--- product_id: 676503371 title: "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, ETL" price: "£206.95" currency: GBP in_stock: true url: https://www.desertcart.co.uk/products/676503371-refoss-smart-home-energy-monitor-native-open-api-and-web store_origin: GB region: United Kingdom --- # ±1% accuracy real-time monitoring Local control & privacy-first design Solar surplus auto-optimization 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, ETL **Price:** £206.95 **Availability:** ✅ In Stock ## Summary > ⚡ Empower your home with smart energy mastery—because every watt counts! ## Quick Answers - **What is this?** 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, ETL - **How much does it cost?** £206.95 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/676503371-refoss-smart-home-energy-monitor-native-open-api-and-web) ## Best For - Customers looking for quality international products ## Why This Product - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Solar-Powered Savings:** Automatically shift high-energy loads to peak solar production and slash your bills. - • **Plug & Play Installation:** Clamp-on sensors fit most panels with ETL certification and 2-year warranty for peace of mind. - • **Precision Energy Insights:** Track voltage, current, and power with ±1% accuracy for smarter decisions. - • **Smart Alerts & Automation:** Set custom thresholds and get instant notifications to optimize usage and prevent waste. - • **Privacy-First Local Control:** Access your data via Web UI and Open API without cloud dependency—your energy, your rules. ## Overview The Refoss EM16 Smart Home Energy Monitor delivers ultra-accurate, real-time tracking of your home's electricity usage with ±1% precision. Designed for privacy-conscious users, it offers local control through Web UI, Open API, and MQTT, eliminating cloud reliance. Perfect for solar homes, it intelligently maximizes solar self-consumption by automating high-energy appliances during peak production. ETL certified and easy to install with clamp-on sensors, it supports up to 2 main circuits and 16 branch circuits, providing detailed historical data and smart alerts to help you save 10–20% on electricity bills while maintaining full control and security. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0DJNV3GPR | | Batteries Included? | No | | Batteries Required? | No | | Best Sellers Rank | #271,949 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #41 in Home Automation Modules | | Color | Orange+White | | Customer Reviews | 4.4 4.4 out of 5 stars (211) | | Date First Available | October 31, 2024 | | Included Components | Home Energy Monitor, WiFi Antenna Assembly, 200A Current Transformers x 2, 60A Current Transformers x 16, 3.5mm Insulation Plugs x 2, 2.5mm Insulation Plugs x 16, Wire Nuts x 3, Extra Wires x 3, Wire Harness, User Manual | | Item Package Quantity | 1 | | Item Weight | 4.27 pounds | | Item model number | EM16 | | Manufacturer | Refoss | | Part Number | EM16 | | Product Dimensions | 4.5 x 3.48 x 1.1 inches | ## Images ![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, ETL - Image 1](https://m.media-amazon.com/images/I/71BkferqpzL.jpg) ## Questions & Answers **Q: Does the Refoss EM16P work without Home Assistant?** A: 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. **Q: Why is my electricity bill so high?** A: 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%. **Q: I don’t want my energy data sent to the cloud. Is it safe?** A: 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. **Q: Am I wasting solar energy?** A: 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. **Q: How can I spot energy-hungry or faulty appliances?** A: 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. ## Frequently Bought Together - Smart Home Energy Monitor Supports Home Assistant, Real-Time Accurate Energy Consumption Tracking, Electricity Usage Monitor with 16x60A Circuit Sensors, 36-Month History, Solar Metering, 2.4G - Upgraded Watt Power Meter Plug Home Electrical Usage Monitor Consumption, Energy Voltage Amps Kill Tester with Backlight, Overload Protection, 7 Modes Display --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/676503371-refoss-smart-home-energy-monitor-native-open-api-and-web](https://www.desertcart.co.uk/products/676503371-refoss-smart-home-energy-monitor-native-open-api-and-web) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-06-10*