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PoE budget

PoE budget is the total power a PoE switch, NVR, or injector can provide to connected devices. It helps show whether the system has enough power for its cameras and accessories.

What PoE budget means

A PoE budget is the total amount of electrical power a PoE device can supply across its powered ports. It is usually stated in watts and may apply to a PoE switch, an NVR with built-in PoE ports, or another power-sourcing device.

The budget is shared across connected devices. It is different from the maximum power available from one port. A product can have several PoE ports but still have a limited total budget for all connected cameras and accessories.

Why it matters for security cameras

PoE lets a network cable carry both data and power to a compatible security camera. The PoE budget helps indicate whether the switch or recorder can power the intended group of devices at the same time.

This matters most when a system has multiple cameras, cameras with higher power requirements, or other powered network equipment. If the total demand exceeds the available budget, the product may not be suitable for that planned setup. The product page still needs to identify the relevant power limits before a meaningful comparison can be made.

What the label does not tell you

A listed PoE budget is a capacity figure, not a quality rating. A larger number does not by itself prove better video performance, network performance, reliability, or camera compatibility.

Likewise, a product marked PoE does not prove that every PoE power class is supported. The label may not identify the supported standard, per-port limit, or how power is allocated across ports. PoE budget also does not describe Ethernet bandwidth, recording capacity, night vision, or image quality.

The available product context does not provide aggregated PoE-budget examples, so no site-wide wattage comparison can be made here. If a listing omits a total watt figure, its available shared power remains unknown.

What to check on a product page

Look for:

  • The total PoE budget, normally shown in watts
  • The maximum power available per port
  • The listed PoE standard or power class, if provided
  • The number of PoE ports and whether the budget is shared
  • The power requirements of the intended IP camera or other connected device
  • Whether the product is a PoE switch, PoE-capable NVR, or PoE injector

Nearby concepts include per-port power, PoE class, PoE switch, PoE injector, NVR, and IP camera. These terms describe related parts of a powered security-camera network, but they are not interchangeable with the total PoE budget.

Relevant guides

PoE Switch Size for 8 Security Cameras

For eight PoE cameras, start with at least eight PoE-capable ports, then verify the switch’s total PoE budget, per-port limits, uplink capacity, and cable layout. This guide shows how to size power and bandwidth separately and avoid common installation mistakes.

Read guide