Huawei storage power supplies and BBUs (86 P/Ns)

AC and DC are two product lines, not two options

Of the 86 rows, 46 are AC-input supplies and 25 are DC-input. The split is not a preference at order time: the input range differs by an order of magnitude (90-264 V AC against a -38 to -75 V DC rail), the connectors differ, and the systems that take one generally do not take the other without a different power shelf.

• AC supplies take a wide-range mains input and are the default in enterprise cabinets.
• DC supplies take a telecom-style negative 48 V rail and are common in carrier and central-office sites.
• A DC-powered system needs DC distribution, breakers and often a different PDU — plan the whole chain.
• Do not convert a system from AC to DC by changing supplies alone.

Power rating is the sizing number

The wattage in the description is the output rating of the module, and it is the number that decides how many modules a shelf needs and whether the configuration survives one module failing. The ratings present in this list are 350 W 1, 600 W 3, 750 W 1, 800 W 2, 900 W 12, 960 W 2, 1200 W 9, 1800 W 2, 1950 W 1, 2000 W 23, 2200 W 3, 3000 W 1.

Two supplies of the same wattage from different generations are not automatically interchangeable. The form factor, the connector and the airflow direction all have to match as well, and the shelf firmware may report an unknown module if the generation is too far apart.

Airflow direction is a hard requirement

Supplies in this list are marked either front-to-back or back-to-front, and the marking is not cosmetic: it describes which way the fan pushes air through the module. In a cabinet where all equipment moves air the same way, fitting one supply with the opposite airflow creates a hot spot that the thermal design never accounted for. In the rows here the split is Front to back 1, Back to front 1.

• Match airflow to the rest of the cabinet, not to the supply you happened to find.
• Front-to-back and back-to-front modules usually carry the same rating and look identical.
• The airflow direction is in the description. Read it before you order two.

Input range and derating

The description carries the operating temperature range and the input voltage window, for example -5 to 55 degrees C at 90-264 V AC. Those two figures define where the module can be deployed, and they are the reason two supplies of the same wattage are not always the same product: a module rated to 50 degrees C delivers less at the top of its range than one rated to 55.

• Check the temperature range against the cabinet’s actual inlet temperature, not the room.
• Output derates with inlet temperature; the nameplate wattage is not available at 55 degrees C.
• Multi-output modules state a combined capacity for the shared rails — read that figure, not the sum.

Battery and BBU parts are a separate maintenance item

17 rows are battery or BBU related. These are consumables with a service life, not fit-and-forget components: a cache-protection battery that has aged out will put the controller into write-through and cut performance long before it reports a hard failure.

• Replace on the calendar, not on the alarm.
• A BBU that has been held in storage for years has been ageing; check the manufacture date.
• Match the battery to the controller generation — the connector and the charge profile differ.

Full part-number list, 86 P/Ns

Input range, output rating and airflow direction are taken from the official description where Huawei publishes them.

Before you order a power supply

• Confirm AC or DC input — this decides the whole power chain, not just the module.
• Confirm the output rating the shelf needs and whether it must survive one module failing.
• Confirm the airflow direction matches the rest of the cabinet.
• Confirm the form factor and connector against the shelf generation.
• For batteries, confirm the manufacture date, not only the part number.

Frequently asked questions

Can I replace an AC supply with a DC one?

No. The input rail, connector and the whole distribution chain differ. It is a system change, not a module swap.

Does a higher-wattage supply work in place of a lower one?

Sometimes, if form factor, connector and airflow match and the shelf firmware recognises it. Confirm before ordering.

Why does airflow direction matter?

Because a module pushing air the wrong way creates a hot spot the cabinet thermal design did not account for. It is a hard requirement, not a preference.

Is the nameplate wattage available at maximum temperature?

No. Output derates with inlet temperature. Size against the derated figure at your cabinet’s inlet temperature.

When should a BBU be replaced?

On the calendar, not on the alarm. An aged battery silently forces write-through before it fails.