PCWattVault
A free real-time PC power consumption monitor for Windows: live watts and electricity cost, per-component breakdown, your own tariff and a permanent local history.
A free real-time PC power consumption monitor for Windows: live watts and electricity cost, per-component breakdown, your own tariff and a permanent local history.
This page is designed to help you find out whether PCWattVault is good and if it is the right choice for you.
Watts are a number. Money is an answer. PCWattVault turns the power your Windows PC draws into what it adds to your electricity bill, priced the way your utility prices it.
It records quietly in the background, so you see which hours, parts and apps cost the most, and where the month will land.
GPU power comes from the card's own sensor. CPU power starts as an estimate marked "~" and is fully measured with the free LibreHardwareMonitor alongside. A TP-Link Tapo P110/P115 smart plug (or a Kasa plug, as an experiment) adds true wall readings and calibrates the model. Laptops on battery are metered from the battery itself. A reading no part could draw is left out, and the app says so.
No account, no cloud, no telemetry. Your history is plain JSON on your disk, and a backup survives an uninstall.
Free from the Microsoft Store, in 17 languages. Early adopters get every Pro feature free, forever.
Listed in
Priced like your bill
Day/night and peak windows, tiers, seasons, solar hours and demand charges in any currency, or your country's average price to start.
Measured or estimated
Every figure says where it comes from: a GPU sensor, LibreHardwareMonitor, the laptop battery, a smart plug, or an estimate marked "~".
Cost per app over time
Which programs draw the power, what each one cost per day, and how that compares with the week before.
Permanent local history
Hour, day, month and lifetime totals in kWh or money, kept as plain JSON files on your PC.
Month-end forecast
Where this month will land, in ranges rather than fake precision, plus next-month and next-year predictions.
Budget and CO₂ alerts
Windows notifications for power, temperature, daily cost, one app, a monthly budget or a monthly CO₂ limit.
Session cost tagging
Start a session before a gaming night, a render or an AI training run and see exactly what it cost.
Smart-plug calibration
Pair a TP-Link Tapo P110/P115, or a Kasa plug as an experiment, to record true wall power and calibrate the model with one click.
Always-on-top mini window
The live watts and today's cost in a small box above your other windows, borderless and windowed games included. Three looks: solid, glass and text only.
Windows power settings
The power mode, Energy Saver and plan Windows applies, read-only, with every change marked on the live chart and in History.
Most power tools stop at watts. PCWattVault goes on to the bill: it prices every watt-hour with your own tariff, including night rates, tiers, seasons and solar hours, and keeps that history for months, per component and per app. Every figure also says how it was obtained (measured by a sensor, a smart plug or the laptop battery, or estimated and marked "~"), so you always know how far to trust it.
Hardware monitors such as HWiNFO or AIDA64 are excellent at showing what every sensor reads right now, but they do not keep a priced history or tell you what last month cost. Per-app power tools show which program is drawing power, usually as a live view. PCWattVault records continuously and turns both into money over time: what each app cost per day, where the month will land, and an alert before you pass your budget. If you need every voltage and clock speed, keep your sensor tool; PCWattVault is the one that answers to your electricity bill. It installs from the Microsoft Store, updates itself and needs no account.
People who pay their own electricity bill and want to know what their PC adds to it: gamers with power-hungry GPUs, creators who render or encode for hours, people running local AI models, homes on day/night or time-of-use tariffs, laptop users who want their real draw and battery wear, and anyone who leaves a PC or home server on around the clock. No technical knowledge is needed: it works out of the box, and deeper measurement is optional.
PCWattVault began with a simple question: what does this PC actually cost to run? Sensor tools gave watts, the electricity bill gave a monthly total, and nothing connected the two, least of all on a day/night tariff where the same watt costs a different amount at different hours. So tmnetworks.gr, an independent developer in Greece, built the missing link: a recorder that runs in the background, prices every hour with the real tariff, and was checked against smart plugs at the wall. It launched on the Microsoft Store in August 2026 and has been updated frequently since, now in 17 languages.
We have collected here some useful links to help you find out if PCWattVault is good.
Check the traffic stats of PCWattVault on SimilarWeb. The key metrics to look for are: monthly visits, average visit duration, pages per visit, and traffic by country. Moreoever, check the traffic sources. For example "Direct" traffic is a good sign.
Check the "Domain Rating" of PCWattVault on Ahrefs. The domain rating is a measure of the strength of a website's backlink profile on a scale from 0 to 100. It shows the strength of PCWattVault's backlink profile compared to the other websites. In most cases a domain rating of 60+ is considered good and 70+ is considered very good.
Check the "Domain Authority" of PCWattVault on MOZ. A website's domain authority (DA) is a search engine ranking score that predicts how well a website will rank on search engine result pages (SERPs). It is based on a 100-point logarithmic scale, with higher scores corresponding to a greater likelihood of ranking. This is another useful metric to check if a website is good.
The latest comments about PCWattVault on Reddit. This can help you find out how popualr the product is and what people think about it.
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