If you want to cut your energy bills, I recommend exploring the top home energy monitors like Sense, Emporia, and Efergy. These devices provide real-time insights on individual circuit and appliance use, helping you identify saving opportunities. They’re compatible with various platforms and guarantee precise data to optimize your energy habits. Keep exploring further, as I’ll share more about what makes each of these monitors stand out.
Key Takeaways
- Support for multiple circuits and advanced features enables detailed energy monitoring to identify savings opportunities.
- Compatibility with platforms like Home Assistant and MQTT allows seamless integration with smart home systems.
- High accuracy measurements (±2%) and local data storage ensure reliable insights without reliance on cloud services.
- Installation by licensed electricians ensures safety and proper setup in complex or older electrical panels.
- Real-time data, detailed reports, and device-level analysis help optimize energy use and reduce utility bills.
SIEMENS Inhab Smart Home Energy Monitor
The Siemens Inhab Smart Home Energy Monitor is an ideal choice for homeowners who want detailed, real-time insights into their energy use at both the whole-home and circuit levels. I appreciate how it installs directly in your electrical panel, measuring up to 16 circuits with high accuracy. It supports advanced features like Time of Use and Peak Demand Management, helping me identify when I consume the most power. The system sends data to the cloud and app, making it easy to monitor consumption and solar production. Although installation requires a licensed electrician, the detailed, assumption-free data helps me optimize energy use and save on bills.
Best For: homeowners seeking detailed, real-time energy monitoring at both the whole-home and circuit levels with advanced management features.
Pros:
- Provides accurate, assumption-free data at circuit and main levels for precise energy insights.
- Supports advanced functionalities like Time of Use and Peak Demand Management to optimize energy consumption.
- Easy integration with cloud and mobile app for real-time monitoring and historical data analysis.
Cons:
- Installation requires a licensed electrician and can be time-consuming and messy due to wiring complexity.
- Limited to 16 sensors, which may be insufficient for larger or more complex electrical panels.
- App export process can be cumbersome, with occasional data spikes and regional restrictions affecting usability.
Sense Energy Monitor, Real-Time Electricity Usage Tracker
If you want to gain real-time insights into your home’s energy consumption and identify ways to save, the Sense Energy Monitor is an excellent choice. It tracks electricity use instantly, helping you understand which devices are active and when. With support for time-of-use rate plans, it can help reduce your bills. You can set custom notifications for critical appliances like sump pumps or water heaters. The device connects via Bluetooth and WiFi, allowing remote monitoring through iOS, Android, or web apps. Easy to install—usually in about 30 minutes—but best done by a licensed electrician for safety. Overall, it’s a smart tool to optimize your energy efficiency.
Best For: homeowners and property managers seeking real-time energy insights, cost savings, and device monitoring to optimize household or building energy use.
Pros:
- Provides instant, real-time data on household energy consumption, aiding in efficient energy management.
- Supports remote monitoring via mobile and web apps, allowing access from anywhere.
- Enables customization with notifications for critical devices and compatibility with time-of-use rate plans for cost savings.
Cons:
- Installation should be performed by a licensed electrician due to safety concerns with live wiring.
- Limited calibration options and potential discrepancies of 5-10% compared to utility meters.
- Compatibility is restricted to North America, and it may not support complex billing schemes in all regions.
Home Energy Monitor with WiFi/Ethernet (EYEDRO-HOME)
For homeowners seeking real-time energy insights with flexible connectivity, the EYEDRO-HOME Home Energy Monitor with WiFi or Ethernet stands out as an ideal choice. It provides instant data on electricity use, supporting solar and net metering, with clear displays of watts, amps, volts, and costs. Setup is simple, whether using WiFi or Ethernet, and it includes sensors that clamp around cables for easy installation. The device uploads data to the cloud, allowing you to monitor your entire home’s consumption from your smartphone or computer. With detailed reports, bill comparisons, and notifications for appliance spikes, EYEDRO-HOME helps you identify savings opportunities and optimize energy efficiency effectively.
Best For: homeowners looking for real-time, comprehensive energy monitoring with flexible WiFi or Ethernet connectivity to identify savings opportunities and optimize energy use.
