The AIMS 12000 watt 48V dc Pure Sine Inverter Charger was designed for commercial, industrial and off grid uses where a 48V dc power supply is available and 120/240V ac split phase power is needed. Capable of maintaining a 300 Percent surge for up to 20 seconds, this inverter now features an auxiliary output designed for large centrifugal pumps. The built in auto transfer switch can accept utility or generator power in order to run the built in smart battery charger. Equipped with an Auto Gen Start feature, this inverter is also able to turn on Auto Gen Start compatible generators when the batteries reach low voltage. At 48V dc this inverter is also more efficient, and will allow you to use smaller DC cables than comparable 12V or 24V systems. A 48V dc system is also beneficial for large solar arrays as it will minimize the number of solar charge controllers needed.