Hey!!! long time without talk!!!

I have allways though the larger batt is more to hold the reserve time capacity matched with the car loads demand which usually is of course matched with the alt capacity, but is not a must when upgrading the alt on same specs car. In fact IMHO, a larger batt capacity increases the problem when gets more time to be recharged.

Ppl tipically upgrades the car electrical capacity installing a larger batt load capacity before the alt, when should be made just right the opposite. A larger capacity batt with small capacity alt adds more stress to the charging system.

Alt allways first!