awiouy: Indeed, what we are looking at are Python Modules and scripts. The point is, that to install them manually I need various dependencies, as the Hardware is connected via I2C and has a Firmware to be uploaded, and these dependencies are missing. The manufacturer offers a Debian Packet (.deb) te be installed, where all dependencies and scripts are installed automagically.
MikeKL:
No, The software is all low level. It has a script that should cut the power after being shut down and set certain parameters on the hat, to intercept the push of the ON button again and thus powering the device up. This piece of hardware is a kind of an ATX power supply for the PI with the difference that it has a battery onboard to act as a kind of UPS.
This is their Github page, and the packets are available here.
Best regards and thanks for the answers
Merlin