Smart home energy technology has evolved beyond basic smart thermostats. Today's devices provide real-time visibility into exactly where your energy goes — and the ability to automatically reduce waste without sacrificing comfort.
Whole-Home Energy Monitors
How They Work
Whole-home monitors clamp onto the main electrical lines in your breaker panel. Sensors measure current flow in real-time, transmitting data to an app that shows:
- Total household electricity consumption
- Real-time watt usage
- Historical trends (hourly, daily, monthly)
- Appliance-level disaggregation (some models)
- Cost tracking based on your utility rate
Top Devices (2026)
| Device | Price | Features | Rating |
|---|---|---|---|
| Sense Energy Monitor | $300 | AI appliance detection, solar monitoring, real-time alerts | 4.3/5 |
| Emporia Vue 2 | $160 | 16 circuit monitors, solar compatible, affordable | 4.5/5 |
| Neurio (Generac) | $250 | Whole-home + solar, utility integration | 4.2/5 |
| Eyedro Home Solar | $200 | Real-time monitoring, solar tracking | 4.1/5 |
What They Reveal
- Phantom loads: Devices consuming power when "off" (typically 5-10% of a home's electricity)
- Energy hogs: Which appliances use the most power (often the HVAC, water heater, and dryer)
- Usage patterns: When you use the most energy and opportunities to shift demand
- Solar performance: How much your panels produce vs. what you consume
Smart Thermostats
Smart thermostats are the single most cost-effective smart energy device:
| Device | Price | Annual Savings | Payback |
|---|---|---|---|
| Ecobee Premium | $250 | $100-$150 | 1.5-2.5 years |
| Google Nest Learning | $250 | $100-$150 | 1.5-2.5 years |
| Honeywell Home T9 | $200 | $75-$125 | 1.5-3 years |
| Amazon Smart Thermostat | $80 | $50-$100 | Under 1 year |
Energy Savings Mechanisms
- Occupancy detection: Automatically adjusts when you leave and returns to comfort before you arrive
- Learning algorithms: Adapts to your schedule and preferences over time
- Remote control: Adjust temperature from anywhere (prevent heating/cooling an empty home)
- Utility demand response: Some models participate in utility programs for additional bill credits
- Room sensors: Ecobee and some models include remote sensors for multi-room optimization
For more on how these devices work, see our energy audit preparation guide.
Smart Plugs and Power Strips
What They Do
Smart plugs sit between your device and the outlet, allowing:
- Remote on/off control via app
- Scheduled operation (turn off at bedtime, on at wake-up)
- Energy usage monitoring per device
- Automation integration (turn off when you leave)
Top Smart Plugs
| Device | Price | Energy Monitoring | Best For |
|---|---|---|---|
| TP-Link Kasa EP25 | $15 | Yes | Best overall |
| Amazon Smart Plug | $25 | Basic | Alexa integration |
| Eve Energy | $30 | Yes | HomeKit/Apple users |
| Wemo Smart Plug | $20 | Yes | Google Home |
Best Uses for Smart Plugs
- Entertainment centers: TV, gaming console, sound bar ($50-$100/year vampire load)
- Home office: Computer, monitor, printer ($40-$80/year vampire load)
- Holiday lights: Schedule on/off automatically
- Space heaters: Safety timer and remote shutoff
- Coffee makers: Start brewing before you get up
Smart Power Strips ($30-$60)
Smart power strips go beyond individual plugs:
- Master/satellite control: When the main device turns off, satellites follow
- Timer outlets: Individual timers per outlet
- Always-on outlets: For devices that should never turn off (DVR, router)
- Energy monitoring: Track consumption per outlet
Energy Management Apps
Utility Company Apps
Most utilities now offer apps that provide:
- Real-time usage data (if smart meter equipped)
- Bill projections
- Usage comparison to neighbors
- Rate plan optimization recommendations
Third-Party Apps
| App | Cost | Features |
|---|---|---|
| Sense | Free (with monitor) | AI appliance detection, alerts, goals |
| Emporia | Free (with monitor) | Circuit-level tracking, solar, time-of-use |
| EnergySage | Free | Solar comparison, energy savings marketplace |
| JouleBug | Free | Gamified energy saving challenges |
Putting It All Together: A Smart Energy Stack
Basic Stack ($200-$400)
- Smart thermostat ($80-$250): 8-12% HVAC savings
- 5 smart plugs ($75-$150): Eliminate vampire loads
- Expected savings: $150-$300/year
Advanced Stack ($500-$1,000)
- Whole-home energy monitor ($150-$300)
- Smart thermostat with room sensors ($250)
- Smart plugs for major loads ($100-$200)
- Smart LED bulbs in high-use areas ($50-$100)
- Expected savings: $300-$600/year
Premium Stack ($1,000-$3,000)
All of the above plus:
- Smart water heater controller ($150-$300)
- Smart EV charging (if applicable) ($500-$1,500)
- Home battery integration for time-of-use optimization
- Expected savings: $500-$1,200/year
Frequently Asked Questions
Do smart home devices actually save money?
Yes. Energy Star certifies that smart thermostats save an average of 8% on heating and cooling (approximately $50-$150/year). Whole-home monitors, by creating awareness and enabling behavior change, save an additional 5-15%.
Can I install a whole-home energy monitor myself?
The Emporia Vue 2 is designed for DIY installation and clamps around the main electrical lines inside your breaker panel. However, if you are not comfortable working near live electrical circuits, hire a licensed electrician ($100-$200 for installation).
What is the best smart thermostat for energy savings?
The Ecobee Premium and Google Nest Learning Thermostat are the top choices, both saving $100-$150/year. The Amazon Smart Thermostat at $80 offers the best value if budget is tight.
Do smart plugs work with all devices?
Smart plugs work with any device that plugs into a standard outlet. However, they should NOT be used with high-wattage devices that exceed the plug's rating (typically 15 amps/1,800 watts). Check the plug's specifications before connecting space heaters or other high-draw appliances.
How do I know if smart home energy monitoring is worth it for my house?
If your monthly energy bill exceeds $150 and you are unsure where the energy goes, a whole-home monitor ($150-$300) will pay for itself within a year. For smaller bills, start with a smart thermostat and smart plugs. A professional energy audit can identify whether smart devices or physical improvements (insulation, air sealing) will save you more.
Related Reading
- How to Choose a Home Energy Auditor: Certifications and Questions
- How to Prepare for a Home Energy Audit
- DOE Home Energy Score Explained
- Energy Disclosure Laws at Home Sale
- Energy Star New Home Certification
-- The Energy Audit Finder Team