[worldsayshi]

I tried to look up human wattage as a comparison and I'm very surprised that it lands around the same ballpark. Around 145W as a daily average and around 440W as a an approximate hourly average during exercise.

I thought current gen robots would be an order of magnitude less efficient. Maybe I'm misunderstanding something.

[BobbyJo]

Electric motors are very energy efficient. I believe they are actually far more efficient on a per-joint movement basis, and the equivalence between us and them is largely due to inefficient locomotion.

Where we excel is energy storage. Far less weight, far higher density.

[themafia]

I happen to have an envelope handy:

2000 kilocalorie converts to 8.3 megajoules. This should be the amount of energy consumed per day.

8.3 megajoules / 24 hours is 96 watts. This should be the average rate of energy expediture.

96 watts * 20% is 19 watts. This should be the portion your brain uses out of that average.

96 watts * 24 hours is 464 watthours. This should be the average amount of energy your brain uses in a day.

This is why I've never found "AI" to be particularly competitive with human beings. The level of energy efficiency that our brains operate at is amazing. Our electrical and computer engineering is several orders of magnitude out from the achievements of nature and biology.

[ZiiS]

Calculate how much energy needs to be input into acriculture and transport to provide that wattage.

[themafia]

To be fair we'd have to consider how much of this same secondary energy would be required to build, operate and maintain the power grid. The grid itself is not 100% efficient either so we'd need to calculate how much power is directly wasted every single day just in inserting and extracting power from those overhead lines.

That's way off the envelope though.

[lm28469]

We do a whole lot of things a robot doesn't have to do, like filtering blood, digesting, keeping warm.

[worldsayshi]

Body maintenance.

[LtdJorge]

Every hardware piece of such a robot can do a few things. Our body parts do orders of magnitude more, including growing and regeneration.