ELEVATOR SYSTEM AND METHOD TO CONTROL POWER OF THE ELEVATOR SYSTEM

An illustrative example embodiment of an elevator system (20) includes an elevator car (22, 22') that is configured for movement along a path. An elevator car power supply (30, 30') is supported for movement with the elevator car and includes a plurality of power sources (32). An exchange station (40) near the path is configured to remove, from the elevator car supply, a selected number of the power sources that have a capacity below a selected level and replace each of the removed number of the power sources with a replacement power source having a capacity above the selected level.