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Check the fuel-mix or electricity disclosure for the utility or supplier and the specific service named on your bill. Confirm the reporting year and what the figures measure, then see whether nuclear is listed. In the U.S., the EPA’s Power Profiler can estimate the generation mix for your area, while the U.S. Energy Information Administration (EIA) provides national and more detailed generation data. Neither a regional estimate nor a national statistic proves which plant supplied the electricity at your outlet.
Start with the supplier and service on your bill
- Find the utility or electricity supplier. Use the company identified on your bill, not just the name of a billing or payment processor.
- Identify the specific service or product. If your market lets you choose a supplier or plan, note the product name too. A company may disclose different mixes for its default service and optional products.
- Look for the disclosure. Search the supplier’s website for terms such as “fuel mix,” “resource mix,” “environmental disclosure,” or “electricity label.” Check that the disclosure applies to your service and note its reporting year.
Read the label’s accounting basis as well as its percentages. A figure might describe electricity generation, a delivered mix, or energy attributes; those are not interchangeable. The EPA explains that a utility’s electricity service is generated from a mix of resources and technologies. Its delivered-electricity overview also reports a U.S. generation mix for 2020, when nuclear was 20%—a historical figure, not a current estimate.
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Use U.S. tools for context, not individual tracing
EPA Power Profiler: estimate your regional mix
Enter a ZIP code or select an eGRID subregion in the EPA’s Power Profiler. It estimates the generation mix for a region. That can help put a supplier disclosure in context, but it is not a result for your supplier’s particular contract and does not trace the electricity reaching your home.
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EIA: check national and detailed generation data
The EIA’s electricity overview gives national context; its electricity data pages link to state, plant, generator, and company information. Match every statistic to its year and make sure it describes actual generation rather than capacity. For example, the EIA overview reports that about 18% of U.S. utility-scale electricity generation came from nuclear energy in 2025. The EPA reports nuclear at 18.2% of U.S. electricity production in 2022. These are different years, so they should not be treated as competing readings of the same period.
#1 Best Overall
Emporia Vue 3 Home Energy Monitor - Smart Home Automation Module and Real Time Electricity Usage Monitor, Power Consumption Meter, Solar and Net Metering for UL Certified Safe Energy Monitoring
- SAFETY YOU CAN TRUST WITH UL CERTIFICATION: With Emporia Energy, your home energy monitoring is safe, reliable, and certified. The Emporia Vue is UL Listed, meaning it has met rigorous safety standards for electrical products in the U.S. and Canada. This certification ensures that every component has been thoroughly tested to prevent hazards, such as overheating, short-circuiting, or fire, offering you peace of mind as you manage your home’s energy consumption.
- INSTALLS IN CIRCUIT PANEL of most homes with clamp-on sensors. Supports Single phase, Single-split phase, and 2-wire systems. 3-wire systems; 3-phase, 4-wire Wye systems with earthed (TN or TT) neutral (no-Delta) are supported with an additional 200A sensor (sold separately).
- 24/7 ENERGY MANAGEMENT AND MONITORING: Automate, manage and control your home's real power anywhere, anytime to prevent costly repairs, conserve energy, and save costs. Monitor solar / net metering. PROTECTED BY A 1-YEAR WARRANTY.
- LOWER YOUR ELECTRIC BILL: Configure settings in the Emporia Energy App to automate energy management for time of use, peak demand, excess solar, and rewards programs. You can even see live reporting and invaluable savings opportunities instantly. Gauge real-time spending and get actionable notifications and automated energy management to help you reduce costs.
- REAL-TIME ENERGY DATA: REQUIRES 2.4 GHz WIFI WITH AN INTERNET CONNECTION to monitor energy use with iPhone / Android / Web app. Vue sensors collect energy data and are accurate from ±2%. The Vue is UL and CE Listed for your safety. 1 second data is only available in the app (when actively open) and retained 3 hours. Minute and hour data are retained in the cloud. 1 minute data is retained 7 days, 1 hour data is retained indefinitely. Export cloud data whenever you want in the app.
