The following procedure explains how to change the number of reserve power supply modules (Reserve PSU Count) using the ILOM web interface.
Log in to the ILOM web interface.
Using the tabs at the top of the ILOM web interface, select System Monitoring --> Power Management.
In the Reserve Power Supply field, enter a value that is not more than one less than the total number of energized power supply modules. Zero is the lowest value you can enter.
In the illustration below, Reserve Power Supply is set to 0. If you increase the Reserve Power Supply value to 1, the amount of Available Power is reduced and the amount of Reserve Power is increased.