Pros:
- Supports solar and net metering integration for complete energy tracking
- Easy installation with clamp-on sensors and user-friendly setup instructions
- Provides real-time data and detailed reports accessible via mobile devices and computers
Cons:
- Limited data customization options on the web platform
- Reliance on cloud storage may impact data access if support ceases
- Some users experience initial connectivity issues requiring technical support
Efergy True Power Meter for Voltage and Phase Measurement
The Efergy True Power Meter excels at providing accurate voltage, phase angle, and true power measurements, making it ideal for homeowners who want precise energy data. It displays readings in kilowatts and compensates for power factor in real-time, which helps optimize energy use, especially in single-phase setups like solar systems. The device features an LCD display, is solar-powered, and has a long-lasting battery life. While it doesn’t include Wi-Fi, it offers improved voltage stepping for better accuracy and cost savings. Installation is straightforward, but pairing with the optional Efergy Hub activate advanced analytics. Overall, it’s a reliable tool for those seeking detailed electrical measurements.
Best For: homeowners seeking precise, real-time voltage, phase angle, and power measurements to optimize their energy use, especially in single-phase or solar setups.
Pros:
- Provides high-accuracy voltage, phase angle, and true power measurements in real-time
- Compensates for power factor, improving measurement precision and energy efficiency
- Easy to install with straightforward clamp sensors and pigtails, suitable for main or sub-panels
Cons:
- Does not include Wi-Fi or advanced connectivity options for remote monitoring
- Limited data analysis features without pairing with the optional Efergy Hub
- Some users report issues with power adapter fit and limited interface functionality
Emporia Gen 3 Smart Home Energy Monitor
The Emporia Gen 3 Smart Home Energy Monitor stands out as an excellent choice for homeowners seeking detailed, real-time energy data to optimize their consumption. It features 16 50A circuit sensors supporting various electrical systems, ensuring extensive coverage. UL Listed and CE certified, it guarantees safety and reliability. The monitor provides precise data via WiFi, capturing energy use every second with ±2% accuracy. Its app displays real-time and historical info, helping identify high-energy devices and peak demands. Installation is straightforward for those comfortable with electrical work. Overall, the Emporia Gen 3 empowers me to monitor and control my energy use effectively, leading to savings and improved system troubleshooting.
Best For: homeowners seeking detailed, real-time energy monitoring and cost-saving insights for their entire household electrical system.
Pros:
- Provides highly accurate, real-time energy data with ±2% precision.
- Supports a wide range of electrical system configurations, including single-phase and three-phase setups.
- Facilitates energy management and automation through app features and integration options.
Cons:
- Installation requires electrical knowledge and access inside circuit panels, which may be complex for some users.
- The app interface is considered dated and less intuitive compared to competitors.
- Data reliance on cloud storage raises concerns about long-term data security and device longevity.
Smart Home Energy Monitor with 16 50A Circuit Level Sensors
Are you looking for an all-encompassing energy monitoring solution that can handle multiple circuits simultaneously? The Smart Home Energy Monitor with 16 50A circuit sensors is perfect for that. It measures real-time power usage and provides detailed historical data through an app, supporting systems like Home Assistant and MQTT. Its compact design makes installation straightforward in most breaker panels, whether single-phase, split-phase, or three-phase setups. With flexible sensors, local LAN operation, and compatibility with solar and net metering, it offers comprehensive monitoring. Plus, it’s backed by a 1-year warranty and user-friendly features that help identify high-consuming appliances and optimize energy consumption.
Best For: homeowners and technical users seeking comprehensive, multi-circuit energy monitoring with easy integration into home automation systems.
Pros:
- Supports up to 16 circuits with flexible sensors for detailed power analysis.
- Compatible with Home Assistant, MQTT, and offers local LAN operation without cloud dependency.
- Compact design and straightforward installation suitable for various panel types, including split-phase and three-phase systems.
Cons:
- Installation can be challenging for some users, especially in complex or older breaker panels.
- Limited to single-phase up to 240VAC and three-phase up to 415Y/240VAC; no Delta configuration support.
- Requires some technical knowledge for configuration adjustments and YAML integration.
SIEMENS Inhab Smart Home Energy Monitor
If you want precise, real-time energy monitoring at both the whole-home and circuit levels, the Siemens Inhab Smart Home Energy Monitor is an excellent choice. It installs directly into your electrical panel, measuring energy use at mains and up to 16 circuits with 50A sensors. The system provides detailed data through its user-friendly app, supporting features like Time of Use Management, Peak Demand Control, and solar generation tracking. It’s compatible with the US and Canada, and installation requires a licensed electrician. While some users find sensor wiring challenging and the channel limit restrictive, the monitor offers valuable insights to help reduce energy consumption and save on bills.
