Sonoff Stackable Power Meter realizes smart management with overload protection, metadata monitoring and electricity statistics. The SPM-Main communicates with the cloud through Ethernet or Wi-Fi, and communicates with the SPM-4Relays through RS-485, which allows for multi-terminal and stable long-distance data transmission.
Want to know the power consumption changes of each stall? Want to realize the unified management of the whole shopping mall, or your tenants? By checking eWeLink App on your mobile phone, you can easily monitor electricity usage.
Once you enable overload protection, you can rest assured that it prevents electrical appliances from burning out, thus eliminating potential safety hazards, however, you can also set the overload delay activated to avoid spurious triggering. One SPM-Main can be connected with up to 32SPM-4Relays. Each SPM-4Relay has 4 isolated channels to help the landlord solve the problem in electric charge sharing. Each channel can support maximum current of 20A, no fear of high power load.
You can insert the SD card into SPM-Main to download and check over 180 days of your energy usage history at any time of the day through HTTP API. No need to worry about missing the important information.
**Note : You need to use the Main Unit and at least one 4-Relay together for the Stackable Power Meter to operate.
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