[[INPUT]] Rated voltage: 208 / 220 / 230 / 240 Vac Voltage range: "110 -176 Vac (linear derating between 50% and 100% load), 176 - 280 Vac (no derating), 280 - 300 Vac (derating 50%)" Frequency: 40 - 70 Hz (auto-sense) Power factor: >= 0.99 Bypass voltage range: - 25% + 15% settable Total Harmonic Distortion (THDi) <= 6% [[OUTPUT]] Voltage: 208 / 220 / 230 / 240 Vac (settable via LCD) Voltage regulation : 1 +- Frequency: 45 - 55 Hz or 55 - 65 Hz (synchronized range); 50 / 60 Hz + - 0.1 Hz (battery mode) Waveform: Sinusoidal Power factor: 0.9 Total harmonic distortion (THDv): <= 2% (linear load), <= 5% (non-linear load Crest factor: 3:1 Overload: 105% - 125% for 1 min, 125% - 150% for 30 s, > 150% for 300 ms [[BATTERIES]] DC voltage: 48 V (S) Inbuilt battery: 4 x 9 Ah Charging current (max.): 1A Recharge time : Standard model: 90% capacity restored in 4 hours, Long time model: depend on the capacity of battery [[SYSTEM]] Efficiency: >= 90% (Mains mode), >= 85% (Battery mode), >= 95% (ECO mode) Transfer time: Mains mode to battery mode: 0 ms, Inverter mode to bypass mode: 4 ms (typical) Protections: Short-circuit, overload, overtemperature, battery discharge protection and fan testing protection Communications: RS232 (standard), USB / RS485 / dry contacts / SNMP (optional) Display: LCD + LED Standards: "EN 62040-1, EN 62040-2, EN 61000-3-2, EN 61000-3-3, IEC 61000-4-2, IEC 61000-4-3, IEC 61000-4-4, IEC 61000-4-5, IEC 61000-4-6, IEC 61000-4-8, IEC 61000-4-11, IEC 61000-2-2, IEC 62040-2, IEC 62040-1" [[OTHER SPECS]] Operating temperature: 0 - 40°C Storage temperature: from -25 to 55 °C (without batteries) Relative Humidity: 0 - 95% (non-condensing) Altitude: <= 1000 m, derating 1% for each additional 100 m IP rating: IP 20 Noise level at 1m: <= 50 Db Dimensions: 440 x 430 x 88 Packaged dimensions: 545 x 560 x 201 Net weight (kg): 18.7 Gross weight (kg): 21.8