I found the problem guys (which actually isnt one). i forgot that conduits have internal buffer,i was testing and i found out that each conduit has a 1000MJ storage, and that coincidentally matched 5% of the amount of energy i was testing (i was measuring by an internal buffer of a machine, plugged to a redstone energy cell, and it lost more energy because some of it was stored in the conduit). i'm sorry for wasting your time and for sounding like a noob. i'll pay attention next time