Add-ons
The accessories that complete an installation: a Bypass for dimmers and no-neutral models, a snubber for inductive loads, Add-on expansion modules for sensors, batteries for wireless sensors, and network range extenders.
When you need each accessory
A Bypass is needed when a Shelly 1L, 2L or Dimmer is connected to low-wattage LED bulbs, so the bulb doesn't flicker and turns fully off. A Snubber protects the relay when you connect a motor, a transformer or another inductive load, such as a shutter or a fan. The Add-on for the Plus, Gen3 and Pro series gives the relay inputs for temperature and humidity sensors and dry contacts, and the water heater kit measures the water temperature and controls the heating.
Batteries and connectivity
BLU sensors run on CR123A and AA batteries, and we keep quality batteries in stock. BLU Gateway connects wireless sensors and remotes to the network, and an extension cable for the flood sensor lets you place it at the lowest spot. For large homes with weak Wi-Fi, a Deco system extends the range to every device.
Not sure whether your installation needs a Bypass or a Snubber? Send us the model and the load, and we'll answer.
Product categories
Shelly 1PM Gen4 water heater kit with water temperature sensor
- 16 A relay + temperature sensor
- Power metering
Needs a neutral in the box
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Best seller
Shelly Plus Add-on expansion module for Shelly Plus, Gen3 and Gen4
- Temperature and humidity sensors
- Extra inputs
Fits onto a Shelly Plus / Gen3 / Gen4 relay
Shelly Pro Add-on expansion module for the Shelly Pro series
Out of stock