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OpenEnergyMonitor emonTx6 vs Carlo Gavazzi EM530

Install fit
Phase support Single-phase and 3-phase 4-wire AC monitoring. Two-phase and three-phase systems up to 415 V L-L.
Installation Wall-mounted wireless CT monitoring node used with emonVs voltage sensor and clip-on CT sensors. DIN-rail energy analyzer for electrical-panel installation with external current sensors.
Measurement CT-based six-channel AC electricity monitoring expander for OpenEnergyMonitor systems. Two- and three-phase energy analyzer for consumption and generation/import-export measurement.
Max current 200 A 10000 A
Nominal voltage Unknown 120-240 V L-N / 208-415 V L-L
Meter fit
Accuracy class Unknown Class B MID active energy; Class 0.5S kWh family positioning.
Current sensing 6 CT inputs for 333 mV voltage-output CT sensors; official shop options include 20 A, 50 A, 100 A, and 200 A CTs. External-sensor meter: CT 5 A, 333 mV sensor, or Rogowski-coil variants are documented.
Monitoring
Protocol Unknown Modbus RTU
Local API Yes Yes
Cloud dependency No vendor cloud is required when readings are logged through local emonPi3 / emonBase / EmonCMS paths; remote EmonCMS.org posting is optional. No vendor cloud is required for core metering. EM530 exposes local wired data through RS485 Modbus RTU or M-Bus variants.
Home Assistant Yes Yes
Solar fit
Solar import/export Yes Yes
Buying context
Price range Unknown About $250-$500
Availability United Kingdom via OpenEnergyMonitor official shop; international availability depends on shop shipping, taxes, stock, and local electrical suitability. Global Carlo Gavazzi and regional distributor channels; exact EM530 variants and approvals vary by country.
Source check
Last verified Jun 16, 2026 Jun 13, 2026
Product page Official page Official page
Documentation Official docs Official docs
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