Best For: homeowners seeking precise, real-time energy monitoring at both the whole-home and circuit levels with detailed insights to optimize energy usage.
Pros:
- Provides comprehensive real-time data on energy consumption and solar generation
- Supports advanced features like Time of Use Management and Peak Demand Control
- Easy-to-use app with detailed charts and data export options
Cons:
- Installation requires a licensed electrician and can be time-consuming
- Limited to 16 sensor channels, which may be restrictive for larger panels
- App access issues outside the US/Canada and some challenges with sensor wiring and data spikes
Smart Home Energy Monitor with Circuit Sensors and Real-Time Tracking
Home energy monitors with circuit sensors and real-time tracking are ideal for homeowners and small business operators who want precise, continuous insight into their energy consumption. The Refoss Smart Home Energy Monitor offers 98% accuracy and supports various electrical systems, making installation straightforward for licensed electricians. It includes detailed data on power, voltage, current, and power factor, with alerts for unusual activity. Supporting solar and renewable energy measurements, it helps maximize savings and efficiency. The device integrates with Home Assistant and stores data locally for privacy. Its sleek design and all-encompassing features make it a powerful tool for monitoring energy use and reducing bills effectively.
Best For: homeowners and small business owners seeking precise, real-time energy monitoring with customizable alerts and renewable energy integration.
Pros:
- High 98% accuracy and detailed real-time data on power, voltage, current, and power factor
- Supports solar and renewable energy measurement for maximizing efficiency
- Local data storage ensures privacy and allows comprehensive historical analysis
Cons:
- Installation requires a professional electrician due to electrical complexity and safety considerations
- Manual setup and clamp orientation can be confusing for some users, potentially affecting accuracy
- Limited app display for double-pole breakers may cause wattage readings to appear doubled
Sense Energy Monitor
Looking to gain real-time insights into your home’s energy use and identify potential savings? The Sense Energy Monitor makes this easy by tracking electricity consumption instantly and offering detailed data. It detects individual devices over time, helping you understand where your energy goes. You can set custom notifications for critical appliances and monitor remotely via iOS, Android, or web apps. Installation is straightforward but should be done by a licensed electrician for safety. While it’s generally accurate, expect slight discrepancies. Overall, Sense helps you optimize energy use, save money, and gain peace of mind, making it a smart choice for home energy management.
Best For: homeowners and landlords seeking real-time energy insights, device detection, and cost management to optimize home energy use and savings.
Pros:
- Provides real-time monitoring and detailed energy consumption data for better management.
- Detects individual devices over time, helping identify energy hogs and optimize usage.
- Supports remote access via iOS, Android, and web apps for convenient monitoring from anywhere.
Cons:
- Installation requires a licensed electrician due to live wiring and safety considerations.
- Slight discrepancies (5-10%) compared to utility meters may require calibration for precise tracking.
- Compatibility is limited to North America, and it may not support complex billing schemes in some regions.
Upgraded Watt Power Meter Plug for Home Electrical Monitoring
The upgraded watt power meter plug is an excellent choice for anyone seeking detailed insight into their household energy consumption. It tracks power (W), energy (kWh), volts, amps, and more, helping you understand your appliances’ efficiency. The large, backlit LCD is easy to read day or night, with seven display modes for quick parameter access. It records data even after disconnection, and you can set overload limits for safety. Many users find it simple to use and effective for identifying energy hogs. Although it doesn’t monitor high-voltage appliances directly, it’s perfect for measuring everyday devices, saving you money by optimizing your power usage.
Best For: homeowners and energy-conscious individuals seeking an affordable, easy-to-use device to monitor household appliance energy consumption and optimize power usage.
