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Eastron SDM320C-LR vs Carlo Gavazzi EM340

Install fit
Phase support Single-phase two-wire 1P2W AC systems. 2-/3-wire and 3-/4-wire three-phase contexts.
Installation Indoor DIN-rail mounted direct-connected single-phase meter. DIN-rail mounted direct-connected meter.
Measurement Single-phase direct-connected LoRaWAN import/export energy meter. Direct three-phase import/export energy meter.
Max current 100 A 65 A
Meter fit
Accuracy class Active energy Class 1 / Class B; reactive energy Class 2. Class 1 kWh / Class B kWh.
Current sensing Direct-connected whole-current meter; no external CTs required. Direct connected 5(65) A; no external CTs.
Monitoring
Protocol LoRaWAN 1.0.2 / digital input RS485 / Modbus RTU
Local API No Yes
Cloud dependency No Eastron vendor cloud is required, but remote telemetry depends on a compatible LoRaWAN gateway/network server rather than a direct local IP API. No vendor cloud required; RS485 Modbus RTU is local wired access.
Home Assistant No Yes
Solar fit
Solar import/export Yes Yes
Buying context
Availability Global Eastron product range; LoRaWAN frequency plan and certification availability vary by region, including EU868, AS923, AU915 and other variants noted by Eastron. Global / localized Carlo Gavazzi product channels; stock and certification vary by market.
Source check
Last verified Jun 25, 2026 Jun 23, 2026
Product page Official page Official page
Documentation Official docs Official docs
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