Wall Mount all weather 280 Ah battery

So, i had the Chargeverter again on 1 Amps from 2 hours, then 4 hours with 5 Amps. I had to stop because of the rain but in a nutshell, i had the chargeverter for about 9 hours. After i disconnected it, the battery voltage dropped down to 0 volts again. The BMS display never turned on. 

Do i really need to continue trying to charge this battery? I believe it is dead and i am very frustrated because the system is only a few months old. Any other fix i can try before the owner ask for a new battery from EG4?