The best first purchase is usually a compatible smart thermostat if heating or air conditioning is responsible for a large share of your electricity use. Smart plugs are better for measuring and automating individual devices, while energy-monitoring apps help identify waste but do not reduce consumption on their own.
Start with your utility’s usage data and available rebates, then measure the largest controllable loads before buying hardware. The goal is not to make every appliance “smart”; it is to find a meaningful source of consumption, change it safely, and verify the result on your bill.
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What actually drives an electricity bill?
Your bill is usually made up of more than the advertised electricity supply rate. Depending on your utility and tariff, it may include:
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- Energy consumed, measured in kilowatt-hours (kWh).
- Supply, delivery, transmission, and distribution charges.
- Fixed customer charges.
- Time-of-use rates or demand charges.
- Taxes, fees, and other adjustments.
For a realistic estimate, calculate your effective electricity rate:
#1 Best Overall
- Stability Upgrade: Supports Bluetooth or WiFi connection, which is more stable and faster than plugs that can only be connected through WiFi. No disconnection worries, control all your home appliances and devices anytime & anywhere.
- Smart Voice Control: WiFi Plugs Work with Amazon Alexa and Google Assistant, so you can control the smart home devices using simple voice commands. Free hands by using smart plugs and enjoy the funny interactive process. Note: Don't support 5G WiFi.
- Scheduling & Group Controller: Create customized schedules to power your electronic appliances on/off automatically for helping save energy and money. And with a single tough of one button, you can manage multiple smart plugs simultaneously.
- Multiple Safeguards & Small Size: With ETL & FCC certified, the quality of smart plug is assessed. Our product is rated: 10A, 1200W and support 120V. Compact and flexible design can save space, smart home plugs fit for every corner of your room.
- Easy Install and Use: Download the Govee Home App and search for H5083, you can pair smart outlet successfully in minutes without barrier in smart home; share with your family on Govee app via phones so you can enjoy the smart life together.
Effective rate = total usage-based charges ÷ kWh billedExclude fixed charges when estimating the cost of changing a device’s consumption. If your utility uses time-of-use pricing, use the rate applicable when the device operates.
For a continuously operating device:
Annual cost = watts × hours per day × 365 ÷ 1,000 × electricity rateFor a device that cycles, use its average operating wattage and actual operating hours:
Annual cost = average operating watts × operating hours ÷ 1,000 × rateFor example, a 100-watt device running continuously uses 876 kWh per year. At $0.20 per kWh, that is approximately $175 annually. A 5-watt standby load uses 43.8 kWh per year, costing about $8.76 at the same rate. That is why measuring a constantly running entertainment system, network appliance, or dehumidifier is more useful than worrying about a phone charger drawing a tiny standby load.
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1Scan for outdated or missing drivers - takes under a minute2Repair Windows errors before they cause bigger problems3Fix the driver behind crashes, sound loss and screen glitchesBefore installing anything, check your utility portal for daily or hourly usage, seasonal comparisons, high-use alerts, time-of-use information, demand-response programs, thermostat rebates, and home-energy assessments. Federal rebate availability is determined locally, so check your ZIP code and utility territory through the Department of Energy Energy Savings Hub. The Federal Trade Commission’s heating and cooling guidance also recommends checking utilities and local energy offices for audits and incentives.
Use a smart thermostat to reduce heating and cooling waste
Heating and cooling are usually the largest controllable energy loads in a home. ENERGY STAR says almost half of the average American household’s annual energy bill goes to heating and cooling—more than $900 in its national consumer guidance—but climate, equipment, insulation, fuel type, and home size make individual results vary. A thermostat itself uses little electricity; its value comes from controlling equipment that uses much more.
ENERGY STAR-certified smart thermostats must use field data to demonstrate savings. ENERGY STAR’s criteria include at least an 8% reduction in heating runtime and a 10% reduction in cooling runtime at the lower weighted national confidence limit. Those are runtime criteria, not a promise that your total electricity bill will fall by the same percentages.
