Shelly now has four main product lines: Gen3, Gen4, DIN-rail Pro and Wave for Z-Wave. On top of that there are Mini versions, PM models with power metering, 2PM for roller shutters and BLU battery sensors. In this comparison you will learn how they differ, which module goes into the box behind a switch and which into the distribution board, and what to choose for Home Assistant, Apple Home or Z-Wave. At the end you will find ready-made bundles with prices.
In short: which Shelly to choose
- Gen4 for a new homeWi-Fi, Bluetooth, Zigbee and Matter in one module. The most versatile choice behind a wall switch.
- Pro for the distribution boardDIN rail, LAN cable, more channels and whole-house metering.
- Wave for Z-WaveIf you run Homey, Yubii/Fibaro or Home Assistant with Z-Wave, Wave fits into your network without Wi-Fi.
Shelly lines at a glance
| Line | Connectivity | Where it goes | Best for |
|---|---|---|---|
| Gen3 | Wi-Fi, Bluetooth, Matter on selected models | in the box behind a switch or socket | the cheapest reliable start over Wi-Fi |
| Gen4 | Wi-Fi, Bluetooth, Zigbee and Matter | in the box behind a switch or socket | new installations, Apple Home and Google via Matter, Zigbee networks |
| Pro | LAN (Ethernet), Wi-Fi, Bluetooth | DIN rail in the distribution board | new builds, renovations, many circuits in one place |
| Wave | Z-Wave (800 series chips, LR versions also Z-Wave Long Range) | in-wall and DIN rail (Wave Pro) | owners of Z-Wave controllers: Homey, Yubii/Fibaro, Home Assistant with Z-Wave |
| BLU | Bluetooth, ZB versions also Zigbee | battery sensors and buttons | an add-on to Wi-Fi Shelly devices acting as a gateway |
The older Plus name belongs to the second generation (Gen2). These modules keep working, but for a new purchase Gen3 or Gen4 is the better buy. All lines from Gen2 to Gen4 have a local web interface, scripting and MQTT, and work without the cloud.
Shelly Gen3 vs Gen4: what is the difference
On the outside, Gen3 and Gen4 modules look almost the same and are wired the same way. The difference is inside:
| Feature | Gen3 | Gen4 |
|---|---|---|
| Wi-Fi | 2.4 GHz | 2.4 GHz with Wi-Fi 6 support |
| Zigbee | no | yes, with a Zigbee hub (e.g. Home Assistant) |
| Matter | selected models only, e.g. the Plug S and Plug M Gen3 plugs | yes |
| RAM | 256 KB | 512 KB, more room for scripts |
| Range extender | Wi-Fi | Wi-Fi and Zigbee |
| Gateway for BLU sensors | yes | yes |
| Price (1PM Mini) | €14.29 | €19.99 |
- Choose Gen4 if you want your devices in Apple Home, Google Home or SmartThings via Matter, if you are building a Zigbee network or want to be future-proof.
- Choose Gen3 if the Shelly app, Home Assistant over Wi-Fi and voice control with Alexa or Google are enough. You save a few euros on every module.
Tip: Gen3 and Gen4 can be freely combined in one app and one scene. You do not need to replace your whole house when adding new modules.
