1 EXHIBIT 12.1 EXIDE ELECTRONICS GROUP, INC. COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES (DOLLAR AMOUNTS IN THOUSANDS) THREE MONTHS FISCAL YEAR ENDING SEPTEMBER 30, ENDED ------------------------------------------------------- DECEMBER 31, 1991 1992 1993 1994 1995 1995 ------- ------- ------- ------- ------- ------------ EARNINGS: Income (loss) before income taxes and the cumulative effect of accounting change................... $(7,596) $ 9,159 $16,046 $13,459 $12,077 $ 666 Add: Interest expense......... 4,749 5,090 4,421 5,417 5,575 1,497 One-third of rental expense................ 2,194 2,185 2,388 2,593 2,703 676 Less: Equity Method (undistributed income of less than 50% owner) investees.............. 0 (70) 0 (6) (257) (11) ------- ------- ------- ------- ------- ------------ (653) 16,364 22,855 21,463 20,098 2,828 ------- ------- ------- ------- ------- ------------ FIXED CHARGES: Interest expense............ 4,749 5,090 4,421 5,417 5,575 1,497 One-third of rental expense.................. 2,194 2,185 2,388 2,593 2,703 676 ------- ------- ------- ------- ------- ------------ 6,943 7,275 6,809 8,010 8,278 2,173 ------- ------- ------- ------- ------- ------------ Fixed charges in excess of earnings.................... $(7,596) $ 9,089 $16,046 $13,453 $11,820 $ 655 ======= ======= ======= ======= ======= ========== Ratio......................... (0.1) 2.2 3.4 2.7 2.4 1.3 ======= ======= ======= ======= ======= ========== For purposes of determining the ratio of earnings to fixed charges, earnings consist of income before income taxes plus fixed charges minus the undistributed earnings of Exide Electronics' 50%-owned subsidiary accounted for by the equity method. Fixed charges consist of interest expense, which includes amortization of deferred financing costs and one-third of rental expenses, representing that portion of rental expenses attributable to interest. Earnings were inadequate to cover fixed charges for the fiscal year ending September 30, 1991.