The cost of converting your garage door depends on whether you already have an electric door control unit or whether the garage door still has to be opened manually. If you have a manual opening system, you must first install a motor.
Next, you need to select which type of Shelly switch you want to connect to the garage door opener to make the door control smart. For example, you can choose between the Shelly 1 Gen3 or the Shelly 2PM Gen3. The prices for these are between around 18 and 25 euros.
Optionally, you can install additional sensors to increase convenience and functionality. For example, you can connect a reed switch sensor to the digital sensor of the Shelly Plus Add-on and use it to track the status of your garage door. This way, you always know whether it is open or closed and can react accordingly.
All in all, the cost of retrofitting your garage depends on how many functions you want to use. The basic equipment for a smart garage door opener is very affordable.