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IAMMETER WEM3046T vs ABB A43 312-100

Energy Meter

IAMMETER WEM3046T

Energy Meter

ABB A43 312-100

ABB A43 312-100 / 2CMA170525R1000

Decision point	IAMMETER WEM3046T	ABB A43 312-100

Install fit
Phase support	Three-phase 4-wire WYE/Star; also used by IAMMETER for single-phase-as-3-meters and split-phase scenarios.	Three-phase three-wire and four-wire systems (2- and 3-element metering)
Installation	2-pole DIN-rail meter with external xxx:5A CT wiring.	Indoor 7-module DIN-rail direct-connected installation; professional three- or four-wire panel wiring required.
Measurement	Three-phase 5 A CT-input Wi-Fi energy meter with bidirectional active energy and electrical-parameter monitoring.	Three-phase direct-connected four-quadrant meter for active/reactive/apparent energy, import/export, electrical parameters, and multi-tariff sub-metering.
Max current	Unknown	80 A
Meter fit
Accuracy class	Class 1 active energy; +/-1.0% V/I/active power.	MID Class B / IEC Class 1 active energy; Class 2 reactive energy
Current sensing	Three external CT channels; no CTs are bundled. Each input accepts a third-party CT with a 5 A secondary output and a user-selected xxx:5A primary ratio.	Direct-connected 80 A measurement; no external CT required
Monitoring
Protocol	Wi-Fi / HTTP / MQTT / Modbus TCP / RS485 Modbus RTU / Local API	RS-485 Modbus RTU / EQ Bus / infrared interface / configurable pulse-alarm I/O
Local API	Yes	Yes
Cloud dependency	Optional IAMMETER Cloud; local HTTP, MQTT, Modbus TCP/RTU and third-party server modes are supported.	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	Global IAMMETER online store availability; local warehouse and reseller stock vary by region.	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 31, 2026	Aug 12, 2026
Product page	Official page	Official page
Documentation	Official docs	Official docs