Relays · Head to head

Shelly 2PM Gen3 vs Shelly 2PM Gen4

Full Smart Relays comparison in 2026

Updated October 2026
Data from Amazon and official Shelly site.
2026 verdict
Protocol choice is what puts the Shelly 2PM Gen4 ahead of the Shelly 2PM Gen3 among these dual-channel relays.
Shelly 2PM Gen4
Winner
Shelly 2PM Gen4
$38.99

Last recorded price

Buy on Amazon USA
It keeps everything the Gen3 does, two 16 A channels, per-channel energy monitoring, interlock mode for shutters, Matter and full overvoltage, overcurrent and overpower protection, and adds a Zigbee mode where it repeats the signal for other devices. The Shelly 2PM Gen3 is Wi-Fi only and answers with the better listed owner rating and a lower price. Size, warranty and platform support are the same on both, so on a Wi-Fi or Matter network there is little to separate them. Pick the Shelly 2PM Gen4 if you run or may move to Zigbee, and the Shelly 2PM Gen3 if you just want the cheaper of two near-identical modules.
Shelly 2PM Gen3
Shelly

Shelly 2PM Gen3

Prime exclusive deal

Last recorded priceOct 6, 2026$24.99

Currently unavailable on Amazon USA
See on Amazon USA
vs
Winner
Shelly 2PM Gen4
Shelly
#5 Best Seller in Relays

Shelly 2PM Gen4

Prime exclusive deal
$38.99

Last recorded price

Buy on Amazon USA

Also sold in packs

  • Pack of 2$75.99$37.99 per unitBuy
  • Pack of 4$147.99$37.00 per unitBuy
Deals by email

Relay prices change while you decide

We follow prices across the catalog and email you the best deals we find.

Smart home deals and news, straight to your inbox

Price drops, new releases and the smart home news worth knowing.

No spam. Unsubscribe in one click.

Your subscription could not be saved. Please try again.
Please enter a valid email address.
Tick the box above to finish signing up.
We couldn't verify you're human. Please try again.
Too many attempts. Please try again in an hour.
Your subscription has been successful.
FeatureShelly 2PM Gen3Shelly 2PM Gen4Winner
Rating4.74.6Shelly 2PM Gen3
Connectivity2.4 GHz WiFi, Bluetooth2.4 GHz WiFi, Bluetooth, ZigbeeShelly 2PM Gen4
Zigbee RouterNOYESShelly 2PM Gen4
Warranty3 years3 yearsTie
SafetyOverheating protection, Overvoltage protection, Overcurrent protection, Overpower protectionOverheating protection, Overvoltage protection, Overcurrent protection, Overpower protectionTie
IntegrationsGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterTie
Relay Channels22Tie
Energy MonitoringYESYESTie

What the differences mean

Zigbee

The Shelly 2PM Gen4 has a Zigbee mode through a hub and acts as a Zigbee router, so it can join a Zigbee network and extend it. The Shelly 2PM Gen3 has no Zigbee and runs on Wi-Fi and Bluetooth only.

What is the same

Both have two independent 16 A channels, per-channel energy monitoring, interlock mode for shutters and blinds, overvoltage, overcurrent and overpower protection, Matter and a 3 year warranty. At 37 x 42 x 16 mm and 30 g, the two fit the same boxes.

DC input and idle draw

The Shelly 2PM Gen3 lists a 30 V and 10 A DC input and an idle draw of 1.4 W. The Shelly 2PM Gen4 does not list either, so for a DC supply project the Gen3 is the one with documented figures.

Wi-Fi to Zigbee switching

On the Shelly 2PM Gen4 the Zigbee mode is a switch you make after setup, and the Wi-Fi access point is disabled while Zigbee is active. It works, but owners call it fiddly, which matters only if you plan to use it.

