Product description

See whole-home power in one clear system.

Without this granularity, you are guessing.

Supports JSON-RPC 2.0 via HTTP, Webhooks, MQTT for seamless data exchange and smart device control.

Manage your devices from anywhere via browser without any app required.

Monitor home energy use: 2x200A mains + 16x60A branches, track device use from AC to EV chargers.

Track monthly energy use and cost by device. Find high-energy users and cut your bills.

Monitor solar or wind output in real time. Track self-generated power and feed-in energy accurately.

Set power limits for devices. Get instant alerts to spot unusual use and avoid extra costs.

Certified, Reliable, and Built for Home Use

ETL Certified for Safety

ETL certified, UL 61010 compliant, high-quality clamp-on CTs, built for long-term home use.

Energy Monitor Size

Circuit Sensor Size

The Refoss Smart Home Energy Monitor is built for the

Total System Health

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.

From the brand

Yes. This home energy monitor supports 100% local control with Web UI, Open API, and MQTT. All energy data is stored locally and works offline without cloud dependency, ensuring better privacy and reliability.

Native Home Assistant integration. No flashing required.

Zero feed-in means using solar power locally instead of exporting it. You can set automations with Refoss or Home Assistant to let appliances consume solar energy first.

Standby power is electricity devices draw when "off" but still plugged in. A single 75W source costs ~$97/year. Most homes have 3–6.

With Refoss EM16P, fix just two standby loads — and it pays for itself in under 2 months.

Yes. Your HVAC has a predictable baseline power draw. As components age or fail, power consumption changes.

Refoss detects unusual power consumption increases — which may indicate developing mechanical problems — before a costly breakdown occurs.

The EM16P