How do I choose PoE power for a wireless access point?
Match the access point’s required power method to the switch or injector, then check per-port power and the total switch budget. Confirm the Ethernet speed and included accessories. Passive PoE is not interchangeable with every standards-based PoE device.
Power over Ethernet can carry network data and power along one Ethernet cable, which is useful when an access point is mounted away from a mains socket. The important part is choosing a power source that matches the device.
Check these four things in order
- The access point’s power method. Read the exact model’s specification for PoE requirements or a supported DC adapter.
- The port’s capability. Confirm that the chosen switch port or injector provides the required power method and sufficient power.
- The total budget. Several powered devices share the switch’s available PoE budget.
- The box contents. Confirm whether an injector, mains lead or power adapter is included with the particular version you are buying.
PoE labels are not interchangeable
You may see IEEE 802.3af, 802.3at and 802.3bt, often called PoE, PoE+ and higher-power PoE variants. Check the actual standard and supported power level rather than relying on the word “PoE” alone.
Some equipment uses passive PoE, which supplies power without the same negotiation as standards-based equipment. Match voltage, polarity and supported devices explicitly. Do not connect an unknown powered output to a computer or other ordinary Ethernet device.
Ubiquiti explains the distinction and its own adapter behaviour in PoE Availability and Modes. Consult the documentation for the specific injector as well as the access point.
A switch can have enough ports but insufficient power
Count every device that will draw power: access points, cameras, phones and anything else sharing the switch. Use the manufacturers’ maximum power requirements when planning, check how the switch allocates power and leave capacity for the intended configuration.
As an illustration, two devices each rated at 13W represent 26W of device consumption. That arithmetic alone does not approve a switch: cable loss, power allocation, per-port limits and the switch’s published budget still matter. Some switches also offer different budgets with different power supplies.
An injector may be useful for one additional device
If your existing switch has no suitable PoE output, a compatible injector can add power between the switch and the access point. Check the data rate too. A Gigabit injector in a faster Ethernet path can limit the wired connection.
Check which socket is data-in and which carries power to the device. Installation should follow the manufacturer’s instructions, including cable and environmental requirements.
Two examples show why the exact model matters
Ubiquiti lists the U7 Lite at up to 13W with a 2.5GbE network interface. TP-Link’s EAP610 documentation lists 802.3at PoE support and DC power, with specifications and package contents that should be checked against the hardware version. Read the U7 Lite specifications and EAP610 documentation before selecting a power source.
Put the complete connection on your list
A practical purchase list includes the access point, a compatible power source if needed, suitable Ethernet cabling and the required mounting parts. Configuration or controller requirements are separate from powering the device.
Browse Ubiquiti switches, Ubiquiti accessories and Ethernet patch leads. For several access points, send us the existing switch model and your planned devices so a quote can cover the whole requirement.
Common questions
Does every Ethernet switch provide PoE?
No. Check whether the exact model and selected port provide power, and which PoE standard and power level they support.
Is an injector always included with an access point?
No. Check the package contents for the exact model, region and hardware version.
Can I use a passive PoE injector with any access point?
No. The device must explicitly support the injector’s power characteristics. Check the manufacturer’s documentation before connecting it.