the exploit will only work with MFSU's, because batbox connected electrolysers will give you only 14000@cell and at a 4eu/t rate
MFE 16000 at 8eu/t so only the MFSU is usable (still you need a LOT of materials for such a low energy profit)
:p o and I thought about this math a long time ago, it was just because I saw this thread I actually calculated the profit
(searching for a new energy exploit :D)
EDIT:
also your MFSU's need always have some energy in them and never more than 25%! so some other mod's need to be used for control (which could also use energy and by doing so negate some of the profit even more)