Uninterruptible Power Supply Systems and Methods for Communication Systems

A method of supplying power to a load, comprising the steps of:

• storing battery power in a battery system;
• operatively connecting an inverter to the battery system;
• providing a transformer;
• and
• operatively connecting the transformer to the AC line;
• operatively connecting the transformer to the load;
• operatively connecting the transformer to the inverter;
• controlling the inverter to supply power to the primary winding using battery power stored in the battery system based on a cost value indicative of reduction of life of the battery system.

An uninterruptible power supply adapted to be connected between an AC line and a load, comprising:

• a battery system for storing battery power;
• an inverter operatively connected to the battery system;
• a transformer comprising
• a primary winding adapted to be operatively connected to the AC line,
• a load winding adapted to be operatively connected to the load, and
• an inverter winding operatively connected to the inverter;
• and
• a controller for controlling the inverter to operate in
• a first mode in which the inverter supplies power to the battery system,
• a second mode in which the inverter supplies power to the load winding using battery power stored in the battery system, and
• a third mode based on a cost value indicative of reduction of life of the battery system.