Your power bill keeps climbing, but you have no idea what's eating the most energy. Home Assistant energy monitoring gives you real-time visibility into every device, every circuit, every watt.
Your utility bill shows a total. That's it. No breakdown by device, no time-of-day analysis, no way to know if your old fridge is costing you more than everything else combined.
TVs on standby, chargers plugged in, smart speakers always listening. These "off" devices silently drain power 24/7. Most homes waste 5-10% of their electricity on phantom loads alone.
Many energy plans charge more during peak hours. Without real-time monitoring, you can't shift heavy usage (dishwashers, dryers, EV charging) to cheaper off-peak windows.
You installed solar panels, but are you actually using the power you generate? Without monitoring, excess solar goes back to the grid at a fraction of what you pay to buy it back.
Home Assistant's built-in Energy Dashboard tracks consumption, solar production, and costs in real time. All processed locally on your own hardware.
See exactly how many watts each device is pulling right now. Watch your consumption spike when the oven kicks in. Spot that space heater someone left on upstairs.
Smart plugs with energy monitoring let you measure individual devices. Find out whether your gaming PC or your dehumidifier is the real energy hog.
Monitor how much energy your panels generate, how much you consume directly, and how much goes to (or comes from) the grid. Maximize your self-consumption.
Home Assistant supports dynamic energy pricing. It shows exactly what you're spending per hour, per day, per device. Some users report cutting their bills by 15-30% just from visibility.
Get notified when a device uses more power than expected. Automatically turn off phantom loads at night. Run the dishwasher only when solar production is high.
Your energy data stays on your network. No utility company tracking your habits. No third-party app selling your usage patterns. Just you and your data.
You have several options depending on whether you want whole-home monitoring, per-circuit tracking, or individual device measurement.
Devices like the Shelly Pro 3EM or Emporia Vue clamp onto your electrical panel's main feed. They measure total home consumption in real time. The Shelly works 100% locally. The Emporia Vue can be integrated via the HA Cloud integration.
The Emporia Vue 2 monitors up to 16 circuits simultaneously. See exactly how much your HVAC, kitchen, or office circuit pulls. Great for identifying which room costs the most.
Zigbee plugs from IKEA (TRADFRI) or Aqara, Wi-Fi plugs running Tasmota, or Shelly Plugs S. Each one reports the wattage of whatever's plugged in. The most granular approach.
In the Netherlands and Belgium, most smart meters have a P1 port. A simple dongle (like the SlimmeLezer) reads your meter data directly into Home Assistant. Real-time consumption and gas usage, no extra hardware needed.
Run it on a Raspberry Pi, a mini PC, or a Home Assistant Green/Yellow. If you're migrating from Google Home or Alexa, our free scan checks which of your current devices are compatible.
Plug in a CT clamp monitor, connect a P1 dongle to your smart meter, or add smart plugs to individual devices. Home Assistant auto-discovers most of these.
Go to Settings, then Dashboards, then Energy. Assign your sensors to grid consumption, solar production, and individual devices. Home Assistant starts tracking immediately.
Create rules like "notify me if the dryer runs for more than 2 hours" or "turn on the pool pump only when solar production exceeds 2kW." This is where the real savings happen.
You need at least one energy-reporting sensor. The cheapest option is a P1 dongle for your smart meter (around 25 euros). For per-device monitoring, smart plugs with energy measurement start at about 12 euros each. Whole-home CT clamp monitors like the Shelly Pro 3EM cost around 80-100 euros.
Yes, if your meter has a P1 port (common in the Netherlands and Belgium) or supports other local interfaces. The SlimmeLezer, HomeWizard P1, and several DIY ESP32 solutions all feed real-time meter data straight into Home Assistant over your local network.
It depends on your hardware. CT clamp monitors are typically accurate within 1-2%. P1 dongles read the same data your utility uses for billing, so they match exactly. Smart plugs vary by model but most are within 5%.
Absolutely. Most solar inverters (SolarEdge, Enphase, Fronius, Huawei) have Home Assistant integrations. Your inverter reports production data, and the Energy Dashboard shows generation vs. consumption, self-consumption ratio, and grid export.
Yes. Home Assistant supports dynamic tariff integrations (like Tibber, Nordpool, or ENTSO-E). Your dashboard shows actual costs based on real-time pricing, and you can build automations that shift heavy loads to the cheapest hours.
Completely. Home Assistant processes everything locally. Your consumption patterns, device usage, and cost data never leave your network unless you choose to share it. No cloud account required.
Start by checking which of your current smart home devices are compatible with Home Assistant. Our free scan takes less than a minute.