Sonoff SPM-Main Smart Switch

Sonoff SPM-Main smart switch that measures power consumption and supports both Ethernet and Wi-Fi connectivity. It can handle up to 128 channels - combine it with up to 32 SPM-4Relay switches (4 channels each), which are available for purchase separately. What's more, overload protection avoids damaging your devices. The product is also very easy to install.

The SPM-Main switch is suitable for a wide variety of applications. Thanks to it, you can check, for example, how much electricity your tenants consume per month, you will also find out what is the energy consumption in a shopping center or office. The product will also be useful in a server room or in a cryptocurrency mine - the overload protection function will allow you to avoid damaging specific devices.

Take advantage of the ability to connect devices. SPM-Main communicates with the cloud via Ethernet or Wi-Fi. It also connects to SPM-4Relay switches via RS-485, so it can provide stable transmission over long distances. Connection problems are a thing of the past!

Want to check changes in energy consumption in every room in the office? Or maybe you want to know how much electricity your tenants consume? With Sonoff it's possible! The SPM-Main and SPM-4Relay switches enable precise measurement of energy consumption. You will find all the information in the eWeLink app. So you can check your power consumption without leaving home - just reach for your phone!

Increase security in the server room and do not be afraid of damaging your devices. The switch offers an overload protection function. When you activate it, the equipment will be automatically turned off when the current, voltage or power reaches the value indicated in the application. A load delay function is also available.

One SPM-Main module allows you to control up to 32 SPM-4Relay switches. What's more, each SPM-4Relay offers up to 4 independent channels with a maximum load of 20 A each. This means that SPM-Main can handle up to 128 channels! Thanks to this, it is ideally suited, for example, in a block of flats, enabling checking the energy consumption of tenants of rented apartments.

Now you can save the history of your energy measurements for the last 180 days. The switch is equipped with an SD card slot (8-32 GB, SDHC). Thanks to this, it allows you to conveniently export data and gives you the confidence that you will not lose any important information. Installing the SPM-Main and SPM-4Relay switches will not cause you any problem either. You can easily mount them on the guide rail. Note: SD card not included.