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Carlo Gavazzi EM540DINAV23XS1X vs Carlo Gavazzi EM111DINAV81XS1PFB

Install fit
Phase support 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. Single-phase two-wire, 230 V L-N, 50 Hz; AV8 nominal-voltage range is -30% to +20% (161-276 V L-N).
Installation Indoor 3-module DIN-rail direct-connected installation by a qualified electrician; IP40 front and IP20 terminals inside a suitable panel. Indoor 1-module DIN-rail direct-connected installation by a qualified electrician; IP51 front and IP20 terminals inside a suitable cabinet.
Measurement Direct-connected multiphase TRMS measurement with separate imported/exported active and reactive energy, per-phase values, demand and THD. Single-phase direct-connected active/reactive energy and electrical-variable metering with separate consumption and generation registers.
Max current 65 A 45 A
Meter fit
Accuracy class Class 1 active energy; Class 2 reactive energy; exact X SKU is non-MID Class 1 active energy; MID Class B active energy; Class 2 reactive energy
Current sensing Direct connection 5(65) A; no external current transformer 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.
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 vendor cloud is required; measurement, display, configuration, and data access operate locally through the meter and RS-485 Modbus RTU.
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. 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.
Source check
Last verified Sep 8, 2026 Sep 17, 2026
Product page Official page Official page
Documentation Official docs Official docs
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