SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                  SCHEDULE 13G
                                 (RULE 13d-102)

             INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
           TO RULES 13d-1(b)(c) AND (d) AND AMENDMENTS THERETO FILED
                           PURSUANT TO RULE 13d-2(b)*

                        Distributed Energy Systems Corp.
--------------------------------------------------------------------------------
                                (Name of Issuer)

                                  Common Stock
--------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                    25475V104
                      -------------------------------------
                                 (CUSIP Number)

                                December 11, 2003
                      -------------------------------------
                  (Date of Event which Requires Filing of this
                                   Statement)

        Check the appropriate box to designate the rule pursuant to which
                             this Schedule is filed:
                               [ ] Rule 13d-1(b)
                               [X] Rule 13d-1(c)
                               [ ] Rule 13d-1(d)

                                   Page 1 of 5

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

         *The remainder of this cover page shall be filled out for a reporting
person's initial filing on this form with respect to the subject class of
securities, and for any subsequent amendment containing information which would
alter disclosures provided in a prior cover page.

         The information required on the remainder of this cover page shall not
be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange
Act of 1934 or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).



                                  SCHEDULE 13G

-------------------                                                  -----------
CUSIP NO. 25475V104                                                  PAGE 2 OF 5
-------------------                                                  -----------

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1    NAME OF REPORTING PERSON
     S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
     ---------------------------------------------------------------------------
     Lloyd I. Miller, III                                  279-42-7925
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2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*                    (a)[ ]

                                                                          (b)[ ]
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3    SEC USE ONLY
--------------------------------------------------------------------------------
4    CITIZENSHIP OR PLACE OF ORGANIZATION

     United States
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                          5     SOLE VOTING POWER

                                2,053,864
                          ------------------------------------------------------
       NUMBER OF          6     SHARED VOTING POWER
        SHARES
     BENEFICIALLY               1,470,998
       OWNED BY           ------------------------------------------------------
         EACH             7     SOLE DISPOSITIVE POWER
       REPORTING
        PERSON                  2,053,864
         WITH             ------------------------------------------------------
                          8     SHARED DISPOSITIVE POWER

                                1,470,998
--------------------------------------------------------------------------------
9    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     3,524,862
--------------------------------------------------------------------------------
10   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN SHARES      [ ]

--------------------------------------------------------------------------------
11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

     9.9%
--------------------------------------------------------------------------------
12   TYPE OF REPORTING PERSON

     IN-IA-OO
--------------------------------------------------------------------------------

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!



                                                                     Page 3 of 5

Item 1(a).   Name of Issuer:                    Distributed Energy Systems Corp.

Item 1(b).   Address of Issuers's Principal     10 Technology Drive
             Executive Offices:                 Wallingford, CT 06492

Item 2(a).   Name of Person Filing:             Lloyd I. Miller, III

Item 2(b).   Address of Principal Business      4550 Gordon Drive, Naples,
             Office or, if None, Residence:     Florida 34102

Item 2(c).   Citizenship:                       U.S.A.

Item 2(d).   Title of Class of Securities:      Common Stock

Item 2(e).   CUSIP Number:                      25475V104

Item 3.  IF THIS STATEMENT IS FILED PURSUANT TO RULE 13d-1(b) OR 13d-2(b) or
         (c), CHECK WHETHER THE PERSON FILING IS A:

         Not Applicable, this statement is filed pursuant to Rule 13d-1(c).

Item 4.  OWNERSHIP: The reporting person shares dispositive and voting power
         with respect to 1,470,998 of the reported securities as an investment
         advisor to the trustee of a certain family trust. The reporting person
         has sole dispositive and voting power with respect to 2,053,864 of the
         reported securities (i) as the custodian to accounts set up under the
         Florida Uniform Gift to Minors Act, (ii) as the manager of a limited
         liability company that is the general partner of a certain limited
         partnership and (iii) as an individual.

         (a)      3,524,862

         (b)      9.9%

         (c)      (i) sole voting power:         2,053,864

                  (ii) shared voting power:      1,470,998

                  (iii) sole dispositive power:  2,053,864

                  (iv) shared dispositive power: 1,470,998

Item 5.  OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS:

         Not Applicable.

Item 6.  OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON:



                                                                     Page 4 of 5

         Persons other than Lloyd I. Miller, III have the right to receive or
         the power to direct the receipt of dividends from, or the proceeds from
         the sale of, the reported securities.

Item 7.  IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE
         SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY:

         Not Applicable.

Item 8.  IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP:

         Not Applicable.

Item 9.  NOTICE OF DISSOLUTION OF GROUP:

         Not Applicable.


                                                                     Page 5 of 5

Item 10. CERTIFICATION:

         By signing below I certify that, to the best of my knowledge and
         belief, the securities referred to above were not acquired and are not
         held for the purpose of or with the effect of changing or influencing
         the control of the issuer of the securities and were not acquired and
         are not held in connection with or as a participant in any transaction
         having that purpose or effect.

                                    SIGNATURE

         After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.

         Dated: February 17, 2004             /s/ Lloyd I. Miller, III
                                              ---------------------------------
                                              Lloyd I. Miller, III