Pros:
- Large, clear backlit LCD display for easy reading day or night
- Tracks multiple parameters including power, energy, volts, amps, and cost
- Data memory function records consumption even after disconnection or power failure
Cons:
- Does not monitor high-voltage appliances like ovens or dryers directly
- Some controls and settings require instructions to access and understand
- Lacks WiFi or Bluetooth connectivity for real-time remote monitoring
Emporia Gen 3 Smart Home Energy Monitor
Are you seeking an exhaustive energy monitoring solution that offers high accuracy and detailed circuit-level insights? The Emporia Gen 3 Smart Home Energy Monitor might be just what you need. It supports various electrical systems, including single-phase and three-phase setups, with 16 high-capacity sensors. Certified UL and CE, it guarantees safety and reliability. With real-time data via WiFi, ±2% accuracy, and detailed circuit monitoring, it helps identify energy hogs and optimize usage. Its app provides historical data and peak demand analysis, aiding cost savings. Installation is straightforward for those comfortable with electrical work, and the device integrates with platforms like Home Assistant for enhanced control.
Best For: homeowners and energy enthusiasts seeking precise, circuit-level energy monitoring and detailed usage insights to optimize their energy consumption and reduce costs.
Pros:
- High accuracy within ±2%, providing reliable energy data for informed decision-making
- Supports a wide range of electrical systems, including single-phase and three-phase setups, with 16 sensors for comprehensive coverage
- Certified UL and CE, ensuring safety, quality, and compliance with industry standards
Cons:
- App interface is functional but considered dated and less intuitive compared to competitors
- Installation requires familiarity with electrical work, which may be challenging for some users
- Reliance on cloud storage for data raises concerns about long-term viability and privacy
Multi-Function Digital Energy Meter
If you need a compact, multi-function energy meter capable of measuring voltage, current, frequency, power, and power factor, the GT2P-E model is an excellent choice. It measures AC voltage from 80 to 270V, current up to 100A, and frequency at 50/60Hz, with a power capacity up to 25KW. Designed for rail mounting, it’s built from durable ABS and PC alloy for impact resistance and heat retardation. While it’s effective for basic monitoring, it doesn’t support 220V single-phase directly, so multiple units may be necessary. Keep in mind, outdoor readability can be limited, and some users experience data loss during outages.
Best For: individuals or businesses needing a compact, multi-function energy meter for basic AC voltage, current, frequency, and power measurement, especially in rail-mounted installations.
Pros:
- Durable construction from impact-resistant ABS and PC alloy materials.
- Compact design suitable for various installation environments.
- Capable of measuring multiple parameters including power factor and kilowatt-hours.
Cons:
- Does not support direct 220V single-phase measurement, requiring multiple units for such applications.
- Limited outdoor readability, making it less suitable for outdoor use.
- Some users experience data loss during power outages, lacking built-in memory to retain readings.
Sense Flex Home Energy Monitor
For homeowners seeking precise energy monitoring, the Sense Flex Home Energy Monitor stands out because it can track multiple circuits and support real-time data access across various devices. It monitors up to two 120V/240V circuits, generator, solar, or split-service systems, providing detailed insights into energy use. The device connects via WiFi and displays data on iOS, Android, and web apps, even supporting time-of-use rate plans. While installation is straightforward for experienced users, it requires careful setup and electrical knowledge. The monitor offers accurate voltage and current readings, helping families identify device activity, improve efficiency, and stay informed about their energy consumption.
Best For: homeowners with electrical knowledge seeking detailed, real-time energy monitoring across multiple circuits and systems.
Pros:
- Supports monitoring of up to two circuits, generator, solar, or split-service systems for comprehensive energy tracking.
- Provides accurate voltage and current measurements, resulting in precise energy data.
- Compatible with iOS, Android, and web apps, and supports time-of-use rate plans for flexible energy management.
Cons:
- Installation can be challenging and risky for those without electrical experience, requiring careful setup.
- Device auto-identification is unreliable, often necessitating manual device renaming and user intervention.
- Limited customer support channels may delay troubleshooting and resolution of technical issues.
Home Energy Monitor with WiFi or Ethernet Connection
A home energy monitor with WiFi or Ethernet connection is ideal for those who want real-time electricity data accessible from their smartphones or computers. I find the Eyedro-HOME perfect because it supports cloud software that displays detailed information like watts, amps, volts, and costs. The setup is straightforward, whether using WiFi or Ethernet, and it can monitor the entire house, including solar generation. I like that it sends alerts for appliance spikes and helps identify unnecessary energy use. With clear reports and easy access via a web interface, I can make informed decisions to cut bills and improve efficiency. It’s a practical tool for anyone serious about energy savings.
