User Manual

QuickSpecs
HPE Flexible Slot Power Supplies
Standard Features
Page 6
A single Flex Slot Power Supply supporting the entire load of the server can achieve the highest
efficiency when operating in the middle range (50%) of its capacity.
For redundant
Flex Slot Power Supplies operating in load-balanced mode (the default mode when
adding redundant power supplies), the load is shared e
qually between the two power supplies. In
general, the load
-balanced mode offers better efficiency for loads requiring more than 60 percent of
the primary power supply capacity.
When high
-efficiency mode is enabled for redundant supplies (via the server's ROM-based setup utility
under System options
-> Redundancy options), each power supply in the server is designated as either
a pri
mary or secondary supply, and the entire server load is shifted to the primary power supply. This
allows the primary power supply to operate at higher efficiency points on the load curve while the
secondary power supply operates in idle mode, providing no
output power and consuming very little
energy (typically two to four watts per supply). The user can also specify that odd or even power
supplies will be designated manually or automatically as secondary supplies. This flexibility allows users
to balance the load across a rack manually or automatically.
Compatibility
HPE Flex Slot power supplies are compatible with all HPE ProLiant Gen9 Performance servers
including the:
• HPE ProLiant DL360 Gen9
• HPE ProLiant DL380 Gen9
• HPE ProLiant ML350 Gen9
To check for power supply compatibility, please review the appropriate
HPE Server QuickSpecs
at http://www.hp.com/go/qs
.