2005 volvo xc90 v8 - $500 (Oroville)

Runs but the charging system isn't charging.
Parked it after the serpentine belt blew last year.
It's on non op now.
I just put a belt and new tensioner but its not charging the battery.
Battery was new last year and seems to hold a charge until the car Is running and drains the battery.
Will need to be towed.