Rank #2
- SIMPLE TO SET UP WITH ALEXA: Get started in minutes with multiple setup options, including a zero touch experience when you select "Link device to your Alexa account" at checkout
- CONTROL FROM ANYWHERE: Schedule plugged-in appliances like lights or fans to turn on/off automatically, or control them remotely via the Alexa app when you’re away
- COMPACT DESIGN: The plug fits perfectly into 1 socket, leaving remaining sockets and outlets free for use; ideal for multiple appliances like holiday lighting, heaters, fans, lamps, water kettles, coffee makers, and more
- CUSTOMIZE ROUTINES: Schedule your smart plug to turn on/off either at designated times, with a voice command, or even at sunrise and sunset
- NO 3RD PARTY APPS OR HUBS REQUIRED: Set up and manage connected devices directly in the Alexa app; no need for additional smart hubs or 3rd party apps
How thermostat automation can help
- Schedules: Reduce heating or cooling when the home is normally empty or everyone is asleep.
- Occupancy detection: Adjust settings when the system can reliably determine whether people are home.
- Geofencing: Use household location to switch between home and away settings.
- Vacation mode: Maintain safe temperatures during extended absences.
- Remote adjustment: Correct an accidental setting without driving home.
- Energy reports: Review runtime and identify unusually long operation.
- Temperature sensors: Prioritize a representative room rather than relying only on the thermostat’s location.
- Filter reminders: Support routine maintenance, although a reminder cannot repair a failing system or leaky ductwork.
- Demand response: Some utilities offer incentives for allowing brief, controlled adjustments during peak demand.
Configure the thermostat around actual occupancy rather than an idealized routine. Away temperatures should protect pets, plants, plumbing, and humidity-sensitive belongings. Presence detection can fail when someone works from home, sleeps for long periods, or leaves while another household member remains inside.
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Heat pumps need special care
Do not apply generic advice such as “turn the temperature down 10 degrees” to every system. On a heat pump, an aggressive setback may activate auxiliary or emergency electric heat, which can cost more than maintaining a moderate setting. Confirm that the thermostat supports your heat pump, auxiliary heat, staging, and any dual-fuel configuration. Follow the equipment manufacturer’s guidance or have an HVAC professional configure it.
Electric resistance heat can respond well to sensible setbacks, but savings depend on the schedule and the home’s heat loss. Radiant and hydronic systems respond more slowly, so rapid changes may provide little benefit. Zoning, poor insulation, leaky ducts, dirty filters, and failing equipment can also overwhelm any thermostat savings.
Check compatibility before removing the old thermostat
- Identify whether the system has central air conditioning, gas, oil, electric, or heat-pump heating.
- Check for auxiliary or emergency heat, multiple stages, dual fuel, zoning, humidifier, dehumidifier, or ventilator controls.
- Photograph the existing wiring and label each wire before disconnecting anything.
- Confirm whether the proposed thermostat requires a C-wire or an approved power adapter.
- Check the manufacturer’s compatibility tool and utility rebate rules.
- If the wiring or system is unusual, use an HVAC professional rather than guessing.
Most, but not all, smart thermostats need a C-wire or another reliable power source. A missing C-wire can lead to reboots, unreliable Wi-Fi, or incorrect operation. Also verify what happens during an internet outage: a good thermostat should continue its local schedule, but remote features may stop working.
After installation, let the system operate for one or two billing cycles. Compare runtime and weather-adjusted electricity use with a comparable period rather than crediting every bill change to the thermostat. Google’s Nest energy-saving guidance describes features such as Eco Temperatures, presence controls, schedules, and vacation settings; any projected savings should be treated as manufacturer-specific guidance, not an individual guarantee.
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Smart plugs are most valuable when they measure or control a specific load that is frequently forgotten, runs on a schedule, or consumes meaningful electricity. They are not automatically money-saving devices. Savings depend entirely on what is connected and how much operation you eliminate or shift.
Rank #3
- Voice control: Kasa smart plugs that work with Alexa and Google Home Assistant. Enjoy the hands free convenience of controlling any home electronic appliances with your voice via Amazon Alexa or Google Assistant
- Easy set up and use: 2.4GHz Wi-Fi connection required. Plug in, open the Kase app, follow the simple instructions and enjoy
- Scheduling: Use timer or countdown schedules set your smart plug to automatically turn on and off any home electronic appliances such as lamps, fan, humidifier, Christmas lights etc.
