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Ships within 48 hours · Estimated delivery Jul 20 - Jul 25
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For Your Every Summer RSVP, with Code: SUMMER15
Description
Refoss Smart Home Energy Monitor, Native Open API & Web UI (No Cloud Required), Real Time Electricity Usage Monitor, Power Consumption Meter Works with Home Assistant & MQTT, Solar Net Metering, ETLLOCAL CONTROL & DATA PRIVACY: Access your home energy monitor data locally via Built in Web UI, Open API, and MQTT without relying on cloud services. Unlike cloud dependent monitors, Refoss ensures your data stays within your home network. Direct local access protects your privacy while giving you 100% full control of your home energy system even during internet outages. NATIVE HOME ASSISTANT & OPENCLAW AI: Experience seamless Native Home Assistant
- LOCAL CONTROL & DATA PRIVACY: Access your home energy monitor data locally via Built-in Web UI, Open API, and MQTT without relying on cloud services. Unlike cloud-dependent monitors, Refoss ensures your data stays within your home network. Direct local access protects your privacy while giving you 100% full control of your home energy system even during internet outages.
- NATIVE HOME ASSISTANT & OPENCLAW AI: Experience seamless Native Home Assistant integration right out of the box—no firmware flashing or complex coding required. Featuring ✨NEW✨ OpenClaw Support, it enables AI-driven automation for smarter, real-time energy management and seamless smart home control.
- MAXIMIZE SOLAR & ZERO FEED-IN AUTOMATION: Designed for solar homes, the power monitor works with the Refoss app and Home Assistant to automatically use surplus solar power. Appliances like EV chargers, washing machines, and water heaters are powered during midday peaks, maximizing solar self-consumption and reducing low-value electricity feed-in to the grid. Optimizes usage and reduces bills.
- REAL-TIME MONITORING & ±1% ACCURACY: Monitor voltage, current, active power, and power factor of major appliances. Provides ±1% accuracy (200A: 2–200A; 60A: 1–60A) and ±2% at low current. Daily data stored up to 5 years and exportable. With no subscriptions or hidden fees, you get deep historical insights to help you identify every energy-saving opportunity and save 10–20% on monthly bills.
- SMART ALERTS & CIRCUIT-LEVEL CONTROL: Set usage targets for each individual circuit and receive instant alerts when appliances exceed normal consumption. Refoss app supports automation and peak management to optimize schedules, reduce peaks, and improve efficiency. Real-time electricity usage monitor for circuit-level insights.
- ETL CERTIFIED & NON-INVASIVE INSTALLATION: ETL certified and compliant with UL 61010 safety standards for safe installation and operation. Supports 2 main circuit sensors (2–200A each) and 16 branch sensors (1–60A each) with easy clamp-on installation. Fits most home circuit panels and includes a 2-year warranty with responsive support for reliable long-term monitoring.
Product description
See whole-home power in one clear system. Without this granularity, you are guessing. You might know your bill is high, but you won’t know that an aging garage refrigerator is drawing excessive power 24/7, or that a “vampire load” is adding $10 to your bill every month while devices are “off.”
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Data Privacy Is a Non-Negotiable for You
Supports JSON-RPC 2.0 via HTTP, Webhooks, MQTT for seamless data exchange and smart device control.
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100% Local Control — Never Leaves Your Network
Manage your devices from anywhere via browser without any app required.
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16 Channels Monitor All Home Circuits
Monitor home energy use: 2x200A mains + 16x60A branches, track device use from AC to EV chargers.
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See Every Appliance’s Energy Use
Track monthly energy use and cost by device. Find high-energy users and cut your bills.
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Net Metering for Solar
Monitor solar or wind output in real time. Track self-generated power and feed-in energy accurately.
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Set Limits to Prevent Excessive Use
Set power limits for devices. Get instant alerts to spot unusual use and avoid extra costs.
Certified, Reliable, and Built for Home Use
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ETL Certified for Safety
ETL certified, UL 61010 compliant, high-quality clamp-on CTs, built for long-term home use.
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Energy Monitor Size
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Circuit Sensor Size
- The Refoss Smart Home Energy Monitor is built for the Total System Health enthusiast — someone who values privacy.
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Does the Refoss EM16P work without Home Assistant?
Yes, it works standalone with its own app for real-time circuit data, history, and solar monitoring. Home Assistant integration is optional but adds automations, custom dashboards, long-term logging, and circuit-level triggers.
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Why is my electricity bill so high?
Appliances like refrigerators, dryers, or EV chargers quietly use a lot of power. This smart power tracker monitors real-time usage per circuit, helping identify high-energy devices and reduce electricity costs by 10–20%.
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I don’t want my energy data sent to the cloud. Is it safe?
Yes. All data stays local. Access and manage it via Web UI or local API—no cloud, full control, and easy integration for smart home or automation setups.
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Am I wasting solar energy?
Excess solar power often goes unused. A solar power optimizer tracks solar production and automatically directs surplus energy to appliances such as heat pumps or dishwashers, boosting self-consumption and reducing electricity costs.
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How can I spot energy-hungry or faulty appliances?
The fastest way to get an ROI is eliminating Vampire Loads — devices that draw power even when “off.” Refoss alerts you to unusual or peak consumption so you can fix them before they drive up costs.
Technical Specifications
| Channels | 2 main circuits (Max. 200 A) + 16 branch circuits (up to 60 A per branch) |
| Accuracy | 200A CT: ±1% (2–200A), ±2% (1–2A), ±5% (0–1A); 60A CT: ±1% (1–60A), ±2% (0–1A) |
| Local Storage | Minute-level data, up to 7 days |
| Cloud Storage | Daily: up to 5 years; Hourly: up to 2 years; Minute: up to 2 months |
| Data Export | Free data export via Refoss cloud |
| Open API | Supports MQTT, HTTP, JSON-RPC, WebSocket & Webhooks for seamless device integration |
| Home Assistant | Smart home automation, solar management, and EV charging with Home Assistant |
| Refoss App | App supports automation rules, channel merging, CT inversion, peak demand |
| Solar | Solar PV monitoring & net metering support |
| Measurements | Voltage, Current, Active & Reactive Power, Energy, Power Factor |
| Connectivity | 2.4 GHz Wi‑Fi + Bluetooth for setup and communication |
| System Compatibility | Single-phase, 2-wire; Single-split phase, 3-wire; 3-phase, 4-wire Wye systems with earthed neutral (TN or TT, no Delta) |
| Antenna | High-gain external antenna for stronger Wi-Fi reception |
| Processor | High-performance ESP32-D0WDR2-V3 CPU, 100–240V~, 50/60Hz |
| After-sales Service | Lifetime |
| Safety | ETL Certified, UL 61010, FCC, IC, RoHS, CPF |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy