, this Note or
any Ancillary Agreement) shall be an Event of Default ("Event of Default").

                           DEFAULT RELATED PROVISIONS

            4.2 Payment Grace Period. The Borrower shall have a three (3)
business day grace period to pay any monetary amounts due under this Note or the
Security Agreement or any Ancillary Agreements, after which grace period a
default interest rate of ten percent (10%) per annum above the then applicable
interest rate hereunder shall apply to the monetary amounts due.

            4.2 Conversion Privileges. The conversion privileges set forth in
Article III shall remain in full force and effect immediately from the date
hereof and until this Note is paid in full.

                                        6
<PAGE>

            4.4 Cumulative Remedies. The remedies under this Note shall be
cumulative.

                                   ARTICLE V
                                DEFAULT PAYMENTS

            5.1. Default Payment. If an Event of Default occurs and is
continuing beyond any applicable grace period, the Holder, at its option, may
elect, in addition to all rights and remedies of Holder under the Security
Agreement and all obligations of Borrower under the Security Agreement, to
require the Borrower to make a Default Payment ("Default Payment"). The Default
Payment shall be 20% of the outstanding principal amount of the Note. If
required, such Default Payment shall be in addition to the Borrower's obligation
to pay any then outstanding principal, plus accrued but unpaid interest, all
other fees then remaining unpaid, and all other amounts payable hereunder.
Payment upon default shall be applied first to any fees due and payable to
Holder pursuant to the Notes or the Ancillary Agreements, then to accrued and
unpaid interest due on the Notes and then to outstanding principal balance of
the Notes.

            5.2. Default Payment Date and Default Notice Period. The Default
Payment (if required) and any and all other payments of principal, accrued and
unpaid interest and other unpaid fees hereunder shall be due and payable on the
fifth business day after an Event of Default as defined in Article IV ("Default
Payment Date") has occurred and is continuing beyond any applicable grace
period. The period between date upon which of an Event of Default has occurred
and is continuing beyond any applicable grace period and the Default Payment
Date shall be the "Default Period." If during the Default Period, the Borrower
cures the Event of Default, the Event of Default will no longer exist and any
additional rights the Holder had triggered by the occurrence and continuance of
an Event of Default will no longer exist. If the Event of Default is not cured
during the Default Notice Period, all amounts payable hereunder shall be due and
payable on the Default Payment Date, all without further demand, presentment or
notice, or grace period, all of which hereby are expressly waived.

            5.3. Default Interest Rate. Following the occurrence and during the
continuance of an Event of Default, interest on this Note shall automatically be
increased to two percent (2.0%) per month, and all outstanding Obligations,
including unpaid interest, shall continue to accrue interest from the date of
such Event of Default at such interest rate applicable to such Obligations until
such Event of Default is cured or waived.

            5.4. Cumulative Remedies. The remedies under this Note shall be
cumulative.

                                        7
<PAGE>

                                   ARTICLE VI
                                  MISCELLANEOUS

            6.1. Failure or Indulgence Not Waiver. No failure or delay on the
part of the Holder hereof in the exercise of any power, right or privilege
hereunder shall operate as a waiver thereof, nor shall any single or partial
exercise of any such power, right or privilege preclude other or further
exercise thereof or of any other right, power or privilege. All rights and
remedies existing hereunder are cumulative to, and not exclusive of, any rights
or remedies otherwise available.

            6.2. Notices. Any notice herein required or permitted to be given
shall be in writing and provided in accordance with the terms of the Security
Agreement.

            6.3. Amendment Provision. The term "Note" and all reference thereto,
as used throughout this instrument, shall mean this instrument as originally
executed, or if later amended or supplemented, then as so amended or
supplemented, and any successor instrument as it may be amended or supplemented.

            6.4. Assignability. This Note shall be binding upon the Borrower and
its successors and assigns, and shall inure to the benefit of the Holder and its
successors and assigns, and may be assigned by the Holder in accordance with the
requirements of the Security Agreement.