- Smart Outlet Control from Anywhere: Turn electronics on and off from anywhere with your smartphone using the Kasa app, whether you are at home, in the office or on vacation.
- Trusted and Reliable: Kasa is trusted by over 6 Million users and being the Reader’s Choice of PCMag 2020. UL certified for safety use. 2-year warranty.
Good candidates for a smart plug
- Entertainment centers, game consoles, speakers, and amplifiers.
- Desktop computers, monitors, and printers.
- Decorative lighting and lamps.
- Fans and some humidifiers or dehumidifiers, if the product instructions permit switching.
- Coffee makers with suitable mechanical restart controls.
- Chargers or seasonal equipment that would otherwise remain energized.
- Small hobby or workshop equipment that can safely be switched.
Use schedules, auto-off rules, or occupancy routines to turn equipment off overnight, during work hours, or after a forgotten period. A switched power strip may be cheaper and simpler when several compatible devices operate together.
Control is not the same as energy monitoring
Some plugs provide only switching, scheduling, and remote control. Others measure watts, kWh, and historical usage. Matter compatibility does not necessarily mean that energy data will appear in every smart-home ecosystem; control interoperability and energy-reporting support can differ by device, platform, firmware, and app.
For example, TP-Link’s Tapo P125M supports scheduling, auto-off, remote control, Matter, and local Matter control, with a stated 15-amp/1,800-watt maximum at 120 volts. Its standard product information does not present it as an energy-monitoring model. The Kasa KP125M, by contrast, is marketed with real-time and historical energy monitoring, scheduling, remote control, and Matter compatibility. Verify the exact model rather than relying on a similar product name.
Smart-plug measurement workflow
- Estimate the device’s wattage and how long it operates.
- Calculate its approximate monthly and annual electricity cost.
- Connect it to an energy-monitoring plug if measurement is needed.
- Record usage for several days, preferably a full week.
- Identify a specific action: an overnight schedule, auto-off rule, replacement, or consolidation onto a switched strip.
- Confirm the appliance restarts safely after power is removed and restored.
- Check the first complete bill after automation.
- Disable the rule if it causes missed routines, equipment problems, overheating, or safety concerns.
Loads that require caution
Do not use a smart plug casually with refrigerators, freezers, medical equipment, aquariums, sump pumps, space heaters, heating equipment, air conditioners, compressors, motors, or anything that must run continuously. Some appliances do not resume operation after power returns; others have startup currents that make a plug’s nominal rating an inadequate guide.
Never overload the plug, use an indoor-rated product outdoors, or use it as a substitute for a required disconnect or electrical repair. Keep the plug ventilated, follow continuous-load instructions, and follow the appliance manufacturer’s restrictions.
Use energy-monitoring apps to find hidden consumption
Monitoring produces information; it creates savings only when the information leads to a safe change in settings, scheduling, equipment, or behavior. There are three useful levels of visibility.
Rank #4
- Stability Upgrade Quick Connection:Supports Bluetooth or WiFi connection.The improved WiFi technology let you quick connection and stay stable,no disconnection worries. Please keep the smart plug connected to your stable 2.4GHz network.(Note: Only 2.4Ghz WiFi)
- Hand-Free Voice Control:Smart plugs that work with Alexa and Googel Assistant. Just give a simple voice command to Alexa or Google Assistant to control your connected home devices. Enjoy the joy of smart home devices.
- APP Remote Control From Anywhere:You also can control your outlet timers anywhere anytime via the APP directly when you are away. Monitor and control connected electrical equipment in your home.The smart outlet plug compatible with GHome APP, Smart Life App and Tuya App.
- Schedules and Timer Function:Easy to set timers and add schedules to connected smart home devices circularly or randomly, making them work as scheduled like auto-off and auto-on to save energy and money. Such as lamps, fan, humidifier, Christmas light timers etc.
- Group Control and Sharing:You can set a group for some wifi smart plugs and control connected appliances with one tap. Also you can share your wifi outlet plug by App with your families and enjoy the smart life together.
Level 1: Your utility app
Begin with the utility portal because it covers the whole home without a hardware purchase. Look for hourly or daily graphs, bill comparisons, high-use alerts, time-of-use rates, demand-response enrollment, rebates, and audit programs. Utility data also helps distinguish a seasonal HVAC problem from a constant base load.
