I've been looking at XP and D series. I do however think that the proper battery varies. I have a 2000 Honda Insight 2 seater. I am currently building a system. I have a DC DC converter instead of an alternator . I have auto stop at stop in the car . I am looking to buy a battery this week as a secondary. Should I go XP or D class? I will need around 3000 watts to power my sound system so I purchased a secondary DC DC to support the XS battery in the cargo area. Any info is greatly appreciated
Angel