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Carlo Gavazzi EM111DINAV81XS1PFB vs Carlo Gavazzi EM540DINAV23XS1X

Install fit
Phase support Single-phase two-wire, 230 V L-N, 50 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 1-module DIN-rail direct-connected installation by a qualified electrician; IP51 front and IP20 terminals inside a suitable cabinet. Indoor 3-module DIN-rail direct-connected installation by a qualified electrician; IP40 front and IP20 terminals inside a suitable panel.
Measurement Single-phase direct-connected active/reactive energy and electrical-variable metering with separate consumption and generation registers. Direct-connected multiphase TRMS electrical-variable and bidirectional active/reactive energy measurement with separate import/export totalizers.
Max current 45 A 65 A
Meter fit
Accuracy class Class 1 active energy; MID Class B active energy; Class 2 reactive energy Class 1 active energy; Class 2 reactive energy; exact X SKU is non-MID
Current sensing AV8 direct connection: normal applications up to 32 A; 5(45) A with 45 A maximum continuous current when 6 mm² wiring and local rules permit; no external CT. 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 vendor cloud is required; measurement, display, configuration, and data access operate locally through the meter and RS-485 Modbus RTU. 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 Global Carlo Gavazzi product range with localized sales routes; exact PFB SKU carries CE, MID (Europe), UKCA, and Nordic E-number listings, while stock and approval needs vary by market. 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 13, 2026 Aug 14, 2026
Product page Official page Official page
Documentation Official docs Official docs