Match the exact camera to Reolink’s power table before buying a PoE injector or switch. Reolink specifies active PoE and distinguishes models that require different standards. A listing that says only “48 V” does not establish that an injector negotiates power or that it meets your camera’s requirement.
Separate one camera from a multi-camera quote
For one run, write down the camera model and its required standard, then compare that against the injector’s documentation. Skip passive injectors for these Reolink cameras. For a switch, check the required standard on the intended port and the switch’s total power budget. The number of Ethernet sockets is not a measure of how many cameras can be powered at once.
Do the arithmetic before buying more ports
If a hypothetical switch has a 60 W shared budget and four hypothetical cameras are rated at 18 W each, the sum is 72 W. Four ports do not solve that shortfall. Use your actual camera ratings and allow for any additional powered devices. Put cabling, the injector or switch, and any recorder on separate lines; video compatibility is a different check from power. Confirm the model and required power before running the final cable route.
Source: manufacturer’s current instructions. Related: check recorder compatibility separately.
