I used 6V golf cart batteries to start with as well. They are cheep and a best value unless you need a lot of power.

You will produce more power using three strings of two panels fwiw. But Again, I would try four panels before I added the other two. If the power is needed, so be it, but check you water levels often.

If you have a lot of cloudy days, then and only then will two strings of three produce more power. So your milage may vary depending on your climate.

Let us know how the upgrade goes.


Brian

The one thing is the one thing
A dry fly catches no fish
Try not to be THAT 10%