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Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minuteNeither plan is always cheaper. A flat-rate plan keeps the energy price per kilowatt-hour (kWh) consistent, while a time-of-use (TOU) plan charges different prices at defined times. TOU can cost less if you can shift enough electricity use to cheaper periods; it can cost more if much of your use stays in expensive periods. The reliable answer comes from applying your own usage data to your utility’s current tariffs.
What changes between the two plans?
With a flat-rate plan, the energy charge is generally the same per kWh regardless of when electricity is used. With a TOU plan, the price depends on the tariff’s defined periods: prices rise during peak-demand periods and fall during lower-demand periods. The utility sets the relevant hours, seasons, and rates, so there is no single national peak schedule. DOE’s Alternative Fuels Data Center describes the TOU pricing structure.
TOU is not the same as every form of dynamic pricing. The DOE-hosted PURPA implementation manual distinguishes TOU prices, which are established in advance and known to customers, from critical-peak and real-time pricing, which can change more sharply or frequently. The manual reproduces the statutory description that pre-established prices let customers respond by shifting use or reducing consumption. Read the DOE-hosted manual.
Why your usage pattern matters more than monthly kWh alone
Two households using the same total kWh can have different bills on a TOU tariff if one uses more electricity during expensive periods. DOE describes a customer’s load in terms of both its magnitude and its shape over time; utility costs and bill structures can depend on both. A monthly total does not show when your energy was used, so it cannot by itself determine whether TOU would save you money. DOE guidance on evaluating utility rate options.
#1 Best Overall
- 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
DOE’s summary of a historical utility study notes that customers with relatively high consumption in expensive peak periods can see bills increase under time-based rates if they do not change when they use electricity. That is a risk to check against your own schedule, not a prediction that all TOU customers will pay more. DOE’s 2016 study summary.
How to compare the plans using your bills
- Get the actual tariffs. Ask your utility for the current flat-rate and TOU rate sheets. Confirm eligibility, peak, off-peak and any shoulder periods, seasonal schedules, energy prices, fixed monthly fees, and applicable demand charges. If separate companies provide supply and delivery, include both bill portions.
- Collect interval usage data. Use several months of bills to represent your normal seasons and routines. If available, download hourly or 15-minute usage data from your utility; this shows when consumption occurred and can reveal monthly peaks. DOE recommends reviewing bills and using interval data where available. DOE’s rate-options guidance.
- Calculate each plan’s energy charge. For each interval, assign the recorded kWh to the applicable tariff period and multiply by that period’s rate. Sum the charges across the billing period for each plan.
- Add the other charges that change. Include each plan’s fixed fees and any demand charge that applies. Keep bill items that are identical under both plans the same in the comparison. Demand charges can be based on a monthly maximum, a peak-period maximum, or a look-back or ratchet rule; check the tariff rather than comparing cents per kWh alone. DOE explains energy, demand, and fixed charges.
- Model only realistic shifts. Identify loads you can genuinely move to a cheaper period, and account for household needs and operating limits. Compare the resulting schedule with your existing usage rather than assuming every flexible appliance can run off-peak.
- Confirm the result with the utility. Ask it to verify the tariff, time periods, current prices, eligibility, and whether it offers a rate review. DOE recommends checking rate options and asking about review services. See DOE’s guidance.
The plan with the lower calculated bill for your representative usage is the cheaper one for that usage pattern. If your routines or the utility’s rates change, the comparison may change too.
