Eaton Evolution 1550. Output power capacity (VA): 1440 VA, Output power: 1100 W, Power supply input frequency: 50/60 Hz. Battery technology: Sealed Lead Acid (VRLA), Typical backup time at half load: 14 min, Typical backup time at full load: 5 min. Operating temperature range (T-T): 0 - 40 °C. Certification: CE, CB report, TÜV, UL/cUL. Noise level: 40 dB