What 1, 1PM, 2PM, Mini, L, i4 and Dimmer mean
| Name | What it is | Typical use |
|---|---|---|
| 1 | 1 channel, potential-free (dry) contact up to 16 A | lights, water heater, contactor, gate or boiler control |
| 1PM | 1 channel up to 16 A with power metering (PM) | appliances, socket circuits, heating |
| 2PM | 2 channels with metering, roller shutter and blind mode | two lights or one shutter with position control |
| Mini | smaller body, up to 8 A | shallow boxes behind switches |
| 1L / 2L | no neutral wire needed | older homes without a neutral in the switch box |
| i4 | 4 inputs, no output | scenes from ordinary push buttons and switches |
| Dimmer | dimmer | dimmable LEDs and bulbs |
| EM / 3EM | single- or three-phase energy meter | whole-house metering, solar PV, heat pump |
In-wall modules: comparison and prices
Shelly 1PM Mini Gen48 A, power metering, Wi-Fi, Zigbee and Matter. The most popular choice behind a switch.€19.99 
Shelly 2PM Gen42 channels with metering, shutters and blinds, Wi-Fi, Zigbee and Matter.€29.35 
Shelly 1 Gen316 A, dry contact, Wi-Fi. An affordable, proven switch.€13.69| Model | Gen3 | Gen4 |
|---|---|---|
| Shelly 1 (16 A) | 1 Gen3 €13.69 | 1 Gen4 €19.49 |
| Shelly 1PM (16 A, metering) | 1PM Gen3 €14.49 | 1PM Gen4 €20.99 |
| Shelly 2PM (2 channels, shutters) | 2PM Gen3 €19.49 | 2PM Gen4 €29.35 |
| Shelly 1 Mini (8 A) | 1 Mini Gen3 €13.49 | 1 Mini Gen4 €17.99 |
| Shelly 1PM Mini (8 A, metering) | 1PM Mini Gen3 €14.29 | 1PM Mini Gen4 €19.99 |
| Dimmer | Dimmer Gen3 €28.80 | Dimmer Gen4 €38.99 |
| No neutral wire | 1L Gen3, 2L Gen3 | – |
| Button inputs | i4 Gen3 €14.60 | – |
Prices and availability load directly from the shop. See the full range in the Shelly category.
Shelly Pro: modules for the distribution board
The Pro line mounts on a DIN rail in the distribution board. Besides Wi-Fi and Bluetooth it has a LAN port, so it keeps working where Wi-Fi does not reach, and you have many circuits neatly in one place. It is ideal for new builds or renovations where the wires from lights and sockets run to the board.
| Model | Channels | Metering | Price |
|---|---|---|---|
| Pro 1 | 1 | no | €55.90 |
| Pro 1PM | 1 | yes | €66.90 |
| Pro 2 | 2 | no | €72.99 |
| Pro 2PM | 2, also shutters | yes | €79.99 |
| Pro 3 | 3 | no | €79.99 |
| Pro 4PM | 4 (up to 40 A total) | yes, display | €107.50 |
| Pro 3EM | three-phase meter | 3× 120 A current clamps | €152.99 |
Pro 4PM replaces four separate modules and shows the consumption of each circuit on its own display. It costs less per channel and saves space in the board.
Shelly Wave: Shelly for Z-Wave networks
Shelly Wave (formerly Shelly Qubino Wave) are the same kinds of modules as Wi-Fi Shelly, but they communicate over Z-Wave. They use neither Wi-Fi nor the Shelly app. They need a Z-Wave controller, such as Homey Pro, Yubii Home or Fibaro or Home Assistant with a Z-Wave adapter. Z-Wave builds its own mesh network and does not load your Wi-Fi, which is why many people choose it for larger houses.
- 800 series chips: lower power consumption and better range than older Z-Wave devices.
- LR (Long Range) versions: also support Z-Wave Long Range with much greater range, for example to a garage, garden or outbuilding. Your controller must support Long Range too.
- Wave Pro: DIN-rail versions for the distribution board.
| Model | What it is | Price |
|---|---|---|
| Wave 1PM | 1 channel with power metering | €23.90 |
| Wave 1 Mini | small 1-channel switch up to 8 A | €25.99 |
| Wave 1PM Mini LR | small switch with metering, Long Range | €37.99 |
| Wave 2PM LR | 2 channels or shutter, Long Range | €43.99 |
| Wave Dimmer | dimmer, Long Range | €44.99 |
| Wave PM Mini | energy meter | €20.99 |
| Wave Plug S LR | plug with metering, Long Range | €28.90 |
| Wave Pro 1 | DIN rail, 1 channel | €43.99 |
| Wave Pro 2PM LR | DIN rail, 2 channels with metering | €85.99 |
| Wave Pro 3 | DIN rail, 3 channels | €85 |
| Wave Pro Shutter LR | DIN rail, shutter control | €98 |
Learn more about the Z-Wave line in Shelly Wave – a new addition to Z-Wave smart homes.
