Small wind / Buyer questions
Application integration
Can a security camera's daytime power measurement represent its overnight demand?
The short answer
Not necessarily. Night operation can enable infrared illumination, while cold conditions can enable heaters or other functions absent during a daytime reading. The relevant power depends on the exact camera and configured service. A measured daytime input is useful evidence for that state, not a complete overnight or worst-condition supply requirement.
Read the conditions behind typical power
Obtain the camera's actual datasheet and configuration. Axis explicitly distinguishes typical and maximum scenarios, including whether IR and heaters are enabled. Do not transfer another camera's measured difference or assume every camera contains those features. Record resolution, streams and any powered accessories relevant to the stated power boundary.
Match night service to the supply boundary
Determine whether IR is integrated or supplied separately and whether input is measured at the camera or upstream PoE switch. Include cable and switch losses consistently, without adding device input again to a complete upstream meter. A camera's lower-power mode can change available functions; the owner must accept the resulting surveillance service rather than select it solely to fit renewable output. Preserve the reported measurement boundary as well.
Preserve the particular datasheet's definition of typical power. An older typical figure and a newer figure explicitly excluding IR or heaters may describe different scenarios rather than a genuine efficiency improvement.
Build a condition-linked load case
Use supported night and environmental states alongside the site's expected operation and required recording windows. Keep a worst-condition capacity check separate from annual energy, since maximum functions may not run continuously. Provide state evidence and the actual PoE/DC interface with the wind enquiry. Wind may contribute at night, but its annual forecast does not guarantee illumination or camera availability during a particular event. No MARSTON surveillance-control capability, detection performance or camera compatibility is established by the general power comparison.
Sources
- Axis white paper: typical/max camera power depend on enabled IR, heating and other functions
- Cisco: PoE device negotiation, port allocation and switch power budget
Examples are illustrative. Confirm product-specific performance, compatibility and supply scope in the applicable documents.