Exhibit 10.9(f)
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                             AMENDMENT NO. 4 TO THE

                             POWER PURCHASE CONTRACT

                                     between

                       SOUTHERN CALIFORNIA EDISON COMPANY

                                       and

                               ZOND SYSTEMS, INC.
                                  (Monolith II)

                                    QFID 6044

1.      PARTIES

The Parties to this Amendment No. 4 ("Amendment") to the Power Purchase Contract
("Contract") between Southern California Edison Company and Zond Systems, Inc.
are SOUTHERN CALIFORNIA EDISON COMPANY ("Edison"), a California corporation, and
ZOND WINDSYSTEMS PARTNERS, LTD., SERIES 85-B ("Seller"), a California limited
partnership. Edison and Seller are sometimes referred to herein individually as
a "Party" and jointly as the "Parties."

2.      RECITALS

The Parties enter into this Amendment with reference to the following facts,
among others:

2.      On June 22, 1984, Edison and Seller or Seller's predecessor in interest
        executed the Contract, which, among other things, provides for the sale
        to Edison of electrical power generated by a wind turbine project
        identified by Edison as QFID 6044 (the "Project").

2.2     The Contract has previously been amended.

2.3     Certain claims related to the Contract have been raised in civil
        litigation in California superior court, in regulatory proceedings
        pending before the Securities and Exchange Commission and/or the
        Federal Energy Regulatory Commission ("FERC"), and/or in proceedings in
        the United States Bankruptcy Court involving Enron Corp and/or
        affiliates of Enron Corp (collectively, the "Disputes"). The Disputes
        concern, among other things, the status of the Project as a qualifying



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        facility within the meaning of the Public Utility Regulatory Policies
        Act of 1978 ("PURPA") and FERC's regulations implementing PURPA.

2.4     Edison and Seller, acting on behalf of itself and (in its capacity as
        Project Manager under the Contract) all others, if any, that hold an
        ownership or other interest in the Project, or any portion thereof,
        have agreed to resolve the Disputes as they apply to the Contract
        pursuant to the terms of a "Master Definitive Agreement," dated January
        15, 2003 ("Master Definitive Agreement"), which, concurrently with the
        execution of this Amendment, is being executed by Edison, Seller and
        other parties and is hereby incorporated herein by this reference. In
        the Master Definitive Agreement, Edison and Seller have agreed, among
        other things, to execute this Amendment for the purpose of implementing
        certain terms and conditions of the Master Definitive Agreement.

3.      AGREEMENT

In consideration of the promises, mutual covenants and agreements set forth
herein, and for other good and valuable consideration as set forth herein, the
Parties, upon the occurrence of the Satisfaction Date (as defined below)
pursuant to the terms of the Master Definitive Agreement, hereby amend the
Contract effective as of the Effective Date (as defined below), as follows:

3.1     Waived Qualifying Facility Requirements. Section 4.4.12 of the
        Contract is hereby replaced in its entirety with the following new
        Section 4.4.12:

        "4.4.12 Notwithstanding any other provision of this Contract, effective
                on and after the Satisfaction Date, as defined in Section 4 of
                Amendment No. 4, the Project shall not be required to satisfy
                any ownership or size limitation requirements applicable to
                Qualifying Facilities, including, without limitation, 16 U.S.C.
                Section 796(17)(A)(ii), 16 U.S.C. Section 796(17)(C)(ii) and 18
                C.F.R. Sections 292.204(a)(1) and 292.206 (collectively, the
                "Waived QF Requirements"). Notwithstanding the foregoing, and
                although the Project will no longer be required to comply with
                the Waived QF Requirements and therefore will no longer be
                required to be or certify as a Qualifying Facility under the
                Public Utility Regulatory Policies Act of 1978 ("PURPA") and the
                regulations of the Federal Energy Regulatory Commission ("FERC")
                implementing PURPA, the Project will, except for the Waived QF
                Requirements, continue to generate power for sale to Edison
                under the Contract in the manner required under 16 U.S.C.
                Section 796(17)(A)(i), 16 U.S.C. Section 796(17)(B), and 16
                U.S.C. Section 796(17)(C)(i) (but not including, in addition to
                the Waived QF Requirements, any Qualifying Facility
                certification requirements) of PURPA and the FERC regulations

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                implementing the foregoing provisions identified in this
                sentence, 18 C.F.R. Section 292.204(b), as wind power production
                facilities, and further, that with the exception of the Waived
                QF Requirements, this Contract shall continue to be administered
                by Edison as a Qualifying Facility contract."

3.2     Reduction in Capacity Price. Section 9.1.1.1 of the Contract is
        hereby amended to add the following new subsections (c) and (d):

                Notwithstanding Section 9.1.1.1 (b) above, effective for
                deliveries made beginning at 12:01 a.m. Pacific Time on December
                1, 2002 through and including the last day of the Contract Term,
                the time-differentiated D variable shall be calculated using an
                annual as-available capacity rate of $124/kW-yr in lieu of the
                rate that would otherwise apply under Section 9.1.1.1(b)."

