Retrofitting a skylight with an electric roller shutter

Our solarrollos are located in the east and west.

And can someone say something about the radio technology of the two manufacturers, is it Zigbee or z- Z-Wave or something else?

They almost all use the same frequency band, but have "own" closed protocols. What are you planning, that you keep asking? Assume that you will need the "big" gateways for the desired protocol.

In the terraced house, we retrofitted 2 x Home and House with solar battery and remote control. This worked just as well as the two Rotos with solar battery and remote control in the new house. In total, about 8 years of positive experience.

Do you only want to retrofit the roller blind, or the complete double casement window. In new construction, the installation of a double casement window takes about 2 hours with 2 people. Roller blind maybe another 1 hour with 2 people. I paid about €50 (x6) for the double casement window installation, but I also helped myself and got the material. Roller blind at roto and Velux is basically plug & play. Since we have new construction, I went straight for electric (solar costs €100 more, but the cable for electricity including switch also costs about €100)