Best For: homeowners and energy-conscious individuals seeking real-time, detailed electricity monitoring to reduce costs and optimize energy use.
Pros:
- Supports cloud-based software with comprehensive data display and reporting features.
- Easy to install and set up via WiFi or Ethernet, with sensors that clamp around existing cables.
- Monitors the entire house, including solar generation, providing valuable insights for energy savings.
Cons:
- Limited customization options for data analysis on the web platform; CSV exports are necessary for detailed review.
- Accuracy depends on user-input voltage; lack of potential transformers may affect precision if voltage fluctuates.
- Initial connectivity issues reported by some users, requiring technical support to resolve.
Upgraded Watt Meter Power Meter Plug with Backlight and Overload Protection
The Upgraded Watt Meter Power Meter Plug with Backlight and Overload Protection stands out as an ideal choice for anyone seeking precise and reliable energy monitoring. It offers multiple functions, including measuring power, electricity consumption, voltage, frequency, current, and power factor. The device calculates energy costs based on user-set rates and stores data even after unplugging. Its overload protection alerts you when appliances exceed 1800W, ensuring safety. With a durable ABS build, a clear backlight display, and easy reset options, this monitor is versatile and user-friendly. It’s perfect for tracking household appliance efficiency, helping you identify energy hogs and save on bills.
Best For: Homeowners, energy-conscious individuals, and small business owners seeking accurate, reliable, and easy-to-use energy monitoring to reduce electricity costs and enhance safety.
Pros:
- Multi-function display provides comprehensive real-time data on power, consumption, voltage, and more.
- Overload protection feature ensures safety by alerting and shutting down appliances exceeding 1800W.
- Data memory allows continuous tracking of energy usage and costs even after unplugging or power failure.
Cons:
- Limited to appliances with power draw below 1800W due to overload threshold.
- Auto backlight auto-off after 10 minutes may require manual reactivation for prolonged use.
- Slightly larger size may be less discreet in tight spaces or for portable use.
Factors to Consider When Choosing Home Energy Monitors
When choosing a home energy monitor, I look at how well it fits my electrical system and how accurate its measurements are. I also consider how easy it is to install, access data, and connect with other devices. Understanding these factors helps me pick a monitor that suits my needs and makes energy management simpler.
Compatibility With Electrical Systems
Choosing a home energy monitor requires guaranteeing it matches your electrical system’s specifics. First, check if it’s compatible with your voltage, whether you have a standard single-phase or a three-phase setup. Make sure it supports your circuit’s amperage ratings, typically from 60A to 200A, for accurate readings. It’s also important to verify that the device aligns with your country’s electrical standards, including plug types, voltage ranges, and safety certifications. Additionally, consider your panel’s wiring scheme—whether split-phase or Wye—and ensure the monitor supports the necessary sensor types, like clamp-on or through-the-wire sensors. Finally, review the installation requirements to confirm that the hardware will fit safely within your existing electrical panel without issues.
Measurement Accuracy and Range
How accurately your home energy monitor measures power and energy depends largely on its precision and measurement range. A reliable device should have a precision within 1-2%, giving you trustworthy readings of power, voltage, current, and energy consumption. It’s also important that it covers common household voltages, typically between 100-240V, and currents up to 60A, so it can handle various appliances. Devices with true RMS measurement are preferable, especially for AC loads with non-sinusoidal waveforms, as they provide more precise readings. Additionally, the ability to measure both instantaneous power (kW) and accumulated energy (kWh) over time is critical. Finally, calibration options or factory calibration help maintain accuracy despite fluctuations, ensuring your data stays reliable over the device’s lifespan.
Installation Complexity
The installation process for home energy monitors can vary considerably based on the device’s design and complexity. Some models are simple plug-in units that require minimal setup, making them accessible even for beginners. Others need wiring inside the electrical panel, which involves connecting current transformers (CTs) and securely mounting components—tasks that can be time-consuming and technically demanding. Certain monitors also require manual configuration of voltage, current, and circuit labels, adding to the setup effort. In many cases, a licensed electrician is recommended or required, especially when working with energized panels or multiple circuits, to guarantee safety and proper installation. Overall, the level of difficulty can influence your satisfaction, so choosing a monitor that matches your technical comfort is essential.