Rank #2
- Multi-function power monitor: Our electric usage monitor can monitor the power (W), electricity(kWh), voltage(V), frequency(Hz), current(A), power factor(PF), unit price($/kWh), total cost($) of your appliances. By switching 8 display modes, you can easily know the various parameters while the appliance is working. The “electricity” mode can calculate and display how much power your appliance uses. And the “total cost” mode will show how much electricity bill it cost in cumulative time
- Overload protection: When the loading power of the appliance is over the default overload threshold 1800W, the whole display with backlight and the word “OVERLOAD” will keep flashing to warn the users. Please turn off the appliance for safety concern
- Premium Material: The whole body of our energy meter is made of high-quality ABS material. It makes our home electricity usage monitor more long lasting, fireproof and anti-drop. The standard US socket and plug is suitable for all US standard appliances
- Backlight Display: With white backlight and black words, the LCD display of our home power monitor can display the data clearer and help you to read the data easier no matter day or night. The backlight will only lights up when the device is connected to AC power. If no button is pressed, the backlight turns off automatically after 10 minutes. You can also press the "UP" button to turn off the backlight manually, and press any button to turn on backlight again
- Easy to reset: No reset tool needed, our appliance power usage meter is easy to reset. You can press the “M” button for 5 seconds directly to reset the device. After reset, all cumulative data (electricity quantity, cost) will be cleared, and all settings will be restored to factory settings
When TOU may help—and when it may not
TOU may suit you if you can move substantial use
Households able to schedule flexible electricity use during lower-priced periods may benefit, depending on the difference between the tariff’s rates and their actual consumption pattern. DOE’s managed-charging guidance gives scheduled off-peak electric-vehicle charging as a possible way to manage energy costs and, where applicable, demand charges. DOE guidance on managed EV charging.
A flat rate may be safer if essential use falls in peak periods
If cooking, cooling, heating, medical equipment, or other essential needs concentrate your usage in the utility’s expensive period, you may have little practical room to shift it. The relevant question is whether the savings from usage you can move outweigh the higher price on usage that remains in peak periods. DOE’s historical study summary documents the possibility of higher bills when customers retain high peak-period consumption without responding to the time-based prices. DOE’s study summary.
The Tool Desk
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- 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.
Check the full bill, not just the advertised energy rate
Energy charges are based on kWh used. A demand charge, when the tariff includes one, is based on the highest power demand measured in kilowatts (kW) over a defined period or under a specified rule. Fixed monthly charges apply separately. DOE notes that demand charges can use monthly peaks, time-specific peaks, or look-back rules. These components can materially affect a comparison, particularly for commercial customers; residential applicability depends on the utility’s specific tariff. DOE’s explanation of utility bill components.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What the available national figures do—and do not—show
There is no current national average dollar saving established here for switching between TOU and flat-rate plans. A historical DOE report stated that 98% of U.S. residential customers were on flat or inclining-block rates, attributing that figure to FERC in 2012. The same report cited an Institute for Electric Innovation figure from 2014 of more than 50 million smart meters covering over 43% of U.S. homes. These dated figures describe the period cited in the report; they are not current adoption or coverage statistics, nor do they establish which plan costs less today. DOE’s 2016 report.
Quick Recap
Best Value
- ✓ Backlit LCD Display: The watt meter features an upgraded backlit LCD display with a 160° wide viewing angle, providing clear and distinct data readings from any angle, day or night. (Note: To conserve energy, the backlight will automatically turn off after 15 seconds of continuous use.)
- ✓ 9 Types of Data Display: This energy meter plug accurately monitors a wide range of electrical parameters, including power (W), apparent power (VA), energy consumption (kWh), usage time (hours), power frequency (Hz), power factor (PF), voltage (V), current (A), and electricity cost. The user-friendly interface allows you to easily read and navigate through 9 types of data with a single button.
- ✓ Save Money and Energy: By toggling through the 9 display modes, you can gain insights into various operational parameters of your devices. The home energy monitor also calculates and displays the electricity consumption and cost over time, helping you save on your electricity bills by monitoring and managing energy usage.
- ✓ Data Storage: The plug-in electricity meter stores all non-real-time data, ensuring no information is lost in the event of a sudden power outage. If data exceeds the screen’s maximum display range, the screen will flash as a reminder. Pressing and holding the reset button for 3 seconds will reset the cumulative data to zero.
- ✓ Safe to Use: Rated voltage 125VAC, 60Hz, 15A maximum 1875W resistor and tungsten wire, 1/2HP. Clean and tidy interface, very simple to use.
Rank #4
- 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
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
