HPE ProLiant ML150 Gen9 Power Supplies
Genuine HPE power supplies and redundancy hardware for the HPE ProLiant ML150 Gen9, new and refurbished. Two rules govern every order here: mixing supplies in one server is not supported, and on this chassis redundancy comes from a power backplane rather than simply from a second supply.
ML150 Gen9 Power Supply Specifications
- Entry supply: a 550W unit at 80 Plus Silver, rated up to 89% efficiency, delivering 550W at both 100 VAC and 200 VAC
- Redundant option: 900W AC 240VDC power input modules at 80 Plus Gold, rated up to 92%, mounted on a redundant power supply backplane that holds up to two modules
- Failover, not load sharing: the two input modules do not share power — module one is the primary and module two is the backup
- Input: 100 to 240 VAC at 47 to 63Hz; a 550W configuration draws 6.7A at 100 VAC or 3.3A at 200 VAC and dissipates up to 2201 BTU/hr
- Mixing: not supported — every supply in one server must match on input voltage, output rating and efficiency rating, or the server reports errors
- Cooling: two non-hot-plug, non-redundant system fans on a single-processor server and three on a two-processor server, the third shipping with the second processor kit
- Cord: a six-foot IEC C-13/C-14 jumper cord ships with each standard AC power supply option kit
On a 100–127V circuit this server is capped at 550W whichever supply is fitted. The 900W AC 240VDC module only delivers its rating on a 200–240V feed, and a redundant pair is rated to 800W rather than 900W because the modules run as primary and backup instead of sharing the load.
How Much Power Does This Tower Actually Get?
| Configuration | At 200–240 VAC | At 100–127 VAC | Redundancy |
|---|---|---|---|
| 550W entry supply | 550W | 550W | None |
| One 900W input module on the backplane | Up to 900W | Up to 550W | None |
| Two 900W input modules on the backplane | Up to 800W | Up to 550W | Primary and backup |
The middle column is where towers get caught. A 900W module on a 208–240V feed delivers its rating, but the same module on a 100–127V office circuit is capped at 550W — the same figure as the entry supply, for a good deal more money. Adding the second module for redundancy also costs 100W off the top at high line, because the pair is rated to 800W rather than 900W. For a two-processor ML150 Gen9, HPE recommends the 900W option outright and points at its Power Advisor for anything unusual.
Choosing the Right ML150 Gen9 Power Supply
- Read the label on the installed unit first. Input voltage, output rating and efficiency rating all have to match, so the supply already fitted is the specification — two supplies of the same wattage are still a mismatch if their efficiency grades differ.
- Redundancy is a backplane, not a spare supply. A second input module only works on the redundant power supply backplane; a server built around the single entry supply has nowhere to put one.
- Check the wall before the wattage. On a 100–127V circuit this server cannot draw more than 550W whichever supply is fitted, so the high-output option only pays back on a 200–240V feed.
- Size to the processor count. HPE recommends the 900W option for any two-processor configuration and the entry supply for lighter single-processor builds.
- The third fan is not a power part. A two-processor tower runs three system fans, and the third ships with the processor kit rather than with the supply.
Complete Your ML150 Gen9 Build
Power draw follows the processors and the drive count — see ML150 Gen9 processors and drives before sizing a supply. Also available: ML150 Gen9 memory, storage controllers and networking adapters, or the full ML150 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.
ML150 Gen9 Power Supplies FAQ
Can I mix power supplies in an ML150 Gen9?
No. HPE states that all power supplies in one server must match on input voltage, output rating and efficiency rating. Non-matching units can produce an error message or operational problems.
How do I make an ML150 Gen9 redundant?
With the redundant power supply backplane and a second 900W AC 240VDC power input module. Each backplane holds up to two modules, and they run as a primary and a backup rather than sharing the load.
How much power does the 900W supply actually deliver?
Up to 900W on a 200 to 240 VAC feed with a single input module fitted, or up to 800W with two modules installed. On a 100 to 127 VAC feed the ceiling is 550W either way.
What wattage does an ML150 Gen9 need?
HPE recommends the 900W option for any two-processor configuration and offers the 550W entry supply for lighter single-processor builds. The HPE Power Advisor sizes an unusual configuration exactly.
What is the difference between the 550W and 900W supplies?
Efficiency and redundancy as much as output. The 550W unit is 80 Plus Silver rated up to 89% and is non-redundant; the 900W AC 240VDC module is 80 Plus Gold rated up to 92% and can be doubled up on a redundant backplane.
How many fans does an ML150 Gen9 have?
Two non-hot-plug, non-redundant system fans on a single-processor server, and three on a two-processor server. The third fan ships with the second processor kit.
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