The Shelly Pro 3EM:

The Shelly Pro 3EM is a WiFi powered, DIN mountable 3-phase power meter with WiFi, Bluetooth and LAN connectivity. With its 1% active energy measurement accuracy, the Shelly Pro 3EM can be used to individually monitor the consumption of all household appliances, circuits and office equipment. Historical data is stored for up to 60 days, with each phase having a one-minute resolution. In addition, the scripting functionalities allow the execution of complex scenarios and offer expanded monitoring options.

Can measure up to 120A for each phase and neutral
4-quadrant measurement with multiple connection types
Class B accuracy for active energy (compliance with IEC 62053-21 based on manufacturer testing)
Suitable for photovoltaics
Detection of errors in the phase sequence (option)
Optical pulse display of energy consumption
Measuring accuracy up to 1%
Storage that can be accessed at 1-minute intervals for up to 60 days


Shelly Pro 3EM-400:

Shelly Pro 3EM-400 is a three-phase DIN rail mounted energy meter. It has been enhanced with all the flexibility of gen2 firmware and LAN connectivity, providing professional integrators with additional options for end-user solutions. Shelly Pro 3EM-400 displays accumulated energy as well as instantaneous voltage, current and power factor per phase in real time.

Can measure up to 400A for each phase and neutral
4-quadrant measurement with multiple connection types
Class B accuracy for active energy (compliance with IEC 62053-21 based on manufacturer testing)
Suitable for photovoltaics
Detection of errors in the phase sequence (option)
Optical pulse display of energy consumption
Measuring accuracy up to 1%
Storage that can be accessed at 1-minute intervals for up to 60 days