Inverter Specification Model K500 K750 K1000 K1500 K2000 K3000 K5000 Capacity 500W 750W 1000W 1500W 2000W 3000W 5000W Input Voltage (VAC) 140V-280V Frequency (Hz) 50 Output Voltage (VAC) 220 Frequency (Hz) 50 Waveform Sine Wave THP<=3%) Efficiency >=85% (DC to AC) DC External battery voltage (VDC) 12V or 24V 24V or 48V Charge Charge Current Input 220 Vac , 15A MAX Protection Over- load, Short-circuit ,Battery voltage low Alarm Sound Signal Continue Alarm (After alarm will work without sound) When battery voltage low, the alarm will from slow to fast till to off the inverter. LED Show AC status, Inverter status, Trouble status Environment Noise ≤45dB Temperature 0℃∽+40℃ Transfer time AC to DC 4ms DC to AC Less than 10ms Overload When 120%, after 30 seconds shut down , when 150% shut down automatically. With short circuit protection