Hi Product Hunt! I'm Stamatis, and I built PCWattVault because I wanted the number that actually matters: not watts, but what my PC adds to the electricity bill, priced with my real day/night tariff. I measured my own desktop at the wall for two months. Running around the clock it comes to about €547 a year, and two thirds of that is just idle draw. PCWattVault now does that quietly in the background for anyone: live watts, which apps and parts use them, and an honest month-end forecast. A few things I cared about: • It always says whether a number is measured or estimated ("~"). • Everything stays on your PC: no account, no cloud, no telemetry. • On laptops it measures from the battery itself. Just shipped 1.1: an always-on-top mini window (also over borderless games), Windows' power settings on the live chart, and Kasa smart plugs as an experiment. It's free, and early adopters keep every Pro feature free, forever. I'd love your feedback: what would you track first, your gaming sessions, your work machine or a home server?

PCWattVault

See what your Windows PC really costs in electricity

See what your Windows PC really costs in electricity