Here is a calculator I found online. This did not specify the discharge % so you may want to only run up to 80% of the stated run time.
http://www.alternate-energy.net/calcbat06-2.html
This site shows examples of series or parallel battery hookups depending on your needs
http://altwindpower.com/battery-series-parallel.php
http://www.alternate-energy.net/calcbat06-2.html
This site shows examples of series or parallel battery hookups depending on your needs
http://altwindpower.com/battery-series-parallel.php