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                          December 7, 2023

       Nathan Kroeker
       Chief Financial Officer
       Eos Energy Enterprises, Inc.
       3920 Park Avenue
       Edison, New Jersey 08820

                                                        Re: Eos Energy
Enterprises, Inc.
                                                            Registration
Statement on Form S-3
                                                            Filed December 1,
2023
                                                            File No. 333-275863

       Dear Nathan Kroeker:

              This is to advise you that we have not reviewed and will not
review your registration
       statement.

               Please refer to Rules 460 and 461 regarding requests for
acceleration. We remind you
       that the company and its management are responsible for the accuracy and
adequacy of their
       disclosures, notwithstanding any review, comments, action or absence of
action by the staff.

                                                        Please contact Jenny
O'Shanick at 202-551-8005 with any questions.




                          Sincerely,


                          Division of Corporation Finance

                          Office of Manufacturing
       cc:                                              Michael Kaplan