                Promptly after the Satisfaction Date, as defined in Section 4 of
                Amendment No. 4, any capacity payments previously made by Edison
                to Seller for deliveries made on and after December 1, 2002
                which were based upon the capacity price in effect prior to the
                occurrence of the Satisfaction Date shall be recalculated using
                the capacity price as revised pursuant to the foregoing Section
                9.1.1.1(c). The difference (without interest) between the
                capacity payment(s) actually made for such deliveries and the
                payments that would have been made using the adjusted capacity
                price specified in Section 9.1.1.1(c) shall be applied as a
                credit to Edison against the next payment due to Seller for both
                Energy and capacity pursuant to the Contract; provided, however,
                that if the amount of such credit to Edison exceeds the full
                amount owing for the first payment due to Seller after the
                Satisfaction Date, Edison shall take a credit equal to the full
                amount owing for the first payment due Seller after the
                Satisfaction Date, and shall apply the remaining balance of the
                credit as an offset to each successive payment due to Seller by
                Edison thereafter in the same manner until the credit is fully
                utilized (all such offsets accruing as of the Satisfaction
                Date). If the credit owed Edison by Seller has not been fully
                utilized by the conclusion of three successive billing cycles
                after the Satisfaction Date, then Edison may, at its option,
                invoice Seller for the remaining, unutilized portion of the
                credit, which invoice shall be paid by Seller within ten (10)
                days of receipt."

3.3     Energy Pricing. New Sections 9.3.1 through 9.3.5 are added to the
        Contract as follows:

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        "9.3.1  In the event that the Commission changes the applicable rate for
                Energy (including, but not limited to, changes to the
                Commission-approved SRAC rate) that is generally applicable,
                during any part of the remaining term of the Contract, to those
                entities owning renewable Qualifying Facilities that signed a
                Renewable Agreement (as defined below) and is applicable under
                this Contract, then, on the date on which such change becomes
                effective, and continuing until such time as such rate is no
                longer applicable pursuant to the terms of this Contract, as
                amended, the Energy rate for power purchases made pursuant to
                the Contract shall, without further action by the Parties or
                otherwise, be the revised rate adopted by the Commission."

        "9.3.2  Nothing herein shall preclude any Party from seeking rehearing
                or other appropriate review of any Commission order(s) or
                decision(s) effecting a change in rate(s) for Energy sales under
                the Contract or from fully participating in any Commission
                proceedings pertaining to such change or proposed change."

        "9.3.3  Notwithstanding the provisions of Sections 9.3.1 and 9.3.2
                above, nothing in those sections shall be construed as modifying
                or diminishing any rights or obligations of the Parties under
                the Energy rate provisions of the Parties' Renewable Agreement,
                including, but not limited to, the provisions therein applicable
                to the Fixed Rate associated with the Fixed Rate Period (as
                those terms are defined in the Renewable Agreement), nor shall
                anything in Sections 9.3.1 and 9.3.2 be construed as conferring
                upon the Commission any rate setting authority that it does not
                already possess with respect to the Contract, as amended
                pursuant to the Renewable Agreement."

        "9.3.4  The term SRAC' as used herein shall have the same meaning as in
                Section 4.35 of the Master Definitive Agreement (as defined in
                Amendment No. 4 to this Contract) and the term "Renewable
                Agreement' shall have the same meaning as in Section 2.3 of the
                Master Definitive Agreement."

4.      EFFECTIVE DATE; SATISFACTION DATE

Upon the occurrence of the Satisfaction Date, this Amendment shall become
effective as of the Effective Date. "Satisfaction Date" shall have the same
meaning as that term has in Article 6 of the Master Definitive Agreement and
"Effective Date" shall have the same meaning as in Section 5.1 of the Master
Definitive Agreement.

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5.      OTHER TERMS AND CONDITIONS

5       None of the provisions of this Amendment, including this paragraph,
        shall be considered waived by either Party except when such waiver is
        given in writing. The failure of either Party to insist in any one or
        more instances upon strict performance of any of the provisions of this
        Amendment or to take advantage of any of its rights hereunder shall not
        be construed as a waiver of any such provisions or the relinquishment
        of any such rights for the future, but the same shall continue and
        remain in full force and effect.

5.2     This Amendment shall not be amended or modified except by a writing
        signed by both Parties.

5.3     This Amendment shall be binding upon and inure to the benefit of the
        Parties hereto and their respective successors and assigns.

5.4     This Amendment is the result of negotiation and each Party has
        participated in its preparation. Accordingly, any rules of construction
        to the effect that an ambiguity is to be resolved against the drafting
        party shall not be employed in the interpretation of this Amendment.

5.5     This Amendment shall be interpreted and governed under the laws of the
        State of California (without giving effect to choice of laws provisions
        that might apply the law of a different jurisdiction).

5.6     Except as expressly amended hereby, all the terms, definitions and
        conditions contained in the Contract, as amended, shall remain in full
        force and effect, and shall apply to this Amendment as though
        incorporated herein.

5.7     Each Party represents and warrants that the person who signs below on
        behalf of such Party has received all requisite authorizations required
        to execute this Amendment on behalf of such Party and to bind such
        Party to the Amendment. Without in any way limiting the foregoing,
        Seller represents and warrants that it has sufficient authority to
        execute this Amendment on behalf of itself and all other parties, if
        any, that hold an ownership or other interest in the Project, or any
        portion thereof, and that this Amendment will represent a binding
        obligation upon the Project and all of its owners in accordance with
        its terms.

5.8     This Amendment is and shall remain confidential pursuant to the
        confidentiality terms of Section 17.1 of the Master Definitive
        Agreement.

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5.9     This Amendment may be executed in one or more counterparts, each of
        which shall be deemed an original document and which together shall
        constitute a single instrument.

ZOND WINDSYSTEMS PARTNERS, LTD., SERIES 85-B,
a California limited partnership

By:     Zond Windsystems Management IV LLC,
        Its general partner

By:     /s/ Eric D. Gadd
        --------------------------------
(print) Eric D. Gadd
        Its President & CEO
        January 15, 2003

SOUTHERN CALIFORNIA EDISON COMPANY,
a California corporation

By      /s/ Alan J. Fohrer
        --------------------------------
        Alan J. Fohrer
        Its  Chief Executive Officer
        January 15 , 2003