Comment by rokkamokka
9 hours ago
Rather you would say it draws 5 watts. If someone is interested in draw over a period, e.g. over one hour, you'd say it used 5Wh in that period.
9 hours ago
Rather you would say it draws 5 watts. If someone is interested in draw over a period, e.g. over one hour, you'd say it used 5Wh in that period.
> If someone is interested in draw over a period, e.g. over one hour, you'd say it used 5Wh in that period.
Wh per hr? Let's just cut through the confusion and say it draws (J/s)Hr / Hr. :P
More seriously, if you are interested in energy the "correct" SI unit is J although in electrical applications [k/Mega/Giga]Whr is common. If you are interested in energy draw over a period, aka power, the "correct" and common unit is W. While 5 Wh per hour might seem simpler, it is equivalent to say this thing draws as much energy per hour as a device that that draws 5W would draw over one hour - needlessly redundant.
In the offgrid world we look constantly at batteries and they often express themselves in Wh. So it is a habit to measure anything else that way to avoid confusions.