<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM CONSOLIDATED
FINANCIAL STATEMENTS OF ENVIRONMENTAL POWER CORPORATION AS OF SEPTEMBER 30,
2000 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<RESTATED>
<PERIOD-TYPE> 9-MOS 9-MOS
<FISCAL-YEAR-END> DEC-31-2000 DEC-31-1999
<PERIOD-START> JAN-01-2000 JAN-01-1999
<PERIOD-END> SEP-30-2000 SEP-30-1999
<CASH> 664,813<F1> 487,017<F2>
<SECURITIES> 0 0
<RECEIVABLES> 7,768,137 7,173,083
<ALLOWANCES> 0 0
<INVENTORY> 575,849 656,071
<CURRENT-ASSETS> 9,170,452 8,499,904
<PP&E> 1,077,016 1,045,147
<DEPRECIATION> 465,481 227,895
<TOTAL-ASSETS> 67,960,048 60,788,334<F3>
<CURRENT-LIABILITIES> 10,316,212 11,058,086
<BONDS> 2,312,912 3,025,924<F3>
<PREFERRED-MANDATORY> 0 0
<PREFERRED> 100 100
<COMMON> 125,254 125,254
<OTHER-SE> 4,081,038 5,797,632<F3>
<TOTAL-LIABILITY-AND-EQUITY> 67,960,048 60,788,334<F3>
<SALES> 41,165,018 35,495,619
<TOTAL-REVENUES> 41,165,018 35,495,619
<CGS> 17,065,816 16,667,258<F3>
<TOTAL-COSTS> 17,065,816 16,667,258<F3>
<OTHER-EXPENSES> 19,703,145 16,966,220
<LOSS-PROVISION> 0 0
<INTEREST-EXPENSE> 240,161 275,551
<INCOME-PRETAX> 3,630,140 367,712
<INCOME-TAX> 1,598,000 153,000<F3>
<INCOME-CONTINUING> 2,032,140 214,712
<DISCONTINUED> 0 0
<EXTRAORDINARY> 0 0
<CHANGES> 0 0
<NET-INCOME> 2,032,140 214,712
<EPS-BASIC> .18 .02
<EPS-DILUTED> .18 .02
<FN>
<F1>INCLUDES RESTRICTED CASH OF $446,620
<F2>INCLUDES RESTRICTED CASH OF $265,081
<F3>The Company's financial data as of and for the nine months ended September 30,
1999 has been restated to reflect change in the method of accounting for major
equipment overhauls
</FN>