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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; AV8 nominal-voltage range is -30% to +20% (161-276 V L-N). 2P 3-wire, 3P 3-wire, 3P+N 4-wire, and 3P 4-wire delta; 120-240 V L-N / 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 measurement with separate imported/exported active and reactive energy, per-phase values, demand and THD.
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 path: 32 A rated primary, 5(45) A with Ib 5 A, Imin 0.25 A and Imax 45 A. The 45 A use case requires 6 mm2 wiring and local compliance; 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 sales network; the exact PFB SKU carries CE and MID for Europe plus UKCA for the United Kingdom. Stock, fiscal-metering acceptance and distribution 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 Sep 17, 2026 Sep 8, 2026
Product page Official page Official page
Documentation Official docs Official docs
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