Sonoff
Sonoff SPM 4Relay Stackable Power Meter
4-channel power monitoring + switching module — track and control 4 circuits per unit · Stackable up to 32 modules (128 channels) · DIN rail · Needs SPM Main Unit
Monitor and control up to 4 electrical circuits from your phone — track power usage per circuit and cut costs on your electricity bill.
Sonoff
Stackable bus (via SPM Main)
Mains AC (220V)
eWeLink
$50
Cash or card on delivery — pay when it arrives
Free delivery across Lebanon on orders over $50
Out of Stock
No prepayment needed. Pay cash on delivery or by Whish — inspect your order before you pay.
Best fitted by an electrician — we can arrange installation.
Not sure it fits your setup? Ask us on WhatsApp before you buy.
Built for Lebanon's power reality
After an EDL cut: the device reconnects to Wi-Fi on its own when power returns, and the app's Power-On State setting lets you choose whether it comes back ON, OFF, or exactly as it was.
EDL + generator homes: the switchover is just a normal power cycle to the device — no resetting or re-pairing needed.
Delivery all over Lebanon
6-month Warranty
WhatsApp Support
14-day Exchange
Sonoff products customers bought together
Sonoff SPM 4Relay Stackable Power Meter
This item
2 add-ons selected · $22
How It Works
1
Confirm you have the SPM Main
The 4Relay can't run alone. If you don't have the SPM Main Unit yet, get the starter bundle (Main + 4Relay).
2
Clip onto DIN rail
Slide the 4Relay onto the DIN rail next to the SPM Main Unit. They link automatically through the stack connector.
3
Wire 4 circuits
Connect each channel's Live in/out (and shared neutral) to the circuit you want to monitor. Usually done by an electrician.
4
Name in eWeLink + set limits
Open eWeLink → SPM device. Each channel appears separately — rename to match ("Living Room AC", "Water Heater"). Set per-channel power limits for overload protection.
Is This Right for Me?
Channels: 4 (independent monitoring + switching)
Max current per channel: 20A
Stack capacity: Up to 32 modules per main unit
Mounting: DIN rail
Requires: SPM Main Unit (not included)
Power-on state: ON / OFF / Last state (per channel)
Voice: Alexa + Google Assistant (via Main)
App: eWeLink
Product Details
Sonoff SPM 4Relay — Stackable Power Meter (4 Channels)
The Sonoff SPM 4Relay is a professional-grade DIN rail (the standard metal rail inside your electrical panel/switchboard where circuit breakers are mounted) module that gives you smart control and power monitoring for 4 separate circuits. It mounts inside your electrical panel and lets you turn each circuit on or off from your phone, track power usage, and set overload protection.
Need more than 4 circuits? Stack multiple SPM 4Relays together — up to 32 units (128 channels total). Important: This module requires a Sonoff SPM Main Unit to operate.
Key Features:
- 4 Independent Channels: Control and monitor 4 circuits separately.
- Power Monitoring: Track real-time power, current, voltage, and total consumption per channel.
- Overload Protection: Set power limits — the relay cuts off automatically if a circuit exceeds the limit.
- Stackable: Connect up to 32 SPM 4Relays to one SPM Main Unit for large installations.
- DIN Rail Mounting: Installs directly in your electrical panel.
- Voice Control: Works with Google Assistant and Alexa.
💡 Pro Tip: This is ideal for offices, shops, or large homes where you want to monitor the electricity consumption of each circuit separately — like tracking how much the AC, lighting, and water heater each cost you.
What You Get
4 channels per module
Monitor and switch 4 circuits — perfect for AC, water heater, lighting, kitchen — all from one DIN-rail unit.
Live power per channel
See W, A, V, and total consumption per circuit. Daily and monthly history graphs in eWeLink.
Overload auto-cut
Set a safe power limit per channel. When exceeded, the SPM cuts that circuit automatically — protects wiring and gear.
Stackable to 32 modules
Add more 4Relays as your monitoring needs grow — one SPM Main Unit handles up to 32 modules, or 128 channels.
Per-channel voice control
Each channel becomes its own device in eWeLink — "Hey Alexa, turn off circuit 3" works at the level you want.
Common Use Cases (1)
Real scenarios Lebanese customers use this product for. Don't see yours? Message us and we'll tell you if it fits.
Works With
Amazon Alexa
Works
Google Assistant
Works
Home Assistant (via eWeLink)
Works
Control with the eWeLink app
eWeLink
Set up your Sonoff SPM 4Relay Stackable Power Meter in minutes — voice control, scenes, automations, away mode.
App Store
Google Play
What's in the Box
1× Sonoff SPM 4Relay module
DIN rail mounting clips
User manual
Delivery & Pickup
Standard Delivery
All Lebanon governorates — Greater Beirut usually next day; Tripoli, Jbeil, Saida, Tyre, Zahle, Akkar and the rest within 2–4 working days.
$4 · Free over $50
Express Delivery
Faster shipping — usually within 24 hours of order confirmation (Greater Beirut & Metn). Same-day not guaranteed.
$6 flat
Pickup — Dekwaneh
Collect from our Dekwaneh store. Weekdays 10am–5pm, Sat 10am–1pm.
$3 · Free over $30
Warranty & Support
6-month Local Warranty
Covers defects in materials & workmanship. Handled here in Lebanon.
WhatsApp Support — Always On
Can't set it up? Message us. We reply within minutes, not days.
14-day Exchange
Exchange within 14-day for a product of equal or higher value. No refunds.
Free Setup Help
Every order includes a setup guide — plus a free WhatsApp call if you ever need a hand.
Customer Reviews (1)
5.0
★★★★★ 1 review
Smartio customer
May 2026
★★★★★
✓ Verified Purchase
Frequently Asked Questions
Can it work without the SPM Main Unit?
›
No — the 4Relay needs the SPM Main Unit to connect to Wi-Fi and eWeLink. Get the Main + this together if you're starting from scratch.
What if I need more than 4 circuits?
›
Stack more 4Relay modules onto the same main unit. One main + 2 modules = 8 channels. Up to 32 modules per main, for 128 total channels.
Does each channel monitor power independently?
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Yes — every channel has its own current sensor and shows live W, A, V plus history. You see exactly which circuit is consuming what.
Can I install this myself?
›
The DIN-rail mounting is straightforward, but wiring 4 circuits inside a live breaker panel needs an electrician. Plan: electrician handles wiring + mounting, you do the eWeLink setup.
What's the max current per channel?
›
Each channel handles up to 20A. For heavier loads (central AC, well pump), use the channel to switch a contactor instead of switching the load directly.
Does it work with my existing Sonoff Wi-Fi devices?
›
Yes — once paired through the SPM Main Unit, every channel appears in eWeLink alongside your other Sonoff devices. Same scenes, same automations, same voice assistants.
What about EDL cuts?
›
The SPM keeps its configuration through power cuts. When power returns, each channel restores to your chosen Power-on State (ON / OFF / Last). With an SD card in the Main Unit, monitoring data is logged locally even when Wi-Fi is down.
Are the manuals in Arabic?
›
Yes — eWeLink supports Arabic, and the SPM documentation is available in both English and Arabic.
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Still deciding?
Message us on WhatsApp — we'll tell you honestly if this is the right fit for your home.