Where potential utility power failure threatens the integrity of critical loads, a reliable, independent system of emergency standby power is necessary. In the system s standby mode, normal utility power is supplied to the connected load through a transfer device which monitors the supply for continuity. In this mode, the charger maintains the batteries at full charge. Loss or interruption of utility power initiates the operational mode, in which the inverter draws DC power from the batteries and converts it to emergency AC power to supply the load. It then returns to the standby mode and enters a battery recharge cycle.
All functions are completely automatic.