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Carlo Gavazzi EM511DINAV81XS1PFB vs Carlo Gavazzi EM540DINAV23XS1X

Install fit
Phase support Single-phase two-wire 120-240 V L-N 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 DIN-rail switchboard installation Indoor 3-module DIN-rail direct-connected installation by a qualified electrician; IP40 front and IP20 terminals inside a suitable panel.
Measurement Direct-connected bidirectional energy and electrical-variable measurement 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 / MID Class B; Class 2 reactive Class 1 active energy; Class 2 reactive energy; exact X SKU is non-MID
Current sensing Direct connected 5(45) A; 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 for metering or configuration; data is available locally on the display and through 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 product and sales-network routes across Europe, the Americas and Asia-Pacific; approvals and availability 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 12, 2026 Aug 14, 2026
Product page Official page Official page
Documentation Official docs Official docs
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