The PV.DE website is currently offline for a number of reasons:
PV.DE contained a lot of valuable technical information, and I want to preserve as much of it as possible. However, this will take quite some time, which I currently don't have... I hope to come up with something by the end of the year.
Feel free to contact me if you have any questions, suggestions, or demands. My email address is the URL of this domain but with "@posteo" inserted. (Apologies to everyone who tried to contact me with any of my previous email addresses; I do not monitor these regularly because they are drowning in spam.)
(last update: May 2020)