Shelly BLU sensors and gateways
Shelly BLU are small Bluetooth battery devices: buttons, door, motion, temperature and humidity sensors. Versions marked ZB also support Zigbee. A gateway brings them into your network, and that can be any Shelly Gen3 or Gen4 module you already have. The exception is the BLU TRV radiator valve, which needs the BLU Gateway Gen3.
- A button by the bed turns off all lights and lowers the shutters.
- A door sensor lights the hallway when opened or warns you that a window was left open.
- The BLU H&T thermometer switches heating or a fan via the nearest Shelly relay.
Energy metering: EM, 3EM-63T, 3EM-63W and Pro 3EM
Shelly offers more meters than it first seems. They differ in the number of phases, how they mount and how much current they can measure:
| Meter | Phases | Mounting and range | Price |
|---|---|---|---|
| EM Mini Gen4 | 1 | in-wall behind an appliance or circuit, up to 16 A | €19.45 |
| PM Mini Gen3 | 1 | in-wall, up to 16 A, Wi-Fi | €13.80 |
| EM Gen3 + 50 A clamp | 1–2 | current clamps on the wire, 50 A | €66.90 |
| 3EM-63T Gen3 | 3 or 3× 1 | mounts directly above or below the circuit breaker, up to 63 A | €87 |
| 3EM-63W Gen3 | 3 or 3× 1 | wired version, free placement on the DIN rail, up to 63 A | €75.90 |
| Pro EM-50 | 1, 2 channels | DIN rail, 50 A clamps, dry-contact relay | €83.50 |
| Pro 3EM-3CT63 | 3 | DIN rail, LAN, 3× 63 A clamps | €123.99 |
| Pro 3EM (120 A) | 3 | DIN rail, LAN, 3× 120 A clamps, Matter | €152.99 |
| Pro 3EM (400 A) | 3 | DIN rail, LAN, 3× 400 A clamps | €256 |
| Pro 3EM (2000 A) | 3 | DIN rail, LAN, Rogowski coils up to 2000 A, industrial | €799 |
| Wave PM Mini | 1 | Z-Wave, in-wall, up to 16 A | €20.99 |
- 3EM-63T Gen3 is the most compact three-phase meter: it sits directly above or below the circuit breaker. Ideal where space in the board is tight.
- 3EM-63W Gen3 measures the same up to 63 A, but it is the wired version, so you can place the module anywhere on the DIN rail.
- Pro 3EM has a LAN port and current clamps that clip onto the wires without disconnecting them. Choose it for solar PV, a heat pump or a larger house (120 A), or for business use (400 A, 2000 A).
- EM Mini Gen4 and PM Mini Gen3 measure a single circuit or appliance right in the wall box.
With whole-house metering you see instant consumption and solar production, and you can, for example, run the water heater only when you have a solar surplus.
Shelly with Home Assistant, Apple Home, Google and Alexa
- Shelly app: works with all Wi-Fi Gen3, Gen4 and Pro models and with BLU. You set up scenes, timers and rules without another controller.
- Home Assistant: the official Shelly integration discovers Wi-Fi Shelly devices automatically and talks to them locally, without the cloud. Gen4 can also connect via Zigbee (ZHA or Zigbee2MQTT) and Wave via Z-Wave. To get started, see Getting started with Home Assistant.
- Apple Home: easiest via Matter, supported by Gen4 and selected Gen3 models. A detailed guide is in How to use Shelly with Apple HomeKit.
- Google Home and Alexa: by linking your Shelly account or via Matter.
- Z-Wave controllers: the Wave line with Homey Pro, Yubii Home, Fibaro or Home Assistant.
Lights from the switch and the phone
1PM Mini Gen4 behind the switch. The original switch keeps working and you also control the light from your phone or by voice.
No drilling, no new cables.
Shutters that follow the sun
2PM Gen4 lowers the shutters at sunset or when it gets warm in summer.
Position in percent, also for blinds.
Water heater on solar surplus
Pro 3EM measures the surplus and the Pro 1PM switches on the water heater.
You use your rooftop power at home.
Boiler by temperature
Shelly 1 with a dry contact switches the boiler based on the living room thermometer.
A dry contact is safe for the boiler input.
Scenes from ordinary buttons
i4 Gen3 turns four buttons into scenes like “Leaving”, “Night” or “Movie”.