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Plug-level apps can show the cost of an individual appliance, identify standby loads, compare daily usage, and alert you when a device exceeds its normal pattern. Their limitations are equally important: they see only the connected outlet, their cost estimate depends on the rate entered, and cloud outages or Wi-Fi problems may interrupt remote control.
Instantaneous watts are not the same as energy consumed. A 1,500-watt appliance used briefly may cost less over a year than a 100-watt device operating continuously. Focus on kWh over time.
Level 3: Whole-home or circuit-level monitoring
A panel monitor can reveal HVAC operation, electric water-heater cycles, pool pumps, EV charging, electric dryers and ranges, solar production, battery charging, and the home’s base load. It is especially useful when the bill remains unexplained or the important loads do not pass through accessible outlets.
Emporia’s Vue product page lists mains-only and circuit-sensor versions and states manufacturer specifications including ±2% measurement accuracy, less than 3 watts of device consumption, 2.4-GHz Wi-Fi, UL certification, and a one-year warranty. Prices shown there when checked were $99.99 for mains monitoring, $149.99 for mains plus eight branch sensors, and $199.99 for mains plus 16 sensors. These are manufacturer-listed specifications and prices, not guarantees of installation cost or current retail availability.
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Best Value
- Voice control: Kasa smart plugs that work with Alexa and Google Home Assistant. Enjoy the hands free convenience of controlling any home electronic appliances with your voice via Amazon Alexa or Google Assistant
- Easy set up and use: 2.4GHz Wi-Fi connection required. Plug in, open the case app, follow the simple instructions and enjoy. Kasa app reqiured
- Scheduling: Use timer or countdown schedules set your smart plug to automatically turn on and off any home electronic appliances such as lamps, fan, humidifier, Christmas lights etc.
- Smart Outlet Control from Anywhere: Turn electronics on and off from anywhere with your smartphone using the Kasa app, whether you are at home, in the office or on vacation.
- Trusted and Reliable: Kasa is trusted by over 6 Million users and being the Reader’s Choice of PCMag 2020. UL certified for safety use. 2-year warranty.
Solar, batteries, EVs, pool equipment, electric water heating, and resistance heating can make whole-home or circuit monitoring more valuable. Make sure the system distinguishes gross consumption, solar production, battery charging, and net-metered usage; otherwise the graphs may be misleading.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Turn monitoring data into actual savings
Use this loop:
Measure → identify the largest controllable load → change one setting or behavior
→ wait through a comparable period → verify usage and cost → keep, revise, or undoFor each suspected load, ask:
- Is it large enough to matter?
- Is its operation avoidable or necessary?
- Can it be controlled without creating a safety, comfort, or maintenance problem?
- Does the schedule match everyone’s actual occupancy?
- Does the electricity rate vary by time?
- Is the observed change larger than normal weather and billing variation?
- Will the likely savings justify the hardware and installation cost?
A practical prioritization method is:
Priority score ≈ annual avoidable cost × confidence that automation will workThis avoids prioritizing a high instantaneous wattage that runs for only a few minutes while overlooking a smaller load that operates continuously.
Calculate whether the device will pay for itself
Use a baseline rather than a generic claim:
Annual savings = baseline annual energy cost − post-automation annual energy costSimple payback = (purchase price + installation cost) ÷ expected annual savingsInclude the purchase price, shipping, electrician or HVAC installation, required hub, subscription fees, the device’s own electricity use, utility rebates, and the possibility of replacement or cloud-service changes.
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A $25 smart plug that eliminates $30 of avoidable electricity use per year has an approximate 10-month payback. If it saves only $3 annually, its simple payback exceeds eight years and it is unlikely to be a good purchase for bill reduction alone. It may still be worthwhile for alerts, convenience, occupancy simulation, or safety-related notifications where appropriate.
A practical 30-day plan
Day 1: Establish the baseline
- Record the latest bill’s kWh, usage-based charges, billing dates, and effective rate.
- Check hourly or daily utility data.
- List electric heating, cooling, water heating, EV, pool, laundry, cooking, and always-on devices.
