HPE ProLiant DL180 Gen9 Power Supplies
Genuine HPE power hardware for the HPE ProLiant DL180 Gen9, new and refurbished. Redundancy works differently on this platform than on the larger ProLiants: it is not two supplies dropped into two bays, it is a redundant power supply backplane carrying up to two AC power input modules, and the backplane is mandatory with any redundant module.
DL180 Gen9 Power Supply Specifications
- Redundant architecture: an RPS power backplane plus AC power input modules; HPE states the backplane is mandatorily needed with the power input module, and each backplane supports up to two modules
- Redundant module: the 900W AC 240VDC power input module, 80 Plus Gold with an efficiency rating of up to 92%, on a standard C14 inlet, taking 100 to 240V AC at 47 to 63 Hz as well as 240V DC; the module listed here is rated 800W Gold in a redundant pair and 900W standing alone
- Non-redundant alternative: the 550W FIO power supply, 80 Plus Silver with an efficiency rating of up to 89%, a factory-installed option on entry models
- Failover behaviour: redundant AC power input modules do not share power — module 1 is the primary and module 2 is the backup
- Mixing: not supported. All power supplies must be of the same input voltage, output rating and efficiency rating, or the server reports errors
- Cooling: two hot-swap fans on a non-redundant single-processor server and four with fan redundancy, rising to four and five respectively on a two-processor server
Redundancy here is a backplane, not just a second supply. HPE makes the RPS power backplane mandatory with the redundant power input module, and each backplane carries up to two modules. The pair does not share load either — module 1 is primary and module 2 is backup — so size the configuration against one module.
Do You Need the Backplane as Well as the Module?
| Non-redundant | Redundant | |
|---|---|---|
| Supply | 550W FIO power supply | 900W AC 240VDC power input module |
| Efficiency | 80 Plus Silver, up to 89% | 80 Plus Gold, up to 92% |
| Backplane | Not used | Required |
| Modules fitted | One | Up to two per backplane |
| Load sharing | Not applicable | None: module 1 primary, module 2 backup |
Usually yes, and it catches people out. A server running a single 550W supply cannot be made redundant by buying a second one, because redundancy here means the backplane and the modules that mount on it. Where the backplane is already fitted, a second matching module finishes the job. And since the modules do not share load, a redundant pair is failover rather than extra capacity — size one module against the build.
Choosing the Right DL180 Gen9 Power Supply
- Read the label on the installed unit first. Input voltage, output rating and efficiency rating all have to match across the server, so the fitted supply is the specification.
- Redundancy needs the backplane, not just a second module. HPE documents the RPS backplane as mandatory with the redundant power input module.
- Size against one module, not two. The pair does not share load, so the primary module alone has to carry the configuration.
- Account for the drives and the second processor. A 12LFF build with two processors is a different power budget from a four-bay entry server, and HPE publishes a Power Advisor for sizing a configuration.
- Adding a second processor adds fans. The -B21 processor kits include two extra fans for that upgrade, and fan redundancy takes a two-processor server to five.
Complete Your DL180 Gen9 Build
Power draw follows the processors and the drive count — see DL180 Gen9 processors and drives before sizing a supply. Also available: DL180 Gen9 memory, storage controllers, networking adapters and rack options, or the full DL180 Gen9 parts listing. Background reading: how to fix excessive fan noise in HPE ProLiant servers. Other models are listed under HPE parts by server model.
DL180 Gen9 Power Supplies FAQ
Can I mix power supplies in a DL180 Gen9?
No. HPE states that all power supplies must be of the same input voltage, output rating and efficiency rating. Non-matching supplies can produce an error message or operational issues.
Do I need a power backplane to add a redundant supply?
Yes. On this server the redundant power input module is mandatorily paired with an RPS power backplane, and each backplane supports up to two modules.
Do the two power modules share the load?
No. HPE documents that redundant AC power input modules do not share power: module 1 is the primary and module 2 is the backup, so the pair provides failover rather than extra capacity.
How efficient are the DL180 Gen9 power supplies?
The 900W AC 240VDC power input module is 80 Plus Gold certified with an efficiency rating of up to 92 percent. The non-redundant 550W supply is 80 Plus Silver at up to 89 percent.
What input voltage does the DL180 Gen9 accept?
A rated line voltage of 100 to 240 VAC at 47 to 63 Hz. The 900W module also supports 240V DC and uses a standard C14 inlet.
How many fans does a DL180 Gen9 have?
Two hot-swap fans on a non-redundant single-processor server and four with fan redundancy. A two-processor server runs four fans non-redundant and five when redundant.
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