NEW! APC Smart-UPS SC 450VA 230V - 1U Rackmount/Tower. APC Smart-UPS SC, 280 Watts / 450 VA,Input 230V / Output 230V, Interface Port DB-9 RS-232, Rack Height 1 U. Typical Backup Time at Half Load 19.4 minutes (140 Watts). Typical Backup Time at Full Load 5.9 minutes (280 Watts