The warranty for the Rolls S-480 (S480) battery is seven (7) years. The first 24 months are full replacement. The next 60 months are prorated.
For a single string 486 AH battery bank, you will need 2 of the S-480 (S480) for a 12 volt system, 4 of the S-480 (S480) for a 24 volt system and 8 of the S-480 (S480) for a 48 volt system. Each additional string will multiply the AH capacity.