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Carlo Gavazzi EM540 vs Acrel ACR10R-D16TE

Install fit
Phase support 2-phase 3-wire; 3-phase 3-/4-wire including wild-leg; 120-240 V L-N, 208-415 V L-L, 45-65 Hz. Single-phase two-wire (1P2L); exact product page lists AC 100 V or 400 V rated-voltage configurations, 45-65 Hz.
Installation Indoor 3-DIN DIN-rail direct-connected energy analyzer for low-voltage switchboards. Indoor rail-mounted installation by a qualified electrician with the external split-core CT; exact D16 suffix denotes a 16 mm CT aperture.
Measurement Direct TRMS bidirectional active/reactive/apparent energy and power, demand, PF, frequency, and current/voltage THD to the 15th harmonic; non-MID XS1X. External-CT voltage, current, power, frequency, power-factor, and bidirectional active/reactive energy metering.
Max current 65 A 120 A
Meter fit
Accuracy class Class 1 active energy; Class 2 reactive energy; XS1X is non-MID. Active energy 0.5 level; reactive energy 1 level.
Current sensing Direct 5(65) A input; 0.25 A minimum and 20 mA start-up current; no external CT. External open (split-core) CT; exact D16 configuration has a 16 mm aperture and 120 A maximum current.
Monitoring
Protocol RS485 Modbus RTU RS485 Modbus RTU
Local API Yes Yes
Cloud dependency No vendor cloud required for core use; EM540DINAV23XS1X exposes local RS485 Modbus RTU data. No vendor cloud is required for display, configuration or metering; documented data access is local over RS-485 Modbus RTU.
Home Assistant Yes Yes
Solar fit
Solar import/export Yes Yes
Buying context
Availability North America, Europe and UK; XS1X carries cULus, CE and UKCA. Local stock varies. Global Acrel product range; local distributor and inverter-bundle availability varies.
Source check
Last verified Oct 3, 2026 Sep 6, 2026
Product page Official page Official page
Documentation Official docs Official docs
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