Tripp lites smartonline suint1000xl on line double conversion ups protects critical server networking and telecommunications equipment from blackouts voltage fluctuations and transient surges space saving upright tower format large capacity 1000va700w ups continuously converts incoming ac to dc then back to perfect sine wave ac output at selectable 220230240v ac 2 removes harmonic distortion fast electrical impulses frequency fluctuations and other hard to solve power problems