Document:

Exhibit 10.47

                               FIRST AMENDMENT TO
                             BUSINESS LOAN AGREEMENT

      This First Amendment ("Amendment") is made as of the 7th day of October,
2002, by and among FIRST AMERICAN BANK ("Bank") and GREENMAN TECHNOLOGIES OF
IOWA, INC. ("Borrower") and GREENMAN TECHNOLOGIES, INC. ("Guarantor") pursuant
to the Business Loan Agreement dated April 4, 2002 by and among the parties
("Agreement"). Defined terms used herein and not otherwise defined herein shall
have the meaning as set forth in the Agreement.

                                    RECITALS:

      WHEREAS, the Bank, Borrower and Guarantor previously executed the
Agreement dated April 4, 2002 for the purpose of the Borrower to acquire the
assets of the Des Moines, Iowa tire shredding operations of Utah Tire Recyclers,
Inc.;

      WHEREAS, the Borrower desires to borrow additional monies from Bank in the
amount described below to facilitate the acquisition by Borrower of equipment,
including installation expenses for its new tire shredding line; and

      WHEREAS, Bank is willing to loan additional monies to Borrower subject to
the terms and conditions hereinafter set forth.

      NOW, THEREFORE, in consideration of the mutual covenants and agreements
herein contained, the parties agree as follows:

I.    Loan

      A.    Draw Note.

            Subject to the terms and conditions of this Amendment, the Bank
            agrees to lend to the Borrower from time to time during the term of
            this Amendment, for the purchase and installation of new tire
            shredding equipment, amounts at any one time outstanding not to
            exceed Eight Hundred Sixty-Four Thousand Two Hundred Dollars
            ($864,200.00) ("Maximum Draw Credit"). Borrower may from time to
            time draw under this Loan during the term of this Amendment, but may
            not re-borrow any amounts. Interest and principal payments shall be
            payable on the date and in the manner set forth in the Variable Rate
            Draw Note ("Draw Note"). Upon maturity of the

<PAGE>

            Draw Note, any unpaid balance shall be added to the unpaid principal
            and interest balance of the $1,185,000 Term Note to create a new
            term note with a fully amortized term of five years.

      B.    Closing Fees.

            Concurrently with the execution and delivery of this Amendment, and
            as a condition to the making of the Loan hereunder by Bank, Borrower
            shall pay to Bank in cash or other immediately available funds, a
            non-refundable commitment fee in the amount of Three Thousand
            Dollars ($3,000).

II.   Affirmative Covenants

      From the date of this Amendment and thereafter until all Indebtedness of
      the Borrower to the Bank is paid in full, Borrower agrees it will and
      Guarantor shall cause Borrower to:

      A.    Payment on $1,185,000 Term Loan. Upon the sale of the used tire
            shredding equipment to be replaced, whether in a single or several
            transactions, Borrower shall immediately pay Bank the entire sale
            proceeds to be applied to the $1,185,000 Term Loan in accordance
            with its terms and conditions.

III.  Events of Default

      A.    Cross Default. Any event of default under the Agreement shall
            constitute a default hereunder. Further, any event of default under
            this Amendment, Loan, Note or Security Document shall constitute a
            default under the Agreement.

IV.   Miscellaneous

      A.    Costs. Borrower shall be responsible for all "out-of-pocket" costs
            associated with this transaction. "Out-of-pocket" costs shall
            include UCC-1 searches and filing fees. Out-of-pocket costs shall
            not exceed $250.

      B.    Notice. Any notice to Borrower or Guarantor shall be in writing and
            addressed as follows:

                  Mark T. Maust, President
                  GreenMan Technologies of Iowa, Inc.
                  12498 Wyoming Avenue South

                                       -2-
<PAGE>

                  Savage, Minnesota 55378

      C.    Incorporation, Ratification. Except as modified by this Amendment,
            all terms of the Agreement are incorporated herein by this reference
            and remain the same. The Agreement is hereby in all respects
            ratified and affirmed and shall remain in full force and effect.

                                    IMPORTANT

READ BEFORE SIGNING. THE TERMS OF THIS AGREEMENT SHOULD BE READ CAREFULLY
BECAUSE ONLY THOSE TERMS IN WRITING ARE ENFORCEABLE. NO OTHER TERMS OR ORAL
PROMISES NOT CONTAINED IN THIS WRITTEN AMENDMENT MAY BE LEGALLY ENFORCED. YOU
MAY CHANGE THE TERMS OF THIS AMENDMENT ONLY BY ANOTHER WRITTEN AGREEMENT.

Borrower and Guarantor warrant that they have received a copy of this Amendment
and further state that Borrower and Guarantor understand fully the terms and
conditions described herein.

