Price: $249.99 - $169.99
(as of May 21, 2026 09:49:17 UTC – Details)
From the brand
Does this home energy monitor work without internet or cloud services?
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.
Is it compatible with Home Assistant natively? Do I need to flash firmware?
Native Home Assistant integration. No flashing required.
What is Zero feed-in?
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.
What is standby power and how much does it cost?
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.
Can a home energy monitor detect HVAC problems?
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 Smart Home Energy Monitor from Refoss, a sub-brand of meross, brings smart energy management to your home. It offers local control, real-time monitoring, and Home Assistant integration for full visibility. Smart solar zero feed-in redirects surplus power to appliances, maximizing self-consumption and cutting electricity costs. ETL certified for safe, reliable, and efficient energy management.
AUDIT EVERY CENT & SLASH ELECTRIC BILLS: Stop the guesswork and start saving. By monitoring 18 individual circuits with professional ±1% precision, Refoss Home Energy Monitor shows exactly where your money goes. Identifying “energy vampires”—from HVACs to aging appliances—in real-time helps households effectively reduce monthly utility bills by 10%-20%. This smart power meter is the ultimate tool for electricity consumption audits.
LOCAL PRIVACY & MULTI-PLATFORM CONTROL: Your home energy data belongs to you, not a cloud server. Featuring a built-in Local Web UI, Open API, and MQTT, and WebSocket, Refoss ensures 100% data privacy even without internet. Seamlessly integrate with Home Assistant (via Refoss_RPC) to manage every kWh without cloud reliance or subscription fees. Ideal for a secure electricity monitor with professional local control.
SMART AUTOMATION & SOLAR ROI OPTIMIZATION: Turn your solar panels into a high-yield investment. Surplus solar and net metering energy can be directed to medium-power appliances like heat pumps, dishwashers, and microwaves, while time-of-use and peak demand energy management ensures maximum solar self-consumption, prevents low-value grid feed-in, and reduces utility bills.
5-YEAR DATA ANALYTICS & SMART FAULT ALERTS: Catch appliance failures early before they become expensive repairs. Refoss records minute/hourly/daily/weekly/monthly/yearly usage, with daily data securely stored for 5 years and fully exportable via CSV without any subscription. Receive smart alerts if a fridge or washer consumes unusually high energy, helping you optimize home power usage habits and prevent bill spikes.
STABLE SIGNAL, EASY SETUP & PRO SPECS: This system supports Single-phase, Split-phase, and 3-phase 4-wire Wye systems, featuring 2 main sensors (up to 200A) and 16 branch sensors (up to 60A). ETL certified with a 2-year warranty, it includes an external high-gain antenna for enhanced Wi-Fi stability. Most importantly: if a sensor is installed backward, simply flip the reading in the App with one tap—no need to rewire or reopen the live breaker box.