EX-23.1 4 file004.txt CONSENT OF BDO SEIDMAN, LLP Exhibit 23.1 CONSENT OF INDEPENDENT CERTIFIED PUBLIC ACCOUNTANTS Tremisis Energy Acquisition Corporation New York, NY We hereby consent to the use in the Prospectus constituting a part of this Registration Statement of our report dated March 10, 2004 (except as to Note 8 as to which the date is April 23, 2004) relating to the financial statements of Tremisis Energy Acquisition Corporation, which is contained in that Prospectus. Our report contains an explanatory paragraph regarding uncertainties as to the ability of the Company to continue as a going concern. We also consent to the reference to us under the caption "Experts" in the Prospectus. /s/ BDO Seidman, LLP BDO Seidman, LLP New York, New York May 10, 2004