Exhibit            31.2      

CERTIFICATION OF            CFO PURSUANT TO            SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Sanjeev            Kumar, Chief Financial Officer of Energy Conversion Devices, Inc., certify            that:

1.     I have            reviewed this quarterly report on Form 10-Q of Energy Conversion Devices,            Inc.;

2.     Based on            my knowledge, this report does not contain any untrue statement of a material fact or            omit to state a material fact necessary to make the statements made, in light of the            circumstances under which such statements were made, not misleading with respect to the            period covered by this report;

3.     Based on            my knowledge, the financial statements, and other financial information included in            this report, fairly present in all material respects the financial condition, results            of operations and cash flows of the registrant as of, and for, the periods presented in            this report;

4.     The            registrant’s other certifying officer and I are responsible for establishing and            maintaining disclosure controls and procedures (as defined in Exchange Act Rules            13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in            Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:
|   | a) | Designed such                        disclosure controls and procedures, or caused such disclosure controls and                        procedures to be designed under our supervision, to ensure that material                        information relating to the registrant, including its consolidated                        subsidiaries, is made known to us by others within those entities,                        particularly during the period in which this report is being                        prepared;                              |
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|        | b) | Designed such internal                        control over financial reporting, or caused such internal control over                        financial reporting to be designed under our supervision, to provide                        reasonable assurance regarding the reliability of financial reporting and                        the preparation of financial statements for external purposes in accordance                        with generally accepted accounting principles;                                                            |
|        | c) | Evaluated the                        effectiveness of the registrant’s disclosure controls and procedures                        and presented in this report our conclusions about the effectiveness of the                        disclosure controls and procedures, as of the end of the period covered by                        this report based on such evaluation; and                                                                                                                                                                 |
|        | d) | Disclosed in this                        report any change in the registrant’s internal control over financial                        reporting that occurred during the registrant’s most recent fiscal                        quarter (the registrant’s fourth fiscal quarter in the case of an                        annual report) that has materially affected, or is reasonably likely to                        materially affect, the registrant’s internal control over financial                        reporting. |

5.     The            registrant’s other certifying officer and I have disclosed, based on our most            recent evaluation of internal control over financial reporting, to the            registrant’s auditors and the audit committee of registrant’s Board of            Directors (or persons performing the equivalent functions):
|  | a) | All                        significant deficiencies and material weaknesses in the design or operation                        of internal control over financial reporting which are reasonably likely to                        adversely affect the registrant’s ability to record, process,                        summarize and report financial information; and |
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|  | b) | Any                        fraud, whether or not material, that involves management or other employees                        who have a significant role in the registrant’s internal control over                        financial reporting.                                                                                                                       |
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| Date: May                    8, 2008 |                                                     |
|                                 | /S/ Sanjeev Kumar                                        |
|                                 | Sanjeev Kumar                    Chief Financial Officer |