Refoss Smart Home Energy Monitor — Local Control, Open API & Real-Time Power Usage

Refoss Smart Home Energy Monitor: Local Control, Private Data, Real-Time Insight

Meet Refoss, a compact energy monitor designed to illuminate how electricity moves through your home without sending data to the cloud. With a built-in Web UI, an Open API, and MQTT, your energy data stays on your local network. This setup remains reliable during internet outages and gives you direct visibility and control over your energy system.

Whether you’re curious about daily usage patterns or optimizing a solar setup, Refoss puts you in the driver’s seat with privacy-forward technology and accessible tools that don’t require subscriptions or external services. Expect rich historical context and flexible integration options that empower you to tailor automation around your routines and devices.

Local control & data privacy

• Built-in Web UI for on-device access without cloud involvement
• Open API and MQTT connectivity to integrate with other smart home systems
• No cloud dependency, preserving privacy and resilience during outages
• Local data storage and exporting options for personal analysis

In day-to-day use, you’ll notice a calm, no-fuss experience. The interface presents clear graphs and live metrics that help you notice how power flows as you run appliances, charge an EV, or heat water during peak daylight.

Native Home Assistant & OpenClaw AI

The monitor works out of the box with Native Home Assistant, eliminating firmware flashing or complex coding. The latest OpenClaw AI support enables smarter, real-time automation, helping you orchestrate energy use across devices as conditions change in real time.

Maximize solar & zero feed-in automation

Designed for solar-powered homes, Refoss supports automatic self-consumption via the Refoss app and Home Assistant. Surplus solar energy can be allocated to high-demand loads—like EV charging, laundry, or water heating—during midday peaks, reducing reliance on the grid and helping you realize the potential of your solar investment.

Real-time monitoring & accuracy

Track voltage, current, active power, and power factor with impressive accuracy. The system advertises ±1% accuracy on typical ranges (200A: 2–200A; 60A: 1–60A) and ±2% at low current. Data is stored daily for up to five years and can be exported for deeper analysis. No hidden fees, just robust data to inform energy-saving opportunities.

• Real-time visibility into how each circuit consumes energy
• Reliable long-term data without ongoing subscriptions
• Historical insights to spot trends and opportunities

Smart alerts & circuit-level control

Set usage targets for individual circuits and receive instant alerts when consumption spikes. The Refoss app supports automation and peak management, helping you optimize schedules and reduce peaks with practical, actionable guidance.

ETL certified & non-invasive installation

ETL certified and UL 61010 compliant, Refoss offers a safe, non-invasive setup with clamp-on sensors. It supports two main circuit sensors (2–200A each) and up to 16 branch sensors (1–60A each), fitting most home panels. A two-year warranty adds peace of mind and reliable support for ongoing monitoring.