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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. Indoor 4-module (72 mm) DIN-rail installation by a qualified electrician; the ADL400 family documents direct-connected and external-CT wiring variants.
Measurement Direct electrical-variable plus import/export active and reactive energy metering over local RS485 Modbus RTU. Three-phase 3P3W/3P4W electrical-parameter, 1st-31st harmonic, and bidirectional active/reactive energy measurement over local RS485 Modbus RTU.
Max current 65 A 80 A
Meter fit
Accuracy class Class 1 active; Class 2 reactive; V/I 0.5%; P/S 1%. Active energy Class 0.5; reactive energy Class 2; MID/CE listed.
Current sensing Direct AV9 input, 10 A base, 65 A maximum, 0.5 A minimum and 0.04 A start; no external CT. Two documented input variants: 3 x 10(80) A and 3 x 1(6) A, with separate direct-connect and external-CT wiring diagrams; confirm the ordered input variant.
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 Oct 7, 2026 Sep 5, 2026
Product page Official page Official page
Documentation Official docs Official docs
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