Which one to buy if

Shelly

Shelly 2PM Gen3

Prime exclusive deal

Last recorded priceOct 6, 2026$24.99

Currently unavailable on Amazon USA
See on Amazon USA
  • + Rating: 4.7
  • - Connectivity: 2.4 GHz WiFi, Bluetooth vs 2.4 GHz WiFi, Bluetooth, Zigbee
  • - Zigbee Router: NO vs YES

What owners say

Owners of both relays praise the same things: reliable local control with Home Assistant and no cloud dependency, energy readings per channel and shutter automation that opens and closes on a schedule. Shelly 2PM Gen3 owners single out a Wi-Fi link that stays stable even deep inside a wall box and setup that can take just minutes, though a vocal minority had trouble joining Wi-Fi from the app or adding it to Alexa, and a couple note a body thicker than the previous generation. Shelly 2PM Gen4 owners single out obstacle detection in cover mode, the Zigbee router and Bluetooth gateway roles, and a smooth Matter pairing with Apple Home, and their complaint is switching from Wi-Fi to Zigbee mode, which they find fiddly and which turns off the access point while it is active.

Upgrading from the Shelly 2PM Gen3?

Moving from the Shelly 2PM Gen3 to the Shelly 2PM Gen4 changes one thing you can point at, Zigbee. The channels, load rating, energy monitoring, protections, Matter support and warranty stay the same, and so does the size. If your Shelly 2PM Gen3 runs on Wi-Fi and works, there is nothing to gain. Upgrade only if you are building a Zigbee network and want the relay on it, and expect a fiddly switch from Wi-Fi mode.

Price history compared

Every price change of both, in the same store, so the gap between the two lines is what one costs more than the other.

  • Shelly 2PM Gen3
  • Shelly 2PM Gen4

Loading price history...

Frequently Asked Questions

Which is better overall: Shelly 2PM Gen3 or Shelly 2PM Gen4?

The Shelly 2PM Gen4, because it adds Zigbee and a Zigbee router role to the same two-channel relay. The Shelly 2PM Gen3 costs less and matches it on channels, monitoring, protection and Matter.

What is the difference between the Shelly 2PM Gen3 and the Shelly 2PM Gen4?

Zigbee. The Shelly 2PM Gen4 can run in Zigbee mode and act as a router, while the Shelly 2PM Gen3 is Wi-Fi and Bluetooth only. Both have two 16 A channels, energy monitoring and Matter.

Do the Shelly 2PM Gen3 and the Shelly 2PM Gen4 have energy monitoring?

Yes, both monitor energy per channel.

Can the Shelly 2PM Gen3 or the Shelly 2PM Gen4 control roller shutters?

Yes. Both have an interlock mode, which keeps the up and down outputs from being powered together, and owners of both use them for shutters and blinds.

Do the Shelly 2PM Gen3 and the Shelly 2PM Gen4 need a neutral wire?

Yes, both list a neutral wire as required.

Who should buy the Shelly 2PM Gen3?

Wi-Fi, Matter and Home Assistant users who want two channels with energy monitoring and shutter control at the lower price, and do not need Zigbee.

Who should buy the Shelly 2PM Gen4?

Buyers who use or plan a Zigbee network and want a dual-channel relay that also repeats the signal for other devices.

Full comparison table

Compare all 49 Relays side by side

You are looking at two of them. The full table lines up all Relays in the catalog with the same specs, so you can filter by what you need and sort by price or rating.

  • 49 Relays
  • 53 specs compared
  • 50 filters
Open the full comparison
More Relays

Top Relays to compare next

49 smart relays and switch modules from 8 brands compared: Shelly, Sonoff, Aqara and more. Load ratings, dry contacts, protocols and local control.

All Relays
Shelly

More Shelly products

A sharper look at other Shelly products worth comparing.

Explore Shelly
Price alert

Get an email when the price drops

How much should it drop?

Cancel anytime from the email.

Independent · Not sponsoredBrands never pay for placement or rankings. Affiliate commissions never influence our comparisons.
© 2026 Smart Home Compared
Search