- Check rebates, demand-response offers, audits, and weatherization programs.
Days 2–7: Measure likely plug loads
Choose one or two devices that run for long periods or are often forgotten. Measure their kWh, not just their instantaneous watts. Do not interrupt equipment that must operate continuously or safely.
Week 2: Address HVAC
If the thermostat is compatible, create a schedule based on real occupancy. For a heat pump, confirm auxiliary-heat behavior before using large setbacks. If the existing thermostat is already programmable and working well, improving insulation, duct sealing, filters, or equipment maintenance may offer more value than adding connectivity.
Week 3: Automate proven waste
Apply schedules or auto-off only to loads that the measurements show are worth controlling. Check that every appliance resumes correctly and that the rule does not interfere with household routines.
Week 4 and the next bill: Verify
Compare the next complete billing period with a similar weather- and occupancy-adjusted period. Separate reduced kWh from a lower rate, a shorter billing period, a rebate, or an unusually mild month.
Which device should you buy first?
| Situation | Best first step | Reason |
|---|---|---|
| High summer or winter bills | Compatible smart thermostat or HVAC assessment | Heating and cooling are often the largest controllable loads. |
| Renter with no thermostat or panel access | Utility app, then an energy-monitoring smart plug | It provides useful data without modifying the HVAC or electrical panel. |
| Many devices remain on overnight | Monitoring plugs or a switched power strip | Schedules can target several compatible loads. |
| High bill with no obvious cause | Utility usage portal, then whole-home monitoring | Whole-home data helps explain loads that plugs cannot see. |
| Electric water heater, pool, EV, solar, or battery | Whole-home or circuit-level monitor | Major loads may not be accessible through ordinary outlets. |
| Time-of-use tariff | Utility app plus timed automation | Shifting use may matter as much as reducing total kWh. |
| Heat pump | Heat-pump-compatible thermostat | Incorrect setbacks can trigger auxiliary electric heat. |
| Budget below $30 | One monitoring smart plug | It tests whether a larger investment is justified. |
Buying checklist
Smart thermostat
- Confirm HVAC, staging, heat-pump, auxiliary-heat, and accessory compatibility.
- Check the C-wire or approved adapter requirement.
- Verify local schedule behavior during internet outages.
- Evaluate sensors, geofencing, occupancy detection, and privacy policies.
- Check utility rebates and demand-response eligibility.
- Include professional installation in the payback calculation.
Smart plug
- Choose energy monitoring if you need kWh data; control-only models may be cheaper.
- Check continuous-load ratings, safety certification, motor or compressor suitability, and startup current.
- Confirm platform, Matter, local-control, app, export, and subscription support.
- Keep the device ventilated and never exceed its rating.
Whole-home monitor
- Distinguish plug-in products from panel-mounted current-transformer systems.
- Check the number of circuits, solar and EV support, accuracy claims, data export, retention, and cloud dependence.
- Budget for qualified installation where required.
- Review privacy and account requirements before connecting it to your home network.
Common mistakes to avoid
- Assuming every smart device saves money: Monitoring is not saving until you act on the data.
- Overestimating standby power: Calculate the particular device’s annual cost.
- Using generic heat-pump setback advice: Check auxiliary-heat settings first.
- Confusing Matter with universal energy reporting: Features can vary by platform and firmware.
- Using the wrong rate in an app: A cost graph is only as accurate as its rate and measurement settings.
- Comparing unrelated months: Weather, occupancy, billing length, and solar production can change the result.
- Ignoring fixed charges: Reducing kWh may not reduce the full bill by the same percentage.
- Switching unsafe equipment: Refrigeration, medical, pumping, heating, and life-safety loads need special treatment.
- Forgetting installation costs: HVAC and panel work can dominate a device’s payback period.
Bottom line
Use a smart thermostat first when compatible HVAC equipment drives your bill. Use energy-monitoring smart plugs to investigate and automate specific, safe loads. Use a whole-home monitor when large circuits—such as electric water heating, pool equipment, EV charging, solar, or resistance heat—remain unexplained. Begin with free utility data and rebates, calculate the cost of the actual load, and verify the change on a comparable bill. The most effective smart-home system is the one that proves a meaningful saving rather than simply adding more connected devices.
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