Hi there,
I did not see anything about the connecting 1 Shelly 2.5 to multiple shutters because they are all linked to one single switch, so please accept this new tread 
Configuration :
- 3 wired shutters installed into a "multi faced" window
- 1 power line
- 1 switch installed
I only found one this picture showing a solution with a R2-U-230 relay that allows to command 2 separate shutters linked to one switch
=> Do you think it could be possible / it is allowed to use a R4-U-230 or maybee 2 x R4-U-230 relay to command up to 4 individual shutters still linked to one switch ?
What could be the wiring using this R4 relay ? is there any other "easy/simple/small" existing option ?
Thanks for your help !
Carlito