I need to replace a broken Skylla-TG 24/50 charger, and I was planning to upgrade to an 80A one, but I'm not sure whether to get the TG or I version. What's the difference? Is one a newer model? I'm using a Venus to control everything - do either of those chargers have better compatibility?
You can always compare the data sheets in light of what you want/need:
https://www.victronenergy.com/upload/documents/Datasheet-Skylla-i-EN.pdf
https://www.victronenergy.com/upload/documents/Datasheet-Skylla-Charger-EN.pdf
The Skylla-i can have comms with the Cerbo and NMEA 2000 Canbus. Is lifepo4 ready. So has many advantages over the TG.