BANK:                                    BORROWER:

FIRST AMERICAN BANK
12333 University Avenue                  GREENMAN TECHNOLOGIES OF IOWA, INC.
P.O. Box 71156                           1914 East Euclid Avenue
Des Moines, IA 50325-0156                Des Moines, IA 50313

By:                                      By:
     --------------------------------        --------------------------
     Scott Geadelmann, Vice President         Mark T. Maust, President

                                         GUARANTOR:

                                         GREENMAN TECHNOLOGIES, INC.
                                         7 Kimball Lane, Building A
                                         Linnfield, MA 01940

                                         By:
                                             -------------------------------
                                              Mark T. Maust, Vice President

                                       -3-Exhibit 10.48

                               SECOND AMENDMENT TO
                             BUSINESS LOAN AGREEMENT

      This Second Amendment ("Amendment") is made as of the 25th day of
February, 2003, by and among FIRST AMERICAN BANK ("Bank") and GREENMAN
TECHNOLOGIES OF IOWA, INC. ("Borrower") and GREENMAN TECHNOLOGIES, INC.
("Guarantor") pursuant to the Business Loan Agreement dated April 4, 2002 by and
among the parties ("Agreement"). Defined terms used herein and not otherwise
defined herein shall have the meaning as set forth in the Agreement or the First
Amendment.

                                    RECITALS:

      WHEREAS, the Bank, Borrower and Guarantor previously executed the
Agreement dated April 4, 2002 for the purpose of the Borrower to acquire the
assets of the Des Moines, Iowa tire shredding operations of Utah Tire Recyclers,
Inc.;

      WHEREAS, the Bank, Borrower and Guarantor previously executed a First
Amendment to the Agreement dated October 9, 2002 ("First Amendment") for the
purpose of the Borrower to facilitate the acquisition of equipment, including
installation expenses for its new tire shredding line; and

      WHEREAS, the Borrower desires to combine the outstanding and unpaid
balance of the $1,185,000 Term Note with the outstanding and unpaid balance of
the Draw Note to create a $1,760,857 Term Note with a fully amortized term of
five years; and

      WHEREAS, Bank is willing to combine the outstanding and unpaid balance of
the Draw Note and the outstanding and unpaid balance of the $1,185,000 Term Note
together to create a $1,760,857 Term Note to Borrower subject to the terms and
conditions hereinafter set forth; and

      WHEREAS, Borrower desires to increase the Revolving Line of Credit for the
purpose of providing Borrower with short-term working capital to fund account
receivables and inventory of finished goods, and pay operating expenses; and

      WHEREAS, Bank is willing to increase the Revolving Line of Credit for the
purpose of providing Borrower with short-term working capital to fund account
receivables and inventory of finished goods, and any operating expenses subject
to the terms and conditions hereinafter set forth.
<PAGE>

      NOW, THEREFORE, in consideration of the mutual covenants and agreements
herein contained, the parties agree as follows:

I.    Loan

      A.    $1,760,857 Term Loan.

            Subject to the terms and conditions of this Amendment, the Bank
agrees to lend to the Borrower a Term Loan in the amount of One Million Seven
Hundred Sixty Thousand Eight Hundred Fifty-seven Dollars ($1,760,857) (the
"$1,760,857 Term Loan"), under which Borrower may borrow a term loan from Bank
to be made in a single drawing on the date hereof. The Borrower shall execute a
promissory note (the "$1,760,857 Term Note") dated as of the date of this
Amendment in the principal amount of $1,760,857 to be fully amortized on a
monthly basis (principal and interest) over a five-year (60 month) period as set
forth in the $1,760,857 Term Note. Absent error, Bank's determination as to the
outstanding principal balance owed by Borrower thereunder shall be conclusive on
all parties, whomsoever and Bank's documentation to support said outstanding
principal balance will be sufficient to establish and sustain Borrower's
obligations hereunder.

      B.    Revolving Line of Credit.

            Subject to the terms and conditions of this Amendment, the Bank
agrees to increase the Maximum Revolving Credit amount of borrowing under the
Revolving Line of Credit from Three Hundred Thousand Dollars ($300,000) to Five
Hundred Thousand Dollars ($500,000) ("Maximum Revolving Credit") for the purpose
of providing Borrower with short-term working capital to fund account
receivables and inventory of finished goods, and pay operating expenses.
Borrower may borrow, repay and re-borrow hereunder during the term of the Line
of Credit Note so long as all provisions of this Amendment are met to Bank's
satisfaction and the total unpaid principal balance which may be outstanding at
any one time does not exceed the Maximum Revolving Credit. The Borrower agrees
to immediately repay any borrowings in excess of the Maximum Revolving Credit.
Borrower shall execute a promissory note ("Line of Credit Note") dated as of the
date of this Amendment in the amount of $500,000. Interest and principal
payments shall be payable on the dates and in the manner set forth in the Line
of Credit Note. The entire outstanding balance of the Revolving Line of Credit
shall be due one year (12 months) from closing ("Maturity") with interest only
monthly payments until Maturity. Absent error, Bank's determination as to the
outstanding principal balance owed by Borrower hereunder shall be conclusive on
all parties whomsoever and Bank's documentation to support said outstanding
principal balance will be sufficient to establish and sustain Borrower's
obligation hereunder.

