If you google
home wind turbine, you'll find lots of information on the turbines themselves.
The wiring requirements for distances from 2 and 25 feet (or longer) will depend on the amount of power the turbine generates The overall idea is, for example, that electrical codes would not specify different size wiring for 25 feet as compared to 2 feet. Yet, the codes would probably require you to use larger wire for distances over, let's say, 50 or 100 feet.
Wire size affects the resistance in power transmission from the turbine to the batteries. This resistance leads to two concerns: the danger of fire from overheated wires, and line loss (ie, inefficiency of transmission). These two concerns go hand in hand, but the danger of fire is the greater concern, and it determines the minimum wire size; whereas the concern over obtaining a little more efficiency might drive you to use slightly larger wire.
PS — My gut reaction to (lead acid) batteries on/near roofs is: #1 – leaking and being a danger to the house and its occupants below, #2 – being struck by lightning and exploding/etc and creating the same dangers above, and #3 – the inherent difficulties with installation, servicing, etc.