            6.5. Cost of Collection. If default is made in the payment of this
Note, the Borrower shall pay the Holder hereof reasonable costs of collection,
including reasonable attorneys' fees.

            6.6. Governing Law. This Note shall be governed by and construed in
accordance with the laws of the State of New York, without regard to principles
of conflicts of laws. Any action brought by either party against the other
concerning the transactions contemplated by this Agreement shall be brought only
in the state courts of New York or in the federal courts located in the state of
New York. Both parties and the individual signing this Note on behalf of the
Borrower agree to submit to the jurisdiction of such courts. The prevailing
party shall be entitled to recover from the other party its reasonable
attorney's fees and costs. In the event that any provision of this Note is
invalid or unenforceable under any applicable statute or rule of law, then such
provision shall be deemed inoperative to the extent that it may conflict
therewith and shall be deemed modified to conform with such statute or rule of
law. Any such provision which may prove invalid or unenforceable under any law
shall not affect the validity or unenforceability of any other provision of this
Note. Nothing contained herein shall be deemed or operate to preclude the Holder
from bringing suit or taking other legal action against the Borrower in any
other jurisdiction to collect on the Borrower's obligations to Holder, to
realize on any collateral or any other security for such obligations, or to
enforce a judgment or other court order in favor of Holder.

            6.7. Maximum Payments. Nothing contained herein shall be deemed to
establish or require the payment of a rate of interest or other charges in
excess of the maximum permitted by applicable law. In the event that the rate of
interest required to be paid or other charges hereunder exceed the maximum

                                        8
<PAGE>

permitted by such law, any payments in excess of such maximum shall be credited
against amounts owed by the Borrower to the Holder and thus refunded to the
Borrower.

            6.8. Security Interest and Guarantee. The Holder has been granted a
security interest (i) in certain assets of the Borrower and its Subsidiaries as
more fully described in (x) the Security Agreement and (y) the Master Security
Agreement dated as of the date hereof and (ii) pursuant to the Stock Pledge
Agreement dated as of the date hereof. The obligations of the Borrower under
this Note are guaranteed by certain Subsidiaries of the Borrower pursuant to the
Subsidiary Guaranty dated as of the date hereof.

            6.9. Construction. Each party acknowledges that its legal counsel
participated in the preparation of this Note and, therefore, stipulates that the
rule of construction that ambiguities are to be resolved against the drafting
party shall not be applied in the interpretation of this Note to favor any party
against the other.

      [Balance of page intentionally left blank; signature page follows.]

                                        9
<PAGE>

            IN WITNESS WHEREOF, the Borrower has caused this Secured Convertible
Minimum Borrowing Note to be signed in its name effective as of this 30th day of
June, 2004.

                                        GREENMAN TECHNOLOGIES, INC.

                                        By: /s/ Robert H. Davis
                                        Name: Robert H. Davis
                                        Title: Chief Executive Officer

WITNESS:

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

                                       10
<PAGE>

                              NOTICE OF CONVERSION

(To be executed by the Holder in order to convert the Note)

            The undersigned hereby elects to convert $_________ of the principal
and $_________ of the interest due on the Secured Convertible Minimum Borrowing
Note issued by GreenMan Technologies, Inc. on June 30, 2004 into Shares of
Common Stock of GreenMan Technologies, Inc. (the "Borrower") according to the
conditions set forth in such Note, as of the date written below.

Date of Conversion:
                          ------------------------------------------------------

Conversion Price:
                          ------------------------------------------------------

Shares To Be Delivered:
                          ------------------------------------------------------

Signature:
                          ------------------------------------------------------

Print Name:
                          ------------------------------------------------------

Address:
                          ------------------------------------------------------

                          ------------------------------------------------------
Holder DWAC
instructions
                          ------------------------------------------------------

                                       11

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