PST-1000-12HD is a pure sine inverter and features a hardwire connection for flexibility in installation, selectable low voltage shutdown (battery protection), and a low voltage alarm and alarm buzzer disable switch. PST-1000-12HD is user-friendly, easy to install, and has a small footprint. AC power is available from a NEMA-20R GFCI duplex outlet on the front panel. Safety certified to UL standards. All Samlex PST series pure sine inverters are high-efficiency, offer quiet operation, low-idle power draw, GFCI protected outlets, and a universal protection circuit – low voltage, over temperature, overload, and short circuit.