The Xantrex SW inverter provides sine-wave output with high surge, low idle current, and high efficiency. It can be used for off-grid or grid-tie systems with battery backup. It is over 90% efficient through most of its load range, peaking at 95-96% efficiency. SW inverters can be programmed to perform automatic generator start and stop, automatic load sensing and generator support, and includes protective circuitry which guards against downtime. Three user-adjustable voltage-controlled relays are provided to control charging sources and loads. LED status indicators report the status of eight system conditions. Selecting modes, enabling features and adjusting parameters are all easily accomplished by moving through a menu tree that is displayed on the control panel’s LCD read-out. Doubling as a meter, the LCD readout displays inverter AC amps, input AC amps, load AC amps, battery volts, and output voltage and frequency. Adjustable “search mode” can reduce idle power draw to 1 watt when not operating any AC loads. All Xantrex SW inverters include a built-in, programmable, three-stage battery charger, with manual equalize mode, designed for maximum charging efficiency with minimum generator run time. A remote battery temperature sensor is included. Two SW inverters can be connected in series in a 120V/240V split-phase configuration (with twice the wattage), with the addition of the SWI stacking interface cable. Or, two inverters can be connected in parallel for twice the output wattage at 120V with the SWI/PAR stacking interface cable. The SW2512MC is designed for mobile use. SW Series dimensions: 15" x 22.5" x 9". UL Listed. 2-year warranty. Volts 48 AC Volts / Hz 230/50 Continuous Watts 3300 Charge Amps 50 Weight lbs 111