Non-Tdm : Batteries - Does Size Matter?

[Trevini]

I'd in the, "if it physically fits, go with it". The difference between them in terms of power isn't significant and the charging system will be fine. If anything, you'll give the electrical system an easier time if drawing a high load as it'll act a a bit of a buffer. I don't know what the alternator is rated at, but if it's 30 amps, it'll put that into any battery without caring what size it is and won't care.