You can use the Sonoff Dual Channel or 4CH device, along with a contactor for each load.
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Sonoff SPM Stackable Power Meter Main Unit
The main controller for a full smart power monitoring system in your electrical panel — track and control up to 128 circuits from your phone.
32 $
What people use it for
Out of stock
Good to know
- Max load: 20A per channel — 80A total per unit.
- The SPM 4Relay module is sold separately — you need at least one to use this.
- Requires a neutral wireThe third wire in your electrical box, usually blue or gray. Not all homes have it — an electrician can check in a few minutes. for installation.
- Turn off the power at your breaker before installation. Professional installation required — this is a panel-level device.
- Gives you per-circuit power monitoring and remote control for your whole home — useful for identifying which room or appliance uses the most electricity.
Smartio Guarantee
- Free Delivery on orders above $50
- 14-Day Exchange for unopened items
- Local Support on WhatsApp: +961 71 791 103
- Cash on Delivery available across Lebanon
🎄 Holiday Returns Extended
Orders placed between 20 November and 25 December
can be returned until 10 January.
Item must be sealed & unused. Standard return policy applies.
What people use it for
Works with:
Product Information
Sonoff SPM Main Unit — Stackable Power Meter Controller
The Sonoff SPM Main Unit is the brain of the SPM system. It connects to your Wi-Fi and communicates with the SPM 4Relay modules to provide smart control and power monitoring for your entire electrical panel.
You need one SPM Main Unit, and then add as many SPM 4Relay modules as you need (up to 32 units = 128 channels).
Key Features:
- Central Controller: Manages all connected SPM 4Relay modules from one place.
- Supports Up to 32 4Relay Modules: Scale up to 128 monitored channels.
- Power Monitoring: View real-time and historical power usage for every channel via the eWeLink app.
- Overload Protection: Set safe power limits per channel.
- Memory Card Support: Save detailed consumption logs to an SD card (sold separately).
- DIN Rail Mounting: Installs directly in your electrical panel.
💡 Pro Tip: For a complete setup, you need 1 SPM Main Unit + at least 1 SPM 4Relay. Plan based on how many circuits you want to monitor — each 4Relay covers 4 circuits.
Specifications
Brand
Sonoff
Model
SPM Main Unit
Color
White
Input
100-240V~50/60Hz
Max power
20A/Gang 80A/Total Max
Dimension
142.5x90x66.5mm
Wireless connection
Wi-Fi 2.4 GHz
Working temperature
-10°C~40°C
What's in the Box
- 1x Main Unit.
- 1x 50cm RVVSP.
- 1x User Manual.
Delivery, Returns & Warranty
Delivery
Enjoy free standard delivery across Lebanon on orders over $50, or free pickup on orders over $30. We also offer same-day delivery options. For more details, visit our delivery information page.
Returns
We provide a 15-day return window for all orders, subject to certain exclusions. Please note that cash refunds are not available. For complete details, visit our return policy page.
Warranty
Our products are warranted to be free from manufacturing defects. If a product sold by us is found to be defective, we will, at our discretion, repair or replace it with a new one. Certain exclusions apply. For full details, please review our warranty policy page.
Buying a gift? Select gift-wrap at checkout (extra cost).
Sonoff SPM Stackable Power Meter
One Sonoff SPM-Main can be connected 32SPM-4Relays. Each SPM-4Relay has 4 isolated channels. Each channel can support maximum current of 20A, no fear of high power load.
Want to know the power consumption changes of each stall?
By checking eWeLink App on your mobile phone, you can monitor the electricity usage without leaving home. Through the eWeLink App, you can obtain the power consumption through a touch.
Overload Protection
Once the overload protection is enabled, you do not need to worry about electrical appliances being burned out, which helps remove potential safety hazards. In addition, you can also set the overload delay activated to avoid spurious triggering.
180-day of Energy Usage Data
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.
The SPM Main Unit is the brain of the Sonoff Stackable Power Meter system. It connects to your Wi-Fi and communicates with the 4-Relay modules to provide centralized power monitoring and control.
Yes, the Main Unit requires at least one SPM 4-Relay module connected to it. The Main Unit handles communication while the relay modules monitor and control individual circuits.
You can stack up to 32 SPM 4-Relay modules on a single Main Unit, monitoring up to 128 circuits total.
You use the eWeLink app, which is free on iOS and Android. It shows real-time power data for each monitored circuit.
This product comes with a 6-month warranty covering factory defects. If you experience any issues, contact Smartio within the warranty period.
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