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Carlo Gavazzi EM540 vs Acrel ACR10R-D16TE

Install fit
Phase support 2-phase 3-wire; 3-phase 3-wire; 3-phase 4-wire; 4-wire delta / wild-leg. Single-phase AC metering for PV/inverter cabinet and energy-demand monitoring.
Installation Indoor 3-DIN DIN-rail direct-connected energy analyzer for low-voltage switchboards. Indoor DIN35 rail meter with external 16 mm split-core CT.
Measurement Direct consumption/generation and signed import/export measurement over local Modbus RTU; XS1X is non-MID. Single-phase external-CT multifunction energy meter for electrical parameters and active/reactive energy.
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 connection up to 65 A; no external CTs for the EM540DINAV23XS1X direct-connected model. External split-core current transformer, 16 mm through size; 120 A max current configuration shown on the official product page.
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 required for core metering; local RS485 Modbus RTU is documented.
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 Aug 25, 2026 Jul 23, 2026
Product page Official page Official page
Documentation Official docs Official docs
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