Do you always need to have the SF90 connected to the charger?

This feels like a question that's been asked before - one example is here and there are as ever a multitude of opinions https://www.ferrarichat.com/forum/threads/sf90-charging.679095/#post-149192617

It amounts to who do you want to believe: random strangers on the internet, Ferrari themselves or your technician

 

I would go with the official line. These are very complicated cars and if anything needs addressing, it’s best to demonstrate you followed the instructions. One thing that I’ve been advised by several people who own and work on these cars is every 2 weeks or so, if possible, unplug the tender from the car and the wall, and then turn the car on, you dont need to fire the engine, just turn the electrics on. Leave the tender unplugged for a few minutes and then plug the tender into the wall and into the car. Apparently it does help if you reset the tender every few weeks.