With the help of a double stone slab, you can dupe items.

IC2 forum:
https://forum.industrial-craft.net/thread/13494-ic2-exp-1-10-x-advanced-solar-panels-v4-0-4-hey-i-remember-that/?postID=216277#post216277

Video:
https://www.youtube.com/watch?v=dH6CWvQXbQQ