its easy to find chargers with the required output voltage + current (15V) needed for the PP Max.
The little problem with all of them i know them is: You get the 15V output requestet by the PP Max only when you have much more then 12V Battery Voltage (Datasheet say 24V) .
They are looking like this when you want to install it permenently: https://www.amazon.de/Thlevel-Ladegerät-Fahrzeuge-Motorrad-Wohnwagen-Blue/dp/B08YN9812H?th=1
Problem is: I didnt find one of them with a so called “boost converter”, so can makes 15V out of 12V…
Does sombody know such an product ?