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HomeWizard Energy Socket vs Carlo Gavazzi EM340

Install fit
Phase support Single-phase plug-in appliance circuit; socket-region dependent. 2-/3-wire and 3-/4-wire three-phase contexts.
Installation Plug-in wall-socket energy meter and switch for compatible grounded outlets; no panel wiring or CT installation required. DIN-rail mounted direct-connected meter.
Measurement Single-appliance inline plug-in power and energy measurement with switch control. Direct three-phase import/export energy meter.
Max current 16 A 65 A
Meter fit
Accuracy class Individually calibrated; HomeWizard lists 99.5% accuracy. Class 1 kWh / Class B kWh.
Current sensing Plug-in inline socket meter; no external CTs or current clamps required. Direct connected 5(65) A; no external CTs.
Monitoring
Protocol Wi-Fi 2.4 GHz / Open API JSON / HomeWizard app RS485 / Modbus RTU
Local API Yes Yes
Cloud dependency HomeWizard app/cloud is used for normal app setup, timers, dashboards and history; local Open API access is available on the same Wi-Fi network when enabled. No vendor cloud required; RS485 Modbus RTU is local wired access.
Home Assistant Yes Yes
Solar fit
Solar import/export No Yes
Buying context
Availability European HomeWizard store markets; plug type is combined edge/pin-earth for Netherlands/Belgium style grounded sockets, with regional shipping and currency options varying by country. Global / localized Carlo Gavazzi product channels; stock and certification vary by market.
Source check
Last verified Jun 25, 2026 Jun 23, 2026
Product page Official page Official page
Documentation Official docs Official docs
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