Short, long and double press.
Consumption under control
Plug S Gen3 shows what your washing machine or dryer costs and notifies you when it finishes.
No changes to your wiring.
Ready-made bundles with prices
All products in the bundles are in stock. Prices and availability load directly from the shop.
Two lights, a shutter and a metering plug. Works with the Shelly app, Apple Home and Google.
- 2× Shelly 1PM Mini Gen4€39.98
- Shelly 2PM Gen4 for a shutter€29.35
- Plug S Gen3€21.50
A light, a metered appliance and a shutter over Wi-Fi for the price of dinner for two.
- Shelly 1 Mini Gen3€13.49
- Shelly 1PM Mini Gen3€14.29
- Shelly 2PM Gen3€19.49
Four circuits, two shutters and whole-house metering on a DIN rail with a LAN cable.
- Shelly Pro 4PM€107.50
- Shelly Pro 2PM€79.99
- Shelly Pro 3EM€152.99
For an existing Z-Wave controller: light, dimmer and plug without Wi-Fi.
- Shelly Wave 1PM€23.90
- Shelly Wave 1 Mini€25.99
- Shelly Wave Dimmer€44.99
- Shelly Wave Plug S LR€28.90
Common mistakes when choosing Shelly
- Mini on a heavy load: Mini versions handle 8 A. For a water heater, radiator or socket circuit choose the 16 A 1PM or a Pro module.
- No neutral wire: most modules need one. If your switch box has none, choose the 1L or 2L Gen3.
- Boiler on a regular relay: a boiler input needs a dry (potential-free) contact, so use the Shelly 1 or Pro 1, not a PM version.
- Wave without a controller: Wave modules do not work over Wi-Fi or with the Shelly app. Without a Z-Wave controller you cannot pair them.
- Weak Wi-Fi in the board: a metal enclosure blocks the signal. In the distribution board, go for Pro with a LAN cable.
- DIY installation: mains wiring belongs to a qualified electrician. Always switch off the breaker before any work.
Frequently asked questions
What is the difference between Shelly Gen3 and Gen4?
Besides Wi-Fi and Bluetooth, Gen4 adds Zigbee and Matter, Wi-Fi 6 support and twice the RAM (512 KB vs 256 KB). Gen3 uses Wi-Fi and Bluetooth, and only selected models support Matter. Wiring is the same and both lines can be combined.
Is Gen4 worth the extra money?
Yes, if you want Apple Home or Google Home via Matter, Zigbee or future-proofing. If the Shelly app and Home Assistant over Wi-Fi are enough, Gen3 is cheaper and just as reliable.
What does PM mean on Shelly?
PM stands for power metering. The Shelly 1PM measures consumption on one channel, the 2PM on two. The Shelly 1 without PM has a dry contact instead.
What is the difference between Shelly and Shelly Pro?
Standard Shelly modules go into the box behind a switch and connect over Wi-Fi. Shelly Pro modules mount on a DIN rail in the distribution board and add a LAN port, more channels and, on the 4PM, a display.
What is Shelly Wave and what do I need?
Shelly Wave are Shelly modules for Z-Wave. They do not use Wi-Fi and need a Z-Wave controller such as Homey Pro, Yubii Home, Fibaro or Home Assistant with a Z-Wave adapter. LR versions also support Z-Wave Long Range with greater range.
Does Shelly work without internet and cloud?
Yes. Gen2, Gen3, Gen4 and Pro modules have a local web interface, scripting and MQTT, and talk to Home Assistant locally. You only need internet for cloud control when away from home.
Does Shelly work with Apple Home?
Yes, most easily via Matter, which Gen4 modules and selected Gen3 models such as the Plug S and Plug M Gen3 support.
Do I need a neutral wire for Shelly?
Most modules do. If your switch box has no neutral, use the Shelly 1L or 2L Gen3, which work without it.
How much load can a Shelly Mini handle?
Mini versions handle 8 A. The standard Shelly 1 and 1PM handle 16 A and the Shelly 2PM 2× 10 A.
Not sure which Shelly to choose?
Tell us what you want to control and how it is wired, and we will recommend specific modules. info@homesystem.sk, +421 948 213 492
See all Shelly products