... automatically detect low battery voltage and shut down to preserve the battery Overload protection: shutdown and alarm (integrated fuse ... 1,500W, 6.5A Output power (peak power): 3,000W Output frequency: 50 or 60Hz Output waveform: modified sine wave Low-battery voltage alarm ... : 10.5V DC, +/-0.5V Low-battery voltage shutdown: 10.0V DC, +/- ...