⚡ Shelly 1PM Gen3 — 16A Smart Relay with Power Metering (WiFi / Bluetooth)

The proven, value-for-money retrofit relay — a compact 16A smart switch with built-in power metering that fits behind an existing wall switch or socket. Connects over WiFi (no hub needed), with Bluetooth for easy setup. The go-to module for making any light or appliance smart on a budget.

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Free Delivery

Orders over R2,500

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Local Stock

Ships from Gauteng

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Power Meter

Built-in

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WiFi Direct

No hub needed

⚡ Key Features

16A Switching + Power Metering — control lights and appliances and see their real-time and historical consumption
WiFi Direct — No Hub — connects straight to your 2.4GHz router; Bluetooth makes first-time setup painless
Retrofit Install — hides behind your existing wall switch; the physical switch keeps working (toggle or push-button, 2-way wiring supported)
Local Control — embedded web interface, schedules, timers, scenes, MQTT, webhooks and Shelly Scripting
Works With Everything — Shelly app, Home Assistant, Google Home, Alexa, SmartThings
Protection Built In — overpower and overtemperature safeguards
Proven Gen3 Platform — fast ESP-based chipset with regular firmware updates from Shelly

💰 Budget Pick: If your smart home runs on WiFi (Shelly app or Home Assistant), the Gen3 does the same core job as the Gen4 for less. Only step up to Gen4 if you specifically want native Zigbee or Matter.

📋 Technical Specifications

Model	Shelly 1PM Gen3
Channels	1
Max Load	16A (~3,500W resistive)
Power Metering	Yes — with consumption history
Protocols	WiFi 802.11 b/g/n (2.4GHz) · Bluetooth
Switch Input	Toggle or momentary; 2-way/cross wiring supported
Integrations	Shelly app/cloud, Home Assistant, MQTT, HTTPS, Webhooks, Shelly Scripting
Hub Required	No
Mounting	In-wall (behind switch/socket)

❓ Frequently Asked Questions

Gen3 or Gen4 — which should I buy?

Both switch 16A and meter power. The Gen4 adds native Zigbee and Matter plus a faster chip. If you're on WiFi/Home Assistant only, the Gen3 is the better-value choice.

Does it need a hub?

No — it connects directly to your 2.4GHz WiFi. Control locally or from anywhere via the Shelly app.

Can it handle my geyser?

Geyser elements should always be switched via a contactor — the 1PM Gen3 then controls and meters the contactor circuit.