Do Smart Home Devices Use a Lot of Electricity?

Smart home devices are always on — always listening, always connected. Homeowners in Toronto and the GTA worry that dozens of always-on devices are quietly running up their electric bill. The reality is much smaller than most people expect, but not zero. This guide breaks down the real electricity use of common smart home devices and where the actual power savings and costs land.

Do smart home devices use a lot of electricity?

Individually, smart home devices use very little electricity. A smart plug draws 0.5–2 watts in standby. A smart bulb draws 0.3–0.6W in standby (much less than the 60W or so when on). A smart speaker like Amazon Echo draws 2–3W idle. A hub draws 1–5W. Even a home with 50+ smart devices adds maybe $30–$80 CAD per year to the electric bill in Ontario. That is offset many times over by smart-lighting savings, smart-thermostat HVAC savings, and load-scheduling on time-of-use rates.

Standby draw of common smart devices

• Smart plug (Wi-Fi): 0.5–2W standby.
• Smart plug (Zigbee/Z-Wave): 0.3–1W standby.
• Smart bulb (idle): 0.3–0.6W.
• Smart switch: 0.3–1W.
• Amazon Echo Dot: 1.5–2.5W idle.
• Google Nest Hub: 2–4W idle.
• Wi-Fi router: 5–12W (existing regardless).
• Zigbee/Thread hub: 2–5W.
• Smart thermostat: 1–2W.
• Smart doorbell (wired): 3–6W.
• Smart security camera (Wi-Fi): 3–10W each.

Actual annual cost math

Sample GTA home with 50 smart devices averaging 1.5W standby draw each:

• 50 devices × 1.5W = 75W continuous.
• 75W × 24 hours × 365 days = 657 kWh/year.
• At Ontario average ~$0.11–$0.15 per kWh = ~$70–$100 CAD/year total for all standby.

Compare to a single always-on 60W incandescent bulb, which is 526 kWh/year for one bulb.

Where smart devices save electricity

• Smart thermostats. Schedule-based heating/cooling saves 8–15% on HVAC bills.
• Smart lighting. Automatically off in unoccupied rooms, dimmed in evenings, LED efficiency gains.
• Smart plugs for phantom loads. Kill standby power to TVs, sound systems, and computers when not in use.
• Time-of-use scheduling. Run high-load appliances (dishwasher, EV charger) during Ontario off-peak hours.
• Automated blinds. Control sun exposure for passive heating/cooling savings.

For a typical GTA home, smart-thermostat savings alone can exceed the cost of running all standby smart devices combined.

Watch out for these power hogs

• Old-generation Wi-Fi cameras. Can draw 10W+ each; five cameras = $50–$60/year.
• Wi-Fi hubs that duplicate router functions. Unnecessary bridges add draw.
• Smart displays with always-on screens. Dim them or set them to sleep.
• Cheap smart plugs. Some no-name brands draw 3–5W idle vs 1W for major brands.
• Legacy smart-home computers or servers. Home Assistant on a full desktop can draw 40–80W. Use a Raspberry Pi or mini PC instead.

Actual electricity savings you can measure

Ontario smart-home users typically see:

• $150–$300/year HVAC savings from smart thermostats.
• $50–$100/year lighting savings from LEDs + smart control.
• $50–$100/year from killed phantom loads.
• $100–$300/year from EV time-of-use scheduling.

Net effect for most GTA smart homes: modest savings that offset standby draw and then some.

Best practices to minimize smart-home standby draw

• Prefer Zigbee, Z-Wave, Thread, or wired ethernet over Wi-Fi where possible.
• Consolidate hubs rather than one bridge per brand.
• Buy CSA/cULus-certified major brands (better standby efficiency).
• Set smart displays and speakers to sleep at night.
• Use smart plugs to kill entertainment centre phantom loads when not watching TV.

Expert tip from our ESA-licensed electricians

Do not obsess about the 1W standby draw of a smart bulb. In an average GTA home, the biggest electricity hogs are still the fridge, HVAC, water heater, and dryer — not the smart devices. If you are optimizing energy use, spend your attention on the smart thermostat schedule, LED upgrades, and killing phantom loads on entertainment gear. The 50 smart plugs sipping half a watt each are noise in the signal.

Frequently Asked Questions

Do smart bulbs use power when off?

Yes, minimal — typically 0.3–0.6W per bulb for the radio and standby circuit.

Are Wi-Fi cameras big electricity users?

Older cameras yes (10W+). Modern efficient models draw 3–5W.

Does a smart thermostat pay for itself?

Usually within 1–2 heating/cooling seasons through automated scheduling savings.

Are Zigbee devices more efficient than Wi-Fi?

Yes typically. Lower-power radios and mesh network reduce individual device draw.

Should I unplug smart devices when away?

Not necessary. Standby draw is minimal and you lose remote monitoring value.

Related reading from ezsmart.ca

• How Do Smart Plugs Work Without Wi-Fi?
• What Is a Smart Outlet and How Does It Work?
• What Is a Smart Lighting System?
• Why Is My Electric Bill Suddenly So High?
• Should I Add Smart Home Wiring During My Renovation?

Contact us

Planning a smart-home retrofit in a Toronto or GTA home and want the electrical done right? Call ezsmart at 416-838-9006 or use our contact page. An ESA-licensed electrician can pre-wire, add neutrals, and support your smart-home vision.