You'll need panels and a charge controller.
It will take a couple of medium sized panels
to get 10A.  Check bpsolar.com and you'll
see what kind of outputs you can get.

For example, we have two BP 3125 panels on
a mtn cabin.  They are each 26x60" (approx)
and each put out about 8A.

Check http://www.blueskyenergyinc.com/main.htm
for a good charge controller that will max your
output.  The charge controller will control
voltage to batteries to make the charge most
efficient--and not overcharge.

If you have questions, p-mail me, but I'll be
gone until the weekend.

                        Richard A Jones
                        Boulder, Colorado