Shelly EM

What is Shelly EM?

Shelly EM is a Wi-Fi-operated energy meter with contactor control. It allows you to simultaneously monitor the consumption of any home appliances, electric circuits, and office equipment (lights, power lines, security systems, heating, cooling, etc.) in 2 circuits on the same phase or individually. Shelly EM is perfect for measuring solar energy production, monitoring household consumption, and controlling heavier-load appliances.



Wi-Fi Operated

Connect Shelly EM to your Wi-Fi network. No HUB required!

365 days of data storage

The measurements from Shelly EM are stored in a free cloud for 365 days.

Power Monitoring

Shelly ЕМ monitors monophase electrical systems with up to 2 points simultaneously.

Custom schedules

Set custom schedules based on a daily agenda or working hours.

Contactor control

Shelly EM has an integrated 10A relay output for contactor control.

Smart scenes

Set custom scenes by combining Shelly EM with your other Shelly devices.




Power supply AC 110-230V ±10%, 50/60Hz
Power supply DC No
Channels 2 Channel
Neutral required Yes
Contactor Control Yes - max 2A
Roller shutter mode No
Device temperature protection No
Overload protection No
Power measurement Yes
Operational temperature 0°C to + 40 °C
Device power consumption < 1 W
Intelligent On/Off Yes
Local and remote control Yes
Sunrise/Sunset Yes
Weekly Schedule Yes
UL Listed option No
Wireless Yes
Wi-Fi Protocol 802.11 b/g/n
Wi-Fi Radio frequency 2412 - 2484 MHz
Wi-Fi Radio signal power 1mW
Wi-Fi Range up to 50 m outdoors and up to 30 m indoors (depending on the building materials)
Size 42mm x 36mm x 14 mm

Installation of Shelly devices must be done by a qualified electrician or authorised installers.

Use Cases

Power consumption analysis for cost optimisation

Power consumption analysis for cost optimisation

All connected electrical appliances we don't use during the night or forgotten switched-on lights generate unnecessary energy. Smart energy metering will help you identify and eliminate any redundant energy consumption from each connected appliance around your home or facility.
Total power monitoring

Total power monitoring

Know how much energy your home consumes with Shelly EM! The perfect solution for one-phase homes, Shelly EM can make a large difference in your savings by constantly monitoring the overall power in your breaker box and giving you immediate control over your current consumption. Connect a contactor to Shelly EM and save energy by automatically switching off non-essential appliances.
Heavy load control with contactors

Heavy load control with contactors

Besides precise power metering, Shelly EM allows contactor control of heavy-load appliances such as powerful water heaters, hot tubs, heat pumps, and large kitchen appliances. This way, you can both monitor and control the consumption of larger appliances around your home or facility and maximize your savings.
Solar panels monitoring and control

Solar panels monitoring and control

Keep track of how much energy your solar panels and wind turbines are generating and save effortlessly. Shelly EM provides real-time information about the efficiency of the solar and wind energy system, as well as historical data on how much energy has been generated and consumed. This helps you control the energy flow, getting the most out of your solar panels and wind turbines. To take it a step further, connect a contactor to Shelly EM, so you can switch off automatically non-essential appliances in your home, in order to save energy.
Preventative monitoring

Preventative monitoring

When an electrical appliance is damaged, it doesn't simply stop working. Usually, it increases the amount of energy used in an attempt to compensate for its operational capacity. Since there is no visible difference in its performance, it might take months before you can identify a problem, leading to inefficiency and wasted energy. Shelly EM, however, will immediately report the increase in energy consumption and save you additional expenses on repairs or equipment replacement.
Full compatibility

Full compatibility

Shelly devices are compatible with Alexa, Google Home, Android and iOS. Together with the voice assistant, you can command Shelly devices using just your voice!

Download the Shelly Cloud app for Android and iOS

Download Shelly Cloud App on Apple App StoreDownload Shelly Cloud App on Google Play store


Shelly EM Power Monitor
Shelly em Smart Energy Monitor – Wiring Guide