UNITED STATES

                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

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

                                    FORM 8-K

                                 CURRENT REPORT
     Pursuant to Section 13 or 15(d) of the Securities Exchange Act Of 1934

         Date of report (date of earliest event reported): May 19, 2004

                            BEACON POWER CORPORATION
             (Exact name of registrant as specified in its charter)



        Delaware                   001-16171                      04-3372365
        --------                   ---------                      ----------
(State or other jurisdiction of(Commission File Number)       (I.R.S. Employer
incorporation or organization)                            Identification Number)


                             234 Ballardvale Street
                              Wilmington, MA 01887
                         (Address, including zip code, of
                     registrant's principal executive offices)

                                 (978) 694-9121
              (Registrant's telephone number, including area code)
                      ------------------------------------




Item 5. Other Events and Regulation FD Disclosure.

     On May 19,  2004  the  Company  announced  in a press  release  that it had
received a staff  determination  letter from the Nasdaq  Listing  Qualifications
panel stating that the Company has not met the minimum $1.00 per share bid price
requirement  for 30 consecutive  days and that, in accordance  with  Marketplace
Rule  4310(c)(8)(D),  the Company will be provided an  additional  180 days,  or
until November 15, 2004, to regain compliance.


Item 7. Financial Statements and Exhibits

Exhibit No.                         Description of Exhibit
- --------------                      -------------------------------
99.1                                Press release issued May 19, 2004




                                   SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.


BEACON POWER CORPORATION


Date: May 19, 2004                  /s/James M. Spiezio
                                    --------------------------
                                    Name: James M. Spiezio
                                    Title: Vice President of Finance,
                                           Chief Financial Officer,
                                           Treasurer and Secretary


                                  EXHIBIT INDEX


Exhibit No.                         Description of Exhibit
- --------------                      -------------------------------
99.1                                Press release issued May 19, 2004