Refoss Smart Home Energy Monitor with Open API, Home Assistant, No Cloud
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- EM16P MODEL & 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.
- 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.
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Estimated shipping
Select a product to estimate shipping.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.”
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.
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%.
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.
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.
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
Product details
| Main Specification | |
|---|---|
| Included Components | User Manual or Home Energy Monitor or WiFi Antenna Assembly or 200A Current Transformers x 2 or 60A Current Transformers x 16 or 3.5mm Insulation Plugs x 2 or 2.5mm Insulation Plugs x 16 or Wire Nuts x 3 or Extra Wires x 3 or Wire Harness |
| Manufacturer | Refoss |
| Brand | Refoss |
| Item Package Quantity | 1 |
| Product Dimensions | 4.5 x 3.5 x 1.1 inches |
| Colour | Orange+White |
| Item Weight | 4.24 pounds |
| Product information | |
| Item model number | EM16P |
| Technical Details | |
| Part Number | EM16P |
| Others | |
| Date First Available | 2024 or October 31 |
| Product Type | Modules |