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Carlo Gavazzi EM511DINAV81XS1PFB vs Schneider Electric Acti9 iEM3155

Install fit
Phase support Single-phase two-wire, 230 V L-N at 50 Hz (MID PFB variant). 1P+N, 3P and 3P+N; 100-277 V L-N or 173-480 V L-L, 50/60 Hz
Installation Indoor 1-module (18 mm) DIN-rail switchboard installation; direct line-and-neutral wiring by qualified personnel. Indoor 5-module (90 mm) DIN-rail direct-connected installation; IP40 front and IP20 body.
Measurement Direct-connected TRMS measurement with separate imported and exported active energy; on the PFB variant, total kWh+ and kWh- are the MID-certified registers. Direct current, voltage and active/reactive power, plus signed four-quadrant active/reactive/apparent energy for multi-tariff and submetering use.
Max current 45 A 63 A
Meter fit
Accuracy class Class 1 active / MID Class B; Class 2 reactive Class 1 active energy; Class B active energy; MID certified
Current sensing Built-in direct current path, 0.25 A minimum, 5 A base and 45 A maximum; 0.02 A start-up current; no external CT. 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 for metering or configuration; data is available locally on the display and through RS-485 Modbus RTU. No vendor cloud required for display, metering or local RS-485 Modbus RTU access; remote monitoring depends on a separate gateway, BMS or platform.
Home Assistant Yes Yes
Solar fit
Solar import/export Yes Yes
Buying context
Price range Unknown GBP 416.47 on Schneider Electric UK on 2026-10-14; regional list/transaction pricing, VAT, stock and delivery vary.
Availability Global localized Carlo Gavazzi catalogues; exact PFB model is MID-certified, with UKCA/local approval and availability to be verified by country. United Kingdom, EU/EEA, United States/Canada, Australia/New Zealand and other Schneider certification markets; ordering, price and stock vary by country.
Source check
Last verified Sep 16, 2026 Oct 14, 2026
Product page Official page Official page
Documentation Official docs Official docs
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