Frequently asked questions

• What is the difference between Shelly 3EM-63T and 3EM-63W Gen3?

  The -63T (Terminal) variant measures through internal terminals, with the phase conductor passing through the device's Ø8 mm aperture. The -63W variant uses split clamps that wrap around existing cables, making it better for retrofit without disconnecting them.
• What maximum current does the Shelly 3EM-63T Gen3 support per phase?

  The meter measures from 0 to 63 A on each of the three phases, with saturation up to 130 A. External 63 A protection with a B or C characteristic is recommended.
• What measurement accuracy does the Shelly 3EM-63T Gen3 have?

  The device has Class B accuracy for active energy, voltage error below +/-1% and current error of +/-1% across the 2-63 A range.
• Which smart home systems is the Shelly 3EM-63T Gen3 compatible with?

  It connects over 2.4 GHz WiFi and Bluetooth 4.2 and integrates with the Shelly app, Home Assistant, Google Home, Amazon Alexa and the eWeLink/Shelly Cloud platform, plus local MQTT, HTTP and WebSocket APIs.
• Does the Shelly 3EM-63T Gen3 replace the energy supplier's official meter?

  No. It is a monitoring tool for your own consumption and does not replace the supplier's fiscal meter. The displayed data is for information and consumption optimization.
• How is the Shelly 3EM-63T Gen3 installed in the panel?

  It mounts in the three-phase electrical panel, above or below the circuit breakers on the DIN rail, powered at 220-240 V~ between phase and neutral. Installation should be carried out by a qualified electrician.