Translations:Remorque génératrice solaire - Système électrique/25/en

How to know the power of a device?

-Look on the manual or the tag on the device itself. If you only have the voltage U (In Volts, V) and the intensity I (In Amps, A), you can calculate it: P=U x I

-Get a Wattmeter (~10.73 $USD). It is connected between the socket and the device and tells you precisely its power.

{{Warning l Certain devices do not consume the same quantity of energy all the time. For example, even if a refrigerator is permanently plugged in, it does not consume energy until the interior temperature passes a certain level.