Know what a nuclear percentage can—and cannot—tell you
| Figure or disclosure | What it describes | What it does not establish |
|---|---|---|
| National or regional generation mix | Electricity generated across a defined geography and period. EPA reported 18.2% nuclear for U.S. electricity production in 2022; EIA reports about 18% of U.S. utility-scale generation in 2025. | The mix assigned to a particular supplier product or the generating plant behind an individual household’s electricity. |
| Supplier or product disclosure | The service or product covered by that disclosure, under its stated rules, year, and accounting basis. | A universal, directly comparable format across countries. For example, the UK government says its supplier fuel-mix disclosure table is compiled on an attribute basis and differs from the country’s generation mix. |
| Electricity at your outlet | Power delivered through an interconnected grid where supply and demand are balanced. | A household-level identification of the generating plant for each unit consumed. The cited tools and disclosures report generation, mix, or contractual accounting—not the physical path of each electron. |
Ask the supplier when the label is unclear
Contact the supplier and ask about the exact service or product on your bill. Useful questions include:
- Does this disclosure include nuclear power?
- Which reporting year does it cover?
- Does the figure describe generation, delivered electricity, or energy attributes?
- If a certificate or green-power product is involved, what exactly is being purchased, and what claim does the supplier make about it?
In the U.S., the EPA explains that retail renewable energy certificates (RECs) are sold separately from electricity and do not physically deliver electricity to customers. A certificate or other contractual claim should therefore be understood as an accounting or purchasing arrangement, not proof that nuclear-generated—or renewable-generated—electrons came through a particular outlet. See the EPA’s REC topics for more on how RECs work.
Rank #2
Sale
Smart Home Energy Monitor with 16 50A Circuit Level Sensors, Real-Time Power Usage & Electricity Cost Tracking, Ideal for Rental Homes & Shared Apartments, App History, Compatible with Home Assistant
- ⚡ EASY INSTALLATION: Installs in circuit panel of most homes with clamp-on sensors. Supports single-phase up to 240VAC line-neutral; single, split-phase 120/240VAC; and three-phase up to 415Y/240VAC (no Delta). The branch lines can automatically match different phases and have no restrictions in terms of quantity and voltage.Panels with access only to busbars will need flexible sensors available from SEM-Meter.
- ⚡ ENERGY MONITORING ANYTIME, ANYWHERE: Monitor your home's real power anywhere, anytime to prevent costly repairs, conserve energy, and save costs. Monitor solar / net metering. Light commercial 3 phase option available as a separate bundle. Protected by a 1-year warranty.
- ⚡ VARIOUS ELECTRICAL APPLIANCE MONITORING: Comes with 16 50A sensors to accurately monitor your air conditioner, furnace, water heater, washer, dryer, range, etc.
- ⚡ LOWER YOUR ELECTRIC BILL: SEM-Meter measures real-time spending and gets actionable notifications to understand where savings can be made, both to lower your electric bill and to conserve energy and protect the planet’s resources. Be an environmentalist.
- ⚡ REAL-TIME ENERGY DATA: Connect SEM-Meter device via 2.4GHz WiFi to monitor energy usage, with an accuracy range of 1%. View usage in real time through Android/Apple software. Statistics of power usage in now/day/week/month/year format: the validity period of hourly exported data is 90 days, and the exported data of day/month/year data is permanent, available at any time Export from application.
If you are outside the United States
Look for the electricity supplier’s official fuel-mix or environmental disclosure, and check its year, product scope, and accounting basis. Rules, supplier choice, and disclosure formats vary by country and market. As the UK example shows, an attribute-based supplier disclosure can differ from a country’s physical generation mix; do not assume that another jurisdiction uses the same method.
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Best Value
Emporia Vue 3 Home Energy Monitor - Smart Home Automation Module and Real Time Electricity Usage Monitor, Power Consumption Meter, Solar and Net Metering for UL Certified Safe Energy Monitoring
- SAFETY YOU CAN TRUST WITH UL CERTIFICATION: With Emporia Energy, your home energy monitoring is safe, reliable, and certified. The Emporia Vue is UL Listed, meaning it has met rigorous safety standards for electrical products in the U.S. and Canada. This certification ensures that every component has been thoroughly tested to prevent hazards, such as overheating, short-circuiting, or fire, offering you peace of mind as you manage your home’s energy consumption.
- INSTALLS IN CIRCUIT PANEL of most homes with clamp-on sensors. Supports Single phase, Single-split phase, and 2-wire systems. 3-wire systems; 3-phase, 4-wire Wye systems with earthed (TN or TT) neutral (no-Delta) are supported with an additional 200A sensor (sold separately).
- 24/7 ENERGY MANAGEMENT AND MONITORING: Automate, manage and control your home's real power anywhere, anytime to prevent costly repairs, conserve energy, and save costs. Monitor solar / net metering. PROTECTED BY A 1-YEAR WARRANTY.
