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Carlo Gavazzi EM24 vs Acrel ADL400

Install fit
Phase support 1P2W, 2P3W, and 3P4W; the IS variant is excluded from 3P3W by the official wiring table. Three-phase three-wire and three-phase four-wire systems.
Installation Indoor 4-DIN-module DIN-rail direct-connected installation in a low-voltage switchboard. DIN-rail mounted three-phase energy meter; direct and CT wiring variants are documented.
Measurement Direct electrical-variable plus import/export active and reactive energy metering over local RS485 Modbus RTU. Three-phase Modbus energy meter measuring electrical parameters, active/reactive energy, and forward/reverse energy.
Max current 65 A 80 A
Meter fit
Accuracy class Active energy Class 1; reactive energy Class 2. Exact X-suffix model is non-MID. Active energy Class 0.5; reactive energy Class 2.
Current sensing Direct 10(65) A AV9 input; no external CTs. 65 A is the continuous maximum. Acrel documents 3 x 1(6) A and 3 x 10(80) A input-current variants, with direct-connect and CT wiring examples.
Monitoring
Protocol RS485 Modbus RTU RS485 Modbus RTU
Local API Yes Yes
Cloud dependency No vendor cloud required for core metering; local RS485 Modbus RTU access through compatible hardware or software. No vendor cloud required for core metering; ADL400 exposes local RS485 Modbus RTU for SCADA, EMS, gateways, or automation systems.
Home Assistant Yes Yes
Solar fit
Solar import/export Yes Yes
Buying context
Availability Carlo Gavazzi global product channels; country pages, certification, stock, and distributor availability vary by region. Global Acrel product range with direct quote/contact routes; local distributor availability and certification context vary by market.
Source check
Last verified Aug 28, 2026 Jul 21, 2026
Product page Official page Official page
Documentation Official docs Official docs
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