Best smart plugs for pc power monitoring

If you want to monitor how much power your PC draws, smart plugs with energy monitoring are the simplest starting point. You don’t need to open your case or mess with PSU hardware—just plug in and read the watts. The key is finding plugs that report accurate power data locally, not just through a cloud app.

What matters for PC monitoring

The main thing is real-time power reporting. Some plugs only track on/off state. Others give you voltage, amperage, and wattage. For PC use, you want wattage at minimum—it’s the most practical metric for tracking energy cost and spotting power spikes.

Response speed matters too. If you want to trigger automations when your PC draws over a certain wattage (like killing phantom power when it sleeps), look for plugs that update readings every few seconds, not every minute.

Also consider local connectivity. Plugs that work over Zigbee or Z-Wave integrate directly with Home Assistant without going through cloud servers. That means faster response and no dependency on internet uptime.

Recommended plugs with power monitoring

Eve Energy

The Eve Energy is a Matter-over-Thread plug with built-in power monitoring. It reports real-time wattage and accumulated energy to Home Assistant via local Thread connectivity. The trade-off is you need a Thread border router (Home Assistant Green, Apple HomeKit hub, or a Thread-capable device). If you already have one, this is a solid pick. Accuracy is decent for the price.

Shelly Plus Plug S or PM Mini

Shelly Plus Plug S and Shelly Plus PM Mini Gen3 are Wi-Fi plugs that work locally with Home Assistant—no hub needed. They report power consumption and integrate via the Shelly integration or MQTT. The PM Mini is smaller if space is tight. The trade-off is they rely on your Wi-Fi network, so ensure your PC setup is on a stable network segment. They support auto-off timers and power thresholds, useful for killing power to peripherals when the PC sleeps.

HomeWizard Energy Socket

The HomeWizard Energy Socket is a Dutch brand plug with accurate power monitoring and local API access. It works with Home Assistant via discovery and reports detailed consumption data. One trade-off: it’s bulkier than other options. If you need the accuracy and want the extra data (voltage, amperage, power factor), it’s worth the space.

TP-Link Kasa KP125M

The TP-Link Kasa Smart Plug Mini KP125M is a Matter-compatible plug with energy monitoring. It’s widely available and affordable. The trade-off is that while it supports Matter, the power monitoring data may not be fully exposed in all Home Assistant setups depending on how you integrate it. For local-only without cloud, you may need to use the Kasa integration rather than Matter, which can require keeping the cloud connection for initial setup.

The Hubitat and HomeKit angle

If you’re on Hubitat, the Aeotec Smart Home Hub works with Z-Wave plugs that report power. Zooz makes several Z-Wave smart plugs with energy monitoring—check the Zooz ZEN04 800LR Smart Plug and Zooz ZEN05 Outdoor Smart Plug for options that work with Hubitat’s local platform.

For Apple HomeKit users, Eve Energy integrates natively and reports power data to HomeKit. It’s the easiest path if you’re in the Apple ecosystem and want energy tracking without a separate hub.

Practical setup tips

Plug your PC’s power strip into the smart plug if you want to monitor your entire setup at once, or use individual plugs for the PC, monitor, and peripherals separately. Individual monitoring gives you more granular data—you can see how much the monitor draws versus the tower.

In Home Assistant, use the Power entity from your plug to create sensors for daily/weekly/monthly energy. The integration will typically expose a sensor.power entity. From there, you can build a dashboard card or set up automations like “turn off this plug when power drops below 5W for 5 minutes” to kill vampire power.

Watch out for plug placement. Some smart plugs are bulky and may block adjacent outlets on a power strip. The Shelly PM Mini is compact; the HomeWizard Energy Socket is not.

Quick verdict

For most Home Assistant users, the Shelly Plus Plug S or PM Mini gives the best balance of local control, power monitoring, and price—no hub required, works over Wi-Fi. If you want Matter/Thread and already have a border router, Eve Energy is the pick. For maximum accuracy and local API access, the HomeWizard Energy Socket delivers but is larger.