This high efficiency UL-approved micro-controller based pure sine-wave inverter charger provides an AC output of 100/110/ 115/120 V at 50/60 Hz at 1500 Watts (rated) from the battery input. The TN-1500 series inverter chargers have an in-built solar battery charger and UPS functionality. Preference is given to the solar panels and batteries as sources of power and in the eventuality that these are inadequate; the load is transferred to the utility power supply, resulting in energy-saving. These inverter chargers are UL-458 approved. The units come with an elaborate LED display indicating detailed operating status including battery charge and load power levels. Features include: Battery low alarm, battery low shutdown; over temperature, output short, input polarity reverse and overload protection.