Did the math before buying anything

Spent the evening with a spreadsheet instead of a shopping cart. Every device on the bench got a line: watts, hours, watt-hours a day.

The surprise was the OptiPlex. One reused office desktop pulls about 40 W, around 960 Wh a day, almost ten times everything else on the list combined. It’s still the plan for the server, but now I know exactly what it costs to keep it awake. The full working is in the library: a solar server’s power budget.