      C.    Closing Fees.

                                       -2-
<PAGE>

               None.

II.   Definitions.

      Subordinated Debt" shall mean the promissory note executed between
      Borrower and Utah Tire Recyclers, Inc. dated April 1, 2002 and all amounts
      due from Borrower to Guarantor (excluding the amounts due by Borrower to
      Greenman Technologies of Wisconsin, Inc. and Greenman Technologies of
      Minnesota, Inc.). The Subordinated Debt and Tangible Net Worth of Borrower
      was $725,530 at September 30, 2002.

      "Tangible Net Worth" shall mean that number calculated by subtracting from
      the sum of the Borrower's stockholders' equity, all sums relating to
      goodwill, patents, copyrights, trademarks, licenses, franchises, advances
      or loans by the Borrower to any Affiliate, director or shareholder, all
      intercompany transactions between Borrower and any Affiliate, or any other
      asset normally considered an intangible asset under Generally Accepted
      Accounting Principles (GAAP).

      "Borrowing Base Formula" shall mean seventy-five percent (75%) of the
      eligible accounts receivable balance plus sixty percent (60%) of the
      finished goods inventory of packaged crumb rubber. Eligible account
      receivables shall exclude any receivables not paid within ninety (90) days
      of invoice and any Affiliate, contra (offset) or employee account
      receivables.

III.  Affirmative Covenants

      From the date of this Amendment and thereafter until all Indebtedness of
      the Borrower to the Bank is paid in full, Borrower agrees it will and
      Guarantor shall cause Borrower to:

      A.    Minimum Tangible Net Worth and Subordinated Debt. Maintain a minimum
            Tangible Net Worth and Subordinated Debt of at least $500,000.

      B.    Payment on $1,760,857 Term Loan. Upon sale of the used tire
            shredding equipment to be replaced, as contemplated in the First
            Amendment, whether in a single or several transactions, Borrower
            shall immediately pay Bank the entire sale proceeds to be applied to
            the $1,760,857 Term Loan in accordance with its terms and
            conditions.

IV.   Events of Default

                                       -3-
<PAGE>

      A.    Cross Default. Any event of default under the Agreement or the First
            Amendment shall constitute a default hereunder. Further, any event
            of default under this Amendment, $1,760,857 Term Loan, $1,760,857
            Term Note, Line of Credit Note or Security Documents shall
            constitute a default under the Agreement and First Amendment.

V.    Miscellaneous

      A.    Costs. Borrower shall be responsible for all "out-of-pocket" costs.
            "Out-of-pocket" costs shall include UCC-1 searches and filing fees.
            Out-of-pocket costs shall not exceed $250. In addition, Borrower
            shall be responsible for all reasonable attorney fees and costs
            incurred by Bank in the preparation and review of all loan
            documents.

      B.    Notice. Any notice to Borrower or Guarantor shall be in writing and
            addressed as follows:

                   Mark T. Maust, President
                   GreenMan Technologies of Iowa, Inc.
                   12498 Wyoming Avenue South
                   Savage, Minnesota 55378

      C.    Incorporation, Ratification. Except as modified by this Amendment,
            all terms of the Agreement and First Amendment are incorporated
            herein by this reference and remain the same. The Agreement and
            First Amendment are hereby in all respects ratified and affirmed and
            shall remain in full force and effect.

                                    IMPORTANT

READ BEFORE SIGNING. THE TERMS OF THIS AGREEMENT SHOULD BE READ CAREFULLY
BECAUSE ONLY THOSE TERMS IN WRITING ARE ENFORCEABLE. NO OTHER TERMS OR ORAL
PROMISES NOT CONTAINED IN THIS WRITTEN AMENDMENT MAY BE LEGALLY ENFORCED. YOU
MAY CHANGE THE TERMS OF THIS AMENDMENT ONLY BY ANOTHER WRITTEN AGREEMENT.

                                       -4-
<PAGE>

Borrower and Guarantor warrant that they have received a copy of this Amendment
and further state that Borrower and Guarantor understand fully the terms and
conditions described herein.

BANK:                                        BORROWER:

FIRST AMERICAN BANK
12333 University Avenue                      GREENMAN TECHNOLOGIES OF IOWA, INC.
P.O. Box 71156                               1914 East Euclid Avenue
Des Moines, IA 50325-0156                    Des Moines, IA 50313

By:                                          By:
    --------------------------------             -----------------------------
    Scott Geadelmann, Vice President             Mark T. Maust, President

                                             GUARANTOR:

                                             GREENMAN TECHNOLOGIES, INC.
                                             7 Kimball Lane, Building A
                                             Linnfield, MA 01940

                                             By:
                                                 -----------------------------
                                                 Mark T. Maust, Vice President

                                       -5-

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