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OpenEnergyMonitor emonPi3 6-Channel Energy Monitor vs ABB A43 312-100

Install fit
Phase support Single-phase, North American split-phase, and 3-phase 4-wire; 3-wire 3-phase unsupported. Three-phase three-wire and four-wire systems (2- and 3-element metering)
Installation Indoor wall mount with emonVs. CTs clip around live or neutral, not both; hardwired emonVs supply requires a suitably competent installer. Indoor 7-module DIN-rail direct-connected installation; professional three- or four-wire panel wiring required.
Measurement Six-channel CT-based AC electricity monitor with emonVs voltage reference for active power/energy and circuit monitoring. Three-phase direct-connected four-quadrant meter for active/reactive/apparent energy, import/export, electrical parameters, and multi-tariff sub-metering.
Max current 200 A 80 A
Meter fit
Accuracy class Unknown MID Class B / IEC Class 1 active energy; Class 2 reactive energy
Current sensing 6 CT inputs. Default: 333 mV voltage-output CTs, 20-200 A. Current-output CTs require burden-resistor solder bridges and calibration. Direct-connected 80 A measurement; no external CT required
Monitoring
Protocol Ethernet / Wi-Fi / MQTT / emonCMS / 433.92 MHz OpenEnergyMonitor radio RS-485 Modbus RTU / EQ Bus / infrared interface / configurable pulse-alarm I/O
Local API Yes Yes
Cloud dependency No vendor cloud required for local Emoncms on the emonPi3; optional remote posting to Emoncms.org, MQTT, or other services. No vendor cloud is required; readings and configuration are available locally over RS-485 Modbus RTU / EQ Bus and the meter display.
Home Assistant Yes Yes
Solar fit
Solar import/export Yes Yes
Buying context
Availability Sold from the UK with international shipping offered at checkout; destination suitability depends on mains topology, emonVs option, CT selection, local electrical rules, and import taxes/fees. Global ABB product range; official localized product and distributor routes cover Europe, the Americas, Middle East/Africa, and Asia-Pacific, with stock and certification varying by market.
Source check
Last verified Aug 20, 2026 Aug 12, 2026
Product page Official page Official page
Documentation Official docs Official docs
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