Data Accessibility and Analysis
When selecting a home energy monitor, it’s crucial to take into account how easily you can access and analyze your data. I look for devices that offer data export options like CSV or Excel, so I can review detailed offline records. Real-time, high-frequency logging—down to one second—helps me spot trends accurately. Remote access via mobile apps or web portals is essential, allowing me to monitor energy usage from multiple devices and locations effortlessly. Custom dashboards, charts, and reports make understanding consumption patterns straightforward. Additionally, long-term data storage lets me compare past and current usage, helping me identify changes over time. Overall, a monitor with these features ensures I have detailed, accessible data to make informed decisions and optimize energy savings.
Connectivity Options Available
Choosing the right home energy monitor depends heavily on its connectivity options, as these determine how seamlessly I can access and manage my energy data. WiFi-enabled monitors are convenient because they connect directly to my home network, allowing real-time updates through mobile apps or web interfaces without extra hardware. Ethernet-based monitors offer a stable, wired connection, which is perfect if my WiFi is unreliable or I need secure, high-bandwidth data transfer. Bluetooth monitors are more limited; they require proximity to a smartphone or hub and have a shorter range. Some advanced models support multiple connectivity options simultaneously, providing flexibility for integration with home automation systems and smart devices. Considering these options helps guarantee I choose a monitor that fits my home setup and provides easy, reliable access to energy data.
Cost and Long-Term Value
While connectivity options determine how I access my energy data, considering cost and long-term value helps me make a smart investment. A higher upfront cost for a monitor with extensive features can pay off through energy savings over time. Devices that offer detailed, circuit-level insights help me identify high-energy appliances accurately, maximizing my return. I also look for monitors that support data export, integration with automation, and regular software updates, which enhance their usefulness and lifespan. Durability and safety certifications matter too—they ensure the monitor remains reliable and safe over years. Some models can pay for themselves within months by reducing energy bills, making them a cost-effective choice for long-term home energy management.
Frequently Asked Questions
How Accurate Are Home Energy Monitors in Measuring Real-Time Consumption?
You’re wondering how accurate home energy monitors are in measuring real-time consumption. I’ve found that most monitors are quite reliable, providing close estimates of your energy use. However, their accuracy depends on the device quality and installation. Some may have minor deviations, but overall, they give a good idea of your consumption patterns. I recommend choosing a reputable brand for better precision and insights to help you save on bills.
Can These Monitors Detect Specific Appliances or Just Overall Usage?
Home energy monitors can do both—they track overall usage and often identify specific appliances. Many use advanced algorithms to detect unique energy signatures, helping me see which devices consume the most power. This feature is especially useful for pinpointing energy hogs and saving money. While some monitors excel at appliance detection, others focus mainly on total consumption. It’s worth checking each model’s capabilities to find the best fit for your needs.
How Easy Is Installation for Non-Technical Homeowners?
Imagine assembling a puzzle—some pieces fit easily, others need patience. That’s how I felt installing my home energy monitor. For non-technical homeowners, most models are straightforward with step-by-step guides, often taking just 15-30 minutes. I found that following clear instructions and turning off the power briefly made setup smooth. Overall, with a little patience, you’ll be up and running without needing technical skills.
Do Energy Monitors Require Ongoing Subscription Fees?
You might wonder if energy monitors need ongoing subscriptions. From my experience, most top models don’t require monthly fees; they’re a one-time purchase. Some advanced features, like detailed analytics or cloud storage, might have optional subscriptions, but they’re not necessary for basic monitoring. I recommend checking each product’s details before buying, but overall, I’ve found energy monitors are affordable and don’t lock you into recurring costs.
Are These Monitors Compatible With Smart Home Systems?
Imagine seamlessly integrating your energy monitor with your smart home system, making control effortless. Many modern monitors are compatible with popular platforms like Alexa, Google Assistant, or Apple HomeKit, allowing you to check energy use with a simple voice command. However, compatibility varies, so I always recommend checking the specific model’s details. This way, you can enjoy smarter, more efficient living without surprises.
Conclusion
Choosing the right home energy monitor can feel overwhelming, but it’s all about finding what fits your needs. Think of it like picking shoes—you want comfort, fit, and style. For example, if you want real-time updates, the Sense Energy Monitor is like a sneaker that adjusts to your pace. With the right monitor, you’ll see your bills shrink over time, making energy savings both simple and rewarding.
