[lucb1e]

Because I find Wh (or kWh or MWh or...) a very weird unit. The Watt is already a "per second" unit, and the appended hour makes it have a double time component in the definition. While a Wh has a simple joule value (3600 if I'm not mistaken) and so it's directly convertible, I still find it more difficult to wrap my mind around. Joules seem like a better unit, but they're not known to people... but maybe you're right and I should have picked that.

[firebacon]

"Adding the hour" doesn't make it have "two time components" -- it makes it have no time component.

The joule is a unit of ENERGY.

The watt is a unit of {WORK,POWER}. Confusingly, the germanic languages use "Work" for the concept ("Arbeit" in DE or "Arbeid" in NL), but in English it is "Power". Power means transfer of ENERGY over TIME. Specifically, the Watt it is defined as one Joule per second.

So Watts are a unit of POWER. And POWER=ENERGY/TIME. Note that this is a divison, not a multiplication!

So what do you get by multiplying a Watt by a unit of time (in this case hours)?

  > We're multiplying: WORK * TIME  [Watt * Hour]
  > Which is: (ENERGY/TIME) * TIME  [(Joule/Second) * Hour]
  > And the result is.....: just ENERGY

As you can see, the Watt-Hour is a unit of energy, just like the Joule. There is nothing weird about it.

Hope that could clear things up -- best greetings from the Netherlands!

[ggg9990]

All over the world, the watt-hour is the unit of electrical power consumption among the general public.

[lucb1e]

I suppose you're right at that: by trying to dig deeper to understand it, I confused myself and stopped using what is the generally accepted standard... I guess I should indeed have used kWh.

[ggg9990]

Hey I don’t mean to pile on you. This is cool work that you did that highlights an important issue.