Home device power use
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Computers
tl;dr:
- Laptops: Assume 20-40W in regular use, idling at 10W with things dialed down
- You can estimate this pretty well by the power adapter.
- Desktops: Assume 150W or more, maybe idling around 100W (can be much less, if specialized)
- counting basic monitors (larger and brighter may add more)
- even most gaming machines don't go much over 400W when working hard