- LOWER YOUR ELECTRIC BILL: Configure settings in the Emporia Energy App to automate energy management for time of use, peak demand, excess solar, and rewards programs. You can even see live reporting and invaluable savings opportunities instantly. Gauge real-time spending and get actionable notifications and automated energy management to help you reduce costs.
- REAL-TIME ENERGY DATA: REQUIRES 2.4 GHz WIFI WITH AN INTERNET CONNECTION to monitor energy use with iPhone / Android / Web app. Vue sensors collect energy data and are accurate from ±2%. The Vue is UL and CE Listed for your safety. 1 second data is only available in the app (when actively open) and retained 3 hours. Minute and hour data are retained in the cloud. 1 minute data is retained 7 days, 1 hour data is retained indefinitely. Export cloud data whenever you want in the app.
Rank #4
Emporia Vue 3 Home Energy Monitor - Smart Home Automation Module and Real Time Electricity Usage Monitor, Power Consumption Meter, Solar and Net Metering for UL Certified Safe Energy Monitoring
- SAFETY YOU CAN TRUST WITH UL CERTIFICATION: With Emporia Energy, your home energy monitoring is safe, reliable, and certified. The Emporia Vue is UL Listed, meaning it has met rigorous safety standards for electrical products in the U.S. and Canada. This certification ensures that every component has been thoroughly tested to prevent hazards, such as overheating, short-circuiting, or fire, offering you peace of mind as you manage your home’s energy consumption.
- INSTALLS IN CIRCUIT PANEL of most homes with clamp-on sensors. Supports Single phase, Single-split phase, and 2-wire systems. 3-wire systems; 3-phase, 4-wire Wye systems with earthed (TN or TT) neutral (no-Delta) are supported with an additional 200A sensor (sold separately).
- 24/7 ENERGY MANAGEMENT AND MONITORING: Automate, manage and control your home's real power anywhere, anytime to prevent costly repairs, conserve energy, and save costs. Monitor solar / net metering. PROTECTED BY A 1-YEAR WARRANTY.
- LOWER YOUR ELECTRIC BILL: Configure settings in the Emporia Energy App to automate energy management for time of use, peak demand, excess solar, and rewards programs. You can even see live reporting and invaluable savings opportunities instantly. Gauge real-time spending and get actionable notifications and automated energy management to help you reduce costs.
- REAL-TIME ENERGY DATA: REQUIRES 2.4 GHz WIFI WITH AN INTERNET CONNECTION to monitor energy use with iPhone / Android / Web app. Vue sensors collect energy data and are accurate from ±2%. The Vue is UL and CE Listed for your safety. 1 second data is only available in the app (when actively open) and retained 3 hours. Minute and hour data are retained in the cloud. 1 minute data is retained 7 days, 1 hour data is retained indefinitely. Export cloud data whenever you want in the app.
Rank #3
Watt Meter Power Meter Plug Home Electricity Usage Monitor 7 Modes Display
- Various Monitoring Parameters: The power meter plug can monitor the power (W), energy (kWh), volts, amps, hertz, power factor, cost, minimum and maximum power (W), cumulative days and time of your appliances. By switching 7 display modes, you can easily know the various parameters while the appliance is working. The home energy monitor can also calculate and display how much power your appliance uses and how much electricity bill it cost in cumulative time
- Upgraded LCD Display: With large screen size 2.36 inch x 1.85 inch, clearer monitor backlit, our electrical usage monitor can display the data clearer and more visible no matter day or night. 180°full wide viewing angles is great for reading and recording the data in any angles. No need to stand on the front of the display and bend over to read the numbers
- Adjustable Backlight Time: Our upgraded watt meter has 5 options of backlight time. The default backlight time duration is 10 minutes(bL-0). If you want to change the backlight time, you can press and hold "UP" and "DOWN" button at the same time to enter backlight time setting, then press "UP" and "DOWN" to select the backlight time (bL-0 =10 minutes, bL-1=1 hour, bL-2=4 hours, bL-3=8 hours, bL-4=always on), finally press the "COST" to save the backlight time settings
- Overload protection: When the power of the appliance exceeds the overload power, the LCD will display “OVERLOAD” to warn the user. All the buttons will quit working and can only be workable when you lower or remove the load power. The default overload power is 3680W and is adjustable from 0 to 3680W. In general, you need to set the overload power to 1800W before using. Just press the "function" button for more than 3 seconds to enter the setting
- Data Memory Function: The wattage meter will record your power consumption data when you remove it from socket, or remove appliances from the electricity monitor. You can directly see the last data when you use it next time. This function can also automatically save the data when there is a sudden power failure
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