Diamond 3kva (3000va) pure sine wave line interactive ups with automatic voltage control main features capacity: 3kva / 2100w phase: single phase input voltage: 115vac(±5) ~ 295vac(±5) if load ≤ 70%; 160vac(±5) ~ 295vac(±5) if load ≥ 70% frequency: 46 ~ 54(50hz)±0.5hz; 56 ~ 64(60hz)±0.5hz auto sensing input power factor: ≥ 0.97 output voltage220/230vac ± 2% frequency: 50hz / 60hz ± 0.2% thd: 110%, 30s turn to bypass mode; > 150%, 300ms turn to bypass mode crest factor: 3:1 (max) short circuit protection 5 cycles turn off inverter, no transfer tp bypass, provide alarm (ac mode) 5 cycles turn off inverter, provide alarm (ac mode) input fuse blown or breaker action (bypass mode) battery battery: 8x 12v / 7ah dc voltage: 96vdc back-up: 16min (half load); 5min (full load)