Explore the guide library · PoE power planning
Check both the per-port capability and the total available budget, using documented device requirements.
A PoE switch has two important power limits: what an individual port can supply and what all active ports can supply together. Counting free sockets alone is not enough when adding access points, cameras or phones.
Build a device inventory
For each powered device, record its required PoE standard, documented maximum or allocated power requirement and intended switch port. Use the exact model’s datasheet. A typical consumption figure may exclude features such as a camera’s heater or infrared illumination.
Check the individual port
Confirm that the port supports the required standard and power class. Some switches provide higher power on only selected ports. A large overall budget does not make every port capable of supplying the same amount.
Add the appropriate requirements
Use the switch vendor’s allocation method and account for the source-versus-device distinction. As a simple planning example, four devices requiring 20 watts of switch allocation each need 80 watts before any additional devices or headroom. This is arithmetic, not a universal camera specification.
Review the power supply option
Some switch variants or supplied adapters have different total budgets. Check the exact package being purchased, not just the shared model-family name. Confirm the budget stated for the installed power supply.
Plan for simultaneous demand
- All cameras entering night mode.
- Access points starting after a power interruption.
- Higher-power features enabled later.
- A realistic number of future additions.
NETGEAR documents that budget exhaustion can cause power to be withheld according to port priority. Read the behavior for your specific switch so an important device is not unexpectedly affected.
After installation, compare monitored power with the plan during representative operation. Keep the inventory updated when equipment changes. A sound budget combines compatible ports, sufficient total capacity and known peak requirements, rather than assuming that low daytime consumption guarantees reliable operation under every condition.
Sources and editorial notes
Sources checked 8–9 October 2026. Independent guidance and original illustrations; product comparisons use published specifications rather than hands-on benchmarks. Check the exact model, revision and regional documentation before changing settings.
- NETGEAR: PoE standards, per-port power and total budget
- Axis: typical and maximum camera power consumption