Thermal Expansion, AgriCraft, RotaryCraft, Mekanism, Extra Utilities, and Magical Crops. What can these do together? POTATO POWER! How? I'll yell ya!
Using Magical Crops, work up some lead seeds and work those up using AgriCraft to a 5x5 field of 10-10-10 lead seeds. Do the same for redstone and potato seeds. Using those, make the lead ore into ingots, then into nuggets. Combine with redstone and potatoes to make tuberous flux capacitors. Pop those into any Mekanism energy cube and BOOM, free power. But wait, there's more! When tuberous flux capacitors are spent, they become baked potatoes, in other words, food. Shove those into a culinary generator and make EVEN MORE POWER. No need for voiding anything and you have a weird source of renewable potato power. How you like them apples?