my raspberry doesn\’t have any display and I connect via SSH to the console only. How can I enable the \“power save mode\“ from the minicom?
Because the descriptions says I have to set the jumper and to configure the firmware …
you can use one of our config scripts to edit the settings of your StromPi 3. Even via SSH you can use the GUI config script (see manual page 21 and following). You can find the zip archive containing the scripts in the download section.