Sonoff Stackable Power Meter

The Sonoff SPM is exactly what you are looking for when it comes to controlling and monitoring your home, office or shop. 

**Note: You will need a Master SPM unit and at least one 4-Relay Slave, they do not work separately. 

This stackable relay system allows you to control and monitor up to 128 individual channels/ circuits.

Each channel is equipped with overload protection in the form of current, power or even voltage, making it ideal for sensitive equipment.

Overload Delay can be activated, this delays your overload protection cutting the power. 0-180 seconds

The onboard SD card can store between 180-365 days of data (depending on the number of relays & size of the SD card).

Specifications SPM-Main :

Voltage Input: 100-240V~ 50/ 60Hz 50mA max

Cloud Communication: Ethernet/ WiFi

Slave Communication: RS-485

Micro SD size: 8-32GB

Dimensions: 142.5 x 90 x 66.5 mm

Specifications SPM-4Relays Slave:

Voltage Input/ Output: 100-240V~ 50/60Hz

Max Current: 20A/ channel - 80A/ total

Communication: RS-485

Dimensions: 250 x 90 x 66.5 mm