SONOFF Smart Stackable Power Meter
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【UP to 32 SPM-4Relays】One SPM-Main connects up to 32 SPM-4Relays. Each relay includes 4 isolated channels for organized and scalable device control.
【20A per Channel】Each channel supports up to 20 amps, making it ideal for high-power devices.
【Overload Protection】Automatically cuts off power during overloads to protect your devices and ensure system safety.
【MicroSD Storage】Store over 20 years of power data and up to 20,000 operation logs per device. Quickly export consumption reports via SD card.
【Power Monitoring】Track real-time current, voltage, and power usage through the eWeLink app for smarter energy management.
Technical details, troubleshooting or setup tips? Access the SPM knowledge center for all the info you need.
Specs & User Manual
SONOFF SPM is a smart, stackable power monitoring system that can control up to 128 channels by connecting to 32 SPM-4Relays. Each channel handles up to 20A, perfect for managing high-power devices. Real-time monitoring of current, voltage, and power is available in the eWeLink app. With microSD storage for over 20 years of data logging and built-in overload protection, it’s ideal for secure, organized energy management.
User Manual (PDF)SPM
802.11 b/g/n 2.4GHz
8GB-32GB
100-240V~ 50/60Hz 20A/Gang 80A/Total Max
100-240V~ 50/60Hz 20A/Gang 80A/Total Max
White
PC V0