Emergency power source 300W PROsinus with sinusoidal waveform and 12V battery charging function Emergency power source KEMOT PROsinus-300 is an inverter with pure sinusoidal waveform and charging function is designed to supply AC voltage to consumers with a rated voltage of 230 VAC and power up to 300W: - Emergency power supply for furnaces - RTV appliances (televisions, tuners, hi-fi, dvds) - Domestic appliances (refrigerators, blenders) - Power tools (drills, grinders) - Power chargers (smartphones, tablets, phones, laptops, gps) - Pumps, compressors (water, heat, air conditioners) - Office equipment (fax machines, computers, monitors) - Other devices with a power supply of up to 300 W in continuous operation Due to the CLEAN SINUSOIDAL waveform of the output voltage (supplying power to loads), the device ensures stable operation of loads and no effect of overheating inductive loads such as pumps or fans. Together with a 12V battery it is a complete 230 VAC guaranteed power supply unit. The unit is equipped with a battery protection system against overload, short circuit, overvoltage, too high or too low voltage and overheating. The unit can operate in three modes: 1. as an emergency power source with charging function - converts 12 VDC DC voltage supplied from an external battery to 230 VAC and recharges the external battery. 2. as a rectifier - recharges the external battery (the device must be connected to the 230 VAC mains supply). 3. as a converter - converts 12 VDC DC voltage fed from the external battery to 230 VAC alternating voltage The device is equipped with a clear and easy to read LED display with indicators of the current status: - power supply - input voltage - output voltage and frequency - load level - battery charge level Specifications: - rated power: 300W - works with 12V batteries - maximum battery voltage: 15VDC - output voltage range: 230 VAC ±8% - output frequency: 50/60 Hz ±0.5Hz - output voltage shape: pure sine wave - output voltage stabilization - output efficiency: ≥ 85% (DC to AC) - battery charging current: max. 10A - switching time: ≤ 4 ms - protections: against overload, short circuit, too high or too low voltage - permissible operating temperature: 0-40 C - permissible humidity: 10 - 90% - weight: 4.7 kg - dimensions: 25.5x26x16 cm The battery is not included in the set. The battery should be purchased separately selecting the capacity according to individual needs. Battery selection: In order to achieve the highest performance of this product, the device should be used with batteries with a maximum capacity of 100 Ah: gel batteries or some acid batteries reaching 14.5 VDC during charging. To optimally select the battery for the intended load, use the approximate formula: 100 W of load = → 10 A of battery current draw Example: with a load of 150 W and a 100 Ah battery, the approximate operating time is 100Ah / 15A≈ (approximately) 6.5h.