6 Biofuel Cells
(6*6000 EU) [Burned in a Diesel Generator] - (6*(800+100+800) EU) [Productioncost] =
36000 EU - 10200 EU =
Fuel Can filled with 6 Biofuel Cells:
26040 EU [Burned in a Generator] - 10200 EU [see above] - 600 EU [Automatic Canning Cost] =
Loss by using Fuel Cans: 10560 EU
Something similar applies for Coal Fuel Cells.
I know about the Gunpowder, Redstone and Glowstone thing but that doesn't seem to work in the Automatic Canning Machine. Am I missing something? What are filled Fuel Cans good for?