It indicates that the cart is a 2001. That "model year" starts in the fall of 2000 and ends in the fall of 2001 (like a automobile model year). The first two alpha characters in the Serial # (AC) do not indicate month it was built. Not sure what they indicate. If I find the compllete serial # breakdown, I'll post it. Someone with more experience may know off the top of their head, but I don't.
If the batteries are Trojan and you assume they are the original ones, made in August of 2001 (H-01), then I would guess the cart was built in late 2001 model year, possibly between August and October.
For clarification of battery manufacture date code:
Again, 01 is the year 2001
Makes sense now?