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OpenEnergyMonitor emonPi3 6-Channel Energy Monitor vs ABB B23 112-100

Energy Meter

OpenEnergyMonitor emonPi3 6-Channel Energy Monitor

OpenEnergyMonitor emonPi3

Energy Meter

ABB B23 112-100

Decision point	OpenEnergyMonitor emonPi3 6-Channel Energy Monitor	ABB B23 112-100

Install fit
Phase support	Single-phase, North American split-phase, and 3-phase 4-wire; 3-wire 3-phase unsupported.	Three-phase 3-wire and 4-wire systems; nominal 3 x 230/400 V AC.
Installation	Indoor wall mount with emonVs. CTs clip around live or neutral, not both; hardwired emonVs supply requires a suitably competent installer.	Indoor 4-DIN DIN-rail direct-connected three-phase energy meter for distribution boards and small enclosures.
Measurement	Six-channel CT-based AC electricity monitor with emonVs voltage reference for active power/energy and circuit monitoring.	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	6 CT inputs. Default: 333 mV voltage-output CTs, 20-200 A. Current-output CTs require burden-resistor solder bridges and calibration.	Direct-connected three-phase meter; B23 direct connection up to 65 A, no external CTs for B23 112-100.
Monitoring
Protocol	Ethernet / Wi-Fi / MQTT / emonCMS / 433.92 MHz OpenEnergyMonitor radio	Modbus RTU
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 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	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.	ABB global product and distributor channels; MID/IEC availability and local stock vary by country.
Source check
Last verified	Aug 20, 2026	Sep 2, 2026
Product page	Official page	Official page
Documentation	Official docs	Official docs