[mjan22640]

Joules is the solution to both the problems (the second is that Wh for energy is as silly as speed hours for distance)

[XorNot]

Watt-hours is a perfectly pragmatic unit. Measure instantaneous power and multiply by a common human unit of time. It's easy to compare.

[ben_w]

Part of me is tempted to suggest kilograms as a unit of energy.

428.6 kg relativistic mass-energy equivalent: https://www.wolframalpha.com/input?i=10.7PWh%2F%28c%5E2%29

But then, I am a silly person.

[sbierwagen]

>(the second is that Wh for energy is as silly as speed hours for distance)

This would be a devastating own if a single Joule wasn't exactly equal to a Watt-second.