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Schneider Electric Acti9 iEM3155 vs Carlo Gavazzi EM540DINAV23XS1X

Install fit
Phase support 1P+N, 3P and 3P+N; 100-277 V L-N or 173-480 V L-L, 50/60 Hz Two-phase three-wire and three-phase three-/four-wire systems; 120-240 V L-N and 208-415 V L-L, 50/60 Hz
Installation Indoor DIN-rail direct-connected installation in a suitable electrical panel by a qualified electrician; 90 mm wide, IP40 front and IP20 body. Indoor 3-module DIN-rail direct-connected installation by a qualified electrician; IP40 front and IP20 terminals inside a suitable panel.
Measurement Direct-input current, voltage, active/reactive power, and signed four-quadrant active/reactive/apparent energy measurement. Direct-connected multiphase TRMS electrical-variable and bidirectional active/reactive energy measurement with separate import/export totalizers.
Max current 63 A 65 A
Meter fit
Accuracy class Class 1 active energy; Class B active energy; MID certified Class 1 active energy; Class 2 reactive energy; exact X SKU is non-MID
Current sensing Direct input 0-63 A; no external current transformers Direct connection 5(65) A; no external current transformer
Monitoring
Protocol RS-485 Modbus RTU RS-485 Modbus RTU
Local API Yes Yes
Cloud dependency No cloud required; display and RS-485 Modbus RTU data access operate locally. Remote access depends on the separately chosen gateway or platform. No vendor cloud is required; display, keypad configuration, UCS software, and RS-485 Modbus RTU provide local operation and data access.
Home Assistant Yes Yes
Solar fit
Solar import/export Yes Yes
Buying context
Availability Europe, North America and other Schneider Electric regional markets; certification, stock and ordering vary by country. Global Carlo Gavazzi product range with localized product and sales channels; exact SKU carries CE, cULus, and UKCA approvals, while stock and suitability vary by market.
Source check
Last verified Aug 14, 2026 Aug 14, 2026
Product page Official page Official page
Documentation Official docs Official docs
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