Use Cases / Applications

Help users determine whether the products are suitable for a specific application scenario, and understand how to configure them for that use case.

⚡ Quick Answers

Do SPM and SDM energy sensors work with split-phase systems in USA and Canada (120V/240V)? [SPM/SDM Products]

Yes! Our sensors feature a wide voltage design (100~240V AC, 50/60Hz) making them compatible with North American split-phase systems. However, please note the following hardware specifics based on the model:

Split-Phase Model (SDM02) :

• SDM02 is specifically designed for split-phase systems. Its Wi-Fi and Zigbee models are fully compatible and works perfectly across both 120V (L1-N, L2-N) and 240V (L1-L2).

Single-Phase Models (SPM01):

• SPM01 Zigbee: Fully compatible with both 120V (L1-N, L2-N) and 240V (L1-L2).

• SPM01 Wi-Fi: Only works across L1-L2 (240V). It cannot be used on L1-N or L2-N (120V) because the 120VAC input is insufficient for the internal power supply to convert and drive the higher-consuming Wi-Fi module.

Note: For ODM customers, we offer specially designed SPM01 Wi-Fi models for 120V applications — please contact us for details.

Three-Phase Models (SPM02 & SDM01):

• We do not recommend using these for multi-circuit monitoring in North American residential applications. If you must use them, please choose the Zigbee versions (due to their lower power consumption) and avoid the Wi-Fi versions.

Does the SPM02 FLEX support measurement of three single-phase circuits? [SPM02]

• For 220–240V 50/60Hz systems: Yes — you can connect the brown, black, and gray live wires to the same phase line, and the device will measure all three single-phase circuits correctly.

• For 110–120V 50/60Hz systems: It is not supported due to internal power supply limitations.

Does SDM01 support solar export limiting (Zero Export) ? [SDM01]

Yes! The BLE + Wi-Fi + RS485 model is specifically optimized for export-limiting and energy management.

⚡ Pro Tip: For ultra-fast control (<150ms response for strict zero-export), we highly recommend the SDM01 Gen2.

Integration Methods:

• Wi-Fi (Balcony PV & ESS): Supports UDP, WebSocket, and Modbus TCP. Includes a one-click API switch for seamless Shelly 3EM Pro replacement.

• RS485 (Residential PV & ESS): In addition to its own Modbus RTU register list, the SDM01 can act as a drop-in replacement by covering the key registers of ABB B23 and Eastron SDM630.

🤝 For Equipment Manufacturers (Inverter / EVSE / ESS):

• Custom Firmware: Thanks to the dual MCU + SoC architecture, manufacturers can write their own custom SoC firmware, or simply use our standard LAN-optimized firmware.

• Integration Support: End-to-end compatibility ultimately depends on the host system. We offer maximum technical cooperation for manufacturers looking to natively integrate our meters.

🛠️ Detailed Guides