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OpenEnergyMonitor emonTx6 vs ABB B23 112-100

Install fit
Phase support Single-phase and three-phase four-wire AC; three-phase three-wire is unsupported. Three-phase 3-wire and 4-wire systems; nominal 3 x 230/400 V AC.
Installation Wall-mounted node with external emonVs voltage/power sensor and clip-on CTs; competent panel installation required. Indoor 4-DIN DIN-rail direct-connected three-phase energy meter for distribution boards and small enclosures.
Measurement Six-channel continuous-sampling CT measurement of real/reactive power and cumulative energy. Direct-connected three-phase active-energy meter with RS485 Modbus RTU / EQ Bus and pulse or alarm output.
Max current 200 A 65 A
Meter fit
Accuracy class Unknown Active energy Class B / Class 1.
Current sensing Six inputs for 333 mV voltage-output CTs; official 20 A, 50 A, 100 A, and 200 A options. Direct-connected three-phase meter; B23 direct connection up to 65 A, no external CTs for B23 112-100.
Monitoring
Protocol 433.92 MHz radio / USB-C serial / optional emonWiFi Wi-Fi and MQTT Modbus RTU
Local API Yes Yes
Cloud dependency No vendor cloud required; local radio, USB serial, optional emonWiFi, EmonCMS, ESPHome, Home Assistant and MQTT paths. EmonCMS.org is optional. No ABB cloud required for core metering; B23 112-100 exposes local RS485 Modbus RTU / EQ Bus data when connected to compatible equipment.
Home Assistant Yes Yes
Solar fit
Solar import/export Yes Yes
Buying context
Price range Unknown About $150-$300
Availability UK official shop; international shipping varies by destination, tax, radio rules and electrical suitability. ABB global product and distributor channels; MID/IEC availability and local stock vary by country.
Source check
Last verified Aug 30, 2026 Jul 17, 2026
Product page Official page Official page
Documentation Official docs Official docs
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