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Carlo Gavazzi EM540DINAV23XS1X vs Schneider Electric Acti9 iEM3155

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