SONOFF SPM-4Relay Smart Stackable Power Meter

The SONOFF smart stackable metering system realizes smart management with overload protection, metadata monitoring and electricity statistics It supports up to 128 channels (up to 32 SPM-4Relay modules), a maximum current of 20A per channel, allows monitoring of 180 days of electricity consumption data, and management of each channel individually The SPM-Main control panel allows 8Gb-32Gb SD memory card for secure local data storage It is a high-performance professional smart home tool for managing homes, office buildings, industrial buildings or even shopping centres, enabling energy consumption monitoring for residents or tenants
Note: module requires SPM-Main control panel, which is sold separately

Features:
The SPM-Main communicates with the cloud through Ethernet or WiFi using EWeLink app (Android, iOS), and communicates with the SPM-4Relays through RS-485, which allows for multi-terminal and stable long-distance data transmission
One SPM-Main connects up to 32 relay modules and supports up to 128 channels of 20A for control and metering
The SPM-Main control panel allows the use of 8Gb-32Gb SD memory cards for secure storage of consumption data SD cards are purchased separately
Remote on/off – you can switch all channels on and off remotely anytime, anywhere
Synchronisation status – check the actual status of the relay (on or off) using the app
Power consumption data for home equipment can be downloaded for accounting
LAN mode is supported
DIN rail mounted, like relay modules, to fit the electrical cabinet
Housing material made of flame-retardant V0 PC plastic
Protection for all channels against overload, overvoltage, overcurrent

Specifications:
Compatible with: Sonoff SPM-4Relay
Voltage: 100V~240V AC
Frequency: 50/60Hz
Current: max 50mA
Wi-Fi Frequency: 24 GHz
Wi-Fi standard: IEEE80211b/g/n
Number of channels: 4
Works with Amazon Alexa & Google Assistant
App: eWeLink (Android, IOS)
MCU: ESP32 GD32F
Dimensions: 1425x90x665 mm
Housing material: PC V0 (flame-retardant)
Mounting: on DIN rail
Connection: RS485
Operating temperature: -10°C~+40°C
Operating humidity: 5%-95% (non-condensing)
Weight: 214g
Colour: white
Certification: CE/UKCA/FCC/ROHS

Warranty: 24 months