Hitachi COMPUTE BLADE 500 SERIES Management Module Setup Manual page 240

Tip:
• If power supply modules are redundant, the power consumption upper
limit configured by EPC of system unit will be increased by enabling power
capacity expansion function.
• EPC maximum value reflects the power-on status of power supply
modules in real time. When the number of power-on power supply
modules is reduced by the function of powering off unnecessary power
supply modules, the EPC maximum power consumption value may be
shown less than the APC maximum power consumption value temporarily.
APC maximum power consumption is a setting value, which is not
affected by the power-on status of power supply modules.
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Hitachi Compute Blade 500 Series Management Module Setup Guide
Functional detail