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【Split Core Current Transformer – Non-Invasive & Safe Monitoring】Measure current up to 100A with a split-core clamp design — no need to touch live wires. Just snap the CT sensor open or closed via side latches for quick and safe installation, ideal for both DIYers and professionals.
【Real-Time Energy Monitoring – Room or Circuit Level Insight】Install POWCT in your home’s electrical panel to monitor power usage by room, circuit, or heavy-duty appliances. Identify energy waste, optimize power consumption, and gain full control over your electricity usage.
【Track Exported Power to the Grid – Optimize Solar Efficiency】POWCT is more than just an energy monitor—it’s a smart solution for tracking bidirectional power flow, including energy exported back to the grid. When integrated with solar inverters or battery storage systems, it provides real-time data on surplus electricity generation, helping you maximize self-consumption, reduce waste, and improve your return on investment from solar power.
【6-Month Historical Power Data – Auto Save & Exportable】Review hour-level electricity data for up to 6 months, and you can export it as files for energy analysis or reporting.
【Dry Contact Relay – Contactors & Load Control Supported】Equipped with a 2A dry contact output, POWCT can be connected to an external contactor to switch large electrical loads on or off. Perfect for industrial applications or smart energy management systems.
Technical details, troubleshooting or setup tips? Access the POWCT knowledge center for all the info you need.

Specs & User Manual
SONOFF POWCT is a smart energy monitor with a 100A split-core CT sensor for safe, non-invasive installation. Track real-time power usage by room, circuit, or appliance—ideal for home or industrial setups. Supports solar energy monitoring with bidirectional flow tracking. Includes 6-month history, and dry contact relay for external contactor switching of large electrical load controls.
User Manual (PDF)POWCT
100-240V~50/60Hz 2W
Wi-Fi IEEE 802.11 b/g/n 2.4GHz
SMA
RJ9
0-100A
CAT II 0-100A 300V-MAX
White
PC
Indoor
-40℃~50℃
5%~95%RH, non-condensing
15mm Max