AVM FRITZ!SmartHome Extract not just Watts and kWh, but Ampere (Volt), too

The Fritz DECT integration itself works flawless and I can’t live without it anymore by now. But I miss one thing. The information page in the box tells not just the current consumption in Watt, but it provides Ampere, too. (The diagram even provides Volt) What for? I need the voltage coming from my grid for some scripts and calculations and this would be a perfect way to get what I need. The values are shown there, so they should be somewhere in there.

Fixed myself with quite some help of the maintainer ^^