EXHIBIT 11 CHARTER POWER SYSTEMS, INC. AND SUBSIDIARIES EARNINGS PER SHARE COMPUTATIONS (Dollars and shares in thousands) (Unaudited) (Unaudited) Three months ended Nine months ended October 31, October 31, 1996 1995 1996 1995 NET INCOME $4,130 $3,896 $10,426 $11,001 ====== ====== ======= ======= Weighted average number of common shares outstanding 6,236 5,955 6,320 5,967 Effect of shares issuable under stock option plan 123 488 183 457 ------ ------ ------ ------ WEIGHTED AVERAGE NUMBER OF SHARES OUTSTANDING (PRIMARY) 6,359 6,443 6,503 6,424 ===== ===== ===== ===== NET INCOME PER COMMON AND COMMON EQUIVALENT SHARE (PRIMARY) $0.65 $0.60 $1.60 $1.71 ===== ===== ===== ===== Weighted average number of common shares outstanding 6,236 5,955 6,320 5,967 Effect of shares issuable under stock option plan 127 488 185 461 ------ ------ ------ ------ WEIGHTED AVERAGE NUMBER OF SHARES OUTSTANDING (FULLY DILUTED) 6,363 6,443 6,505 6,428 ===== ===== ===== ===== NET INCOME PER COMMON AND COMMON EQUIVALENT SHARE (FULLY DILUTED) $0.65 $0.60 $1.60 $1.71 ===== ===== ===== =====