Every guide here answers a question a buyer asks before they contact a supplier: how long will it run, how do I size it, what breaks in the field. Written from site data, with the assumptions printed next to the answer.
The method, the two numbers you need, and a table of runtimes from 5 W to 2 kW — with the derating that most datasheets leave out.
Read the guide Selection · 8 minPoE budgets, NVR load and why the switch, not the camera count, decides the runtime. Worked examples for 4, 8 and 16 cameras.
Read the guide ToolLoad in watts, hours needed. It returns a model and a runtime range, not a datasheet.
Open the calculatorMore guides are being written on temperature derating, UN38.3 for export and ride-through in control cabinets. If a question is not covered, ask it — the answer usually becomes the next guide.
Send the device model or the adapter rating. You get a runtime figure